instruction book 1 of 2 m-3311a transformer protection relay

Instruction Book1 of 2

M-3311A TransformerProtection Relay

Transformer ProtectionM-3311A

• For Transformers of All Sizes:2, 3 or 4 winding Transformers for Transmission and DistributionapplicationsGenerator-Transformer Unit Overall DifferentialUnit Protection of Other Electrical Apparatus and certain BusArrangements (including those with a transformer in the zone)

• Additional Applications: System Backup Protection, Load Shedding(voltage and frequency), Bus Protection, and individual Breaker FailureProtection for each winding input

• Options: Ethernet Connection and Expanded I/O

Integrated Protection System®

Unit shown with optional M-3931 HMI Module and M-3911 Target Module

PROTECTION

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M-3311A Transformer Protection Relay

Standard Protective Functions• Negative-sequence inverse time overcurrent (46)

• Winding thermal protection (49)

• Four winding instantaneous phase overcurrent (50)

• Breaker Failure (50BF)

• Instantaneous ground overcurrent (50G)

• Instantaneous residual overcurrent (50N)

• Four winding inverse time phase overcurrent (51)

• Inverse time ground overcurrent (51G)

• Inverse time residual overcurrent (51N)

• Two, three or four winding phase differential (87T) and high set instantaneous (87H)

• Ground differential (87GD)

• IPSlogicTM

Optional Single-Phase Voltage Protection Package• Overexcitation (24) V/Hz, two definite time and one inverse time elements

• Phase undervoltage (27) function for load shedding

• Ground Overvoltage (59G)

• Over/Underfrequency (81O/U)

Standard Features• Eight programmable outputs and six programmable inputs

• Oscillographic recording

• Through-Fault Monitoring

• 10-target storage

• Real time metering of measured and calculated parameters, including demand currents

• Two RS-232 and one RS-485 communications ports

• Standard 19" rack-mount design

• Removable printed circuit board and power supply

• 50 and 60 Hz models available

• 1 or 5 A rated CT inputs available

• M-3826 IPScom® Communications Software

• IRIG-B time synchronization

• Sequence of Events Log

• Breaker Monitoring

• Multiple Setpoint Groups

• Trip Circuit Monitoring

• Includes MODBUS and DNP 3.0 protocols

• Summing Currents from mulitple sources for 49, 50, 51, 50N, 51N, 87 GD and Through Faultfunctions

Optional Features• Redundant Power Supply

• M-3911A Target Module

• M-3931 Human-Machine Interface (HMI) Module

• M-3801D IPSplot® Plus Oscillograph Analysis Software

• RJ45 Ethernet port utilizing MODBUS over TCP/IP

• Expanded I/O (8 additional outputs and 12 additional inputs)

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STANDARD PROTECTIVE FUNCTIONSSTANDARD PROTECTIVE FUNCTIONSSTANDARD PROTECTIVE FUNCTIONSSTANDARD PROTECTIVE FUNCTIONSSTANDARD PROTECTIVE FUNCTIONS

DeviceDeviceDeviceDeviceDevice SetpointSetpointSetpointSetpointSetpointNumber Function Ranges Increment Accuracy†

Negative Sequence Overcurrent

46W2/46W3/46W4

Definite TimePickup 0.10 to 20.00 A 0.01 A 0.1 A or 3%

(0.02 to 4.00 A) ( 0.02 A or 3%)

Time Delay 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or 1%

Inverse TimePickup 0.50 to 5.00 A 0.01 A 0.1 A or 3%

(0.10 to 1.00 A) ( 0.02 A or 3%)

Characteristic Curves Definite Time/Inverse/Very Inverse/Extremely Inverse/IEC CurvesTime Dial Setting 0.5 to 11.0 0.1 3 Cycles or 5%

0.05 to 1.10 (IEC curves) 0.010.85 to 1.15 (IEEE curves) 0.01

Winding Thermal Protection

Time Constant 1.0 to 999.9 minutes 0.1 minutes

Maximum Overload Current 1.00 to 10.00 A 0.01 A 0.01 A

Winding Select Sum1, Sum2, W1, W2, W3, or W4

Instantaneous Phase Overcurrent

1-8

Pickup 1.0 to 100.0 A 0.1 A 0.1 A or 3%(0.2 to 20.0 A) ( 0.02 A or 3%)

Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles or 1%

Current Selection Sum1, Sum2, W1, W2, W3, W4

Breaker Failure

50BFW1/50BFW2/50BFW3/50BFW4

Pickup (phase) 0.10 to 10.00 A 0.01 A 0.1 A or 2%(0.02 to 2.00 A) ( 0.02 A or 2%)

Pickup (residual) 0.10 to 10.00 A 0.01 A 0.1 A or 2%(0.02 to 2.00 A) ( 0.02 A or 2%)


Instantaneous Ground Overcurrent

50GW2/50GW3/50GW4

Pickup #1, #2 1.0 to 100.0 A 0.1 A 0.1 A or 3%(0.2 to 20.0 A) ( 0.02 A or 3%)

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 2 Cycles or 1%

†Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondaryrating.

46

50

50G

49

50BF

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STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (contcontcontcontcont.).).).).)DeviceDeviceDeviceDeviceDevice SetpointSetpointSetpointSetpointSetpointNumberNumberNumberNumberNumber FunctionFunctionFunctionFunctionFunction RangesRangesRangesRangesRanges IncrementIncrementIncrementIncrementIncrement AccuracyAccuracyAccuracyAccuracyAccuracy†††††

Instantaneous Residual Overcurrent

1-8


Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles or 1%


Inverse Time Phase Overcurrent

1-4



Characteristic Curve Beco Definite Time/Inverse/Very Inverse/Extremely InverseIEC Inverse/Very Inverse/Extremely Inverse/Long Time InverseIEEE Moderately Inverse/Very Inverse/Extremely Inverse

Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 3%0.05 to 1.10 (IEC curves) 0.01

0.85 to 1.15 (IEEE curves) 0.01

Two or three of the windings may be summed together.

Inverse Time Ground Overcurrent

51GW2/51GW3/51GW4



Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 3%0.05 to 1.10 (IEC curves) 0.01

0.85 to 1.15 (IEEE curves) 0.01

Inverse Time Residual Overcurrent

1-4



Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 5%

0.05 to 1.10 (IEC curves) 0.010.85 to 1.15 (IEEE curves) 0.01


†Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating.

51N

51G

51

50N

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87

STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (contcontcontcontcont.).).).).)DeviceDeviceDeviceDeviceDevice SetpointSetpointSetpointSetpointSetpointNumberNumberNumberNumberNumber FunctionFunctionFunctionFunctionFunction RangesRangesRangesRangesRanges IncrementIncrementIncrementIncrementIncrement AccuracyAccuracyAccuracyAccuracyAccuracy†††††

Phase Differential Current

87H

Pickup 5.0 to 20.0 PU 0.1 PU 0.1 PU or 3%


87T

Pickup 0.10 to 1.00 PU 0.01 PU 0.02 PU or 5%

Percent Slope #1 5 to 100% 1% 1%

Percent Slope #2 5 to 200% 1% 1%

Slope Break Point 1.0 to 4.0 PU 0.1 PU —

Even Harmonics Restraint 5 to 50% 1% 1%or 0.1 A( 2nd and 4th)

5th Harmonic Restraint 5 to 50% 1% 1% or 0.1 A

Pickup at 5thHarmonic Restraint 0.10 to 2.00 PU 0.01 PU 0.1 PU or 5%

CT Tap W1/W2/W3/W4 1.00 to 100.00 0.01 —(0.2 to 20)

Trip response for 87T and 87H (if time delay set to 1 cycle) is less than 1.5 cycles. Each restraint elementmay be individually disabled, enabled, or set for cross phase averaging.

Ground Differential

87GDW2/87GDW3/87GDW4

Pickup #1, #2 0.2 to 10.00 A 0.01 A 0.1 A or 5%(0.04 to 2.00 A) ( 0.02 A or 5%)

Time Delay #1, #2 1 to 8160 Cycles* 1 Cycle –1 to +3 Cycles or 1%

3IO Current Selection Sum1, Sum2, W2

Directional Element Disable/Enable

CT Ratio Correction (Rc) 0.10 to 7.99 0.01

*The Time Delay should not be less than 2 cycles.This function is selectable as either directional or non-directional. If 3l0 is extremely small, directionalelement is disabled.

IPSlogic

IPSlogic uses element pickups, element trip commands, control/status input state changes,output contact close signals with programmable logic array to develop schemes.

Reset/Droput Delay #1–#6 0 to 65500 Cycles 1 Cycle 1 Cycle or 1%

Time Delay #1–#6 1 to 65500 Cycles 1 Cycle 1 Cycle or 1%

Trip Circuit Monitoring

Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

The AUX input is provided for monitoring the integrity of the trip circuit. This input can be used for nominaltrip coil voltages of 24 V dc, 48 V dc, 125 V dc and 250 V dc.

IPS

87GD

†Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating.

TCM

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STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (STANDARD PROTECTIVE FUNCTIONS (contcontcontcontcont.).).).).)DeviceDeviceDeviceDeviceDevice SetpointSetpointSetpointSetpointSetpointNumber Function Ranges Increment Accuracy†

Breaker Monitoring

Pickup 1 to 50,000 kA Cycles 1 kA Cycles 1 kACyclesor kA2 Cycles or kA2 Cycles or kA2 Cycles

Time Delay 0.1 to 4095.9 Cycles 0.1 Cycles 1 Cycle or 1%

Timing Method IT or I2T

Preset Accumulators 0 to 50,000 kA Cycles 1 kA CyclePhase A, B, C

The Breaker Monitor feature calculates an estimate of the per-phase wear on the breaker contacts by measur-ing and integrating the current (or current squared) through the breaker contacts as an arc.

The per-phase values are added to an accumulated total for each phase, and then compared to a user-programmed threshhold value. When the threshhold is exceeded in any phase, the relay can set a program-mable output contact.

The accumulated value for each phase can be displayed.

The Breaker Monitoring feature requires an initiating contact to begin accumulation, and the accumulationbegins after the set time delay.

Through Fault

Through Fault 1.0 to 100.0 (A) 0.1A 0.1A or 5%Current Threshold ( 0.02A or 5%)

Through Fault Count Limit 1 to 65535 1 —

Cumulative I2T Limit 1 to 1000000(kA2 Cycles) 1 1.0 kA Cyclesor kA2 Cycles

Time Delay 1 to 8160 Cycles 1Cycle 1 Cycle or 1%

Current Selection Sum1, Sum2, W1, W2, W3 or W4 — —

Nominal Settings

Nominal Voltage 60.0 to 140.0 V 0.1 V —

VT Configuration VA, VB, VC, VAB, VBC, VCA, VG

Phase Rotation ABC/ACB — —

Number of Windings 2, 3, or 4

Transformer/CT Connection Standard IEEE/IEC or Custom Connections

Functions that can be Implemented with Overcurrent/Input-OutputConnections

Load SheddingCan help prevent overloading of remaining transformers when a station transformer is out ofservice.

Bus Fault ProtectionProvides high speed bus protection by combining digital feeder relay logic and transformerprotection logic.

Feeder Digital Relay BackupProvides backup tripping of feeder relays by combining the self test alarm output of the feederrelays with the transformer relay.

LTC fault blockingProvides limited blocking of LTC during fault conditions.

†Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondaryrating.

BM

TF

–7–


81O/U

59G

24

27

0PTIONAL SINGLE-PHASE VOLTAGE PROTECTION PACKAGE0PTIONAL SINGLE-PHASE VOLTAGE PROTECTION PACKAGE0PTIONAL SINGLE-PHASE VOLTAGE PROTECTION PACKAGE0PTIONAL SINGLE-PHASE VOLTAGE PROTECTION PACKAGE0PTIONAL SINGLE-PHASE VOLTAGE PROTECTION PACKAGE

DeviceDeviceDeviceDeviceDevice SetpointSetpointSetpointSetpointSetpointNumberNumberNumberNumberNumber FunctionFunctionFunctionFunctionFunction RangesRangesRangesRangesRanges IncrementIncrementIncrementIncrementIncrement AccuracyAccuracyAccuracyAccuracyAccuracy†††††

Volts/Hz Overexcitation

Definite Time

Pickup #1, #2 100 to 200% 1% 1%

Time Delay #1, #2 30 to 8160 Cycles 1 Cycle +25 Cycles

Inverse Time

Pickup 100 to 150% 1% 1%

Characteristic Curves Inverse Time #1–#4 — —

Time Dial: Curve #1 1 to 100 1 —Time Dial: Curves #2–#4 0.0 to 9.0 0.1 —

Reset Rate 1 to 999 Sec. 1 Sec. .06 Seconds or 1%(from threshold of trip)

Pickup based on nominal VT secondary voltage and nominal system frequency. Accuracy applicable from10 to 80 Hz, 0 to 180 V, and 100 to 150% V/Hz.

This function is applicable only when phase voltage input is applied.

Phase Undervoltage

Pickup 5 to 140 V 1 V 0.5 V

Inhibit Setting 5 to 140 V 1 V 0.5 V


This function is applicable only when phase voltage input is applied.

Ground Overvoltage

Pickup #1, #2 5 to 180 V 1 V 0.5 V or 0.5%

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

This function is applicable only when voltage input from a broken delta VT is applied.

Overfrequency/Underfrequency

Pickup #1, #2, #3, #4 55.00 to 65.00 Hz 0.01 Hz 0.1 Hz45.00 to 55.00 Hz*

Time Delay #1, #2, #3, #4 2 to 65,500** Cycles 1 Cycle –1 to +3 Cycles or 1%

Accuracy applies to 60 Hz models at a range of 57 to 63 Hz, and to 50 Hz models at a range of 47 to 53Hz.* This range applies to 50 Hz nominal frequency models.** For 65,500 cycles, time delay setting phase voltage must be greater than 35 V ac.This function is applicable only when phase voltage of at least 27 V ac input is applied.

–8–


Configuration OptionsThe M-3311A Transformer Protection Relay may be purchased as a fully configured two, three or fourwinding Transformer Protection System. The M-3311A can also be purchased with the Optional Single-Phase Voltage Protection Package to expand the system to satisfy specific application needs.

Multiple Setpoint Profiles (Groups)The relay supports four setpoint profiles. This feature allows multiple setpoint profiles to be defined fordifferent power system configurations. Profiles can be switched either manually using the Human-MachineInterface (HMI), communication, or by control/status inputs.

MeteringMetering of voltage, three-phase and neutral currents, and frequency. Phase voltage and current meteringinclude sequence components.

Real Time Demand (interval of 15, 30 or 60 minutes), and Maximum Demand (with date and time stamp)metering of current.

Metering accuracies are:

Voltage: 0.5 V or 0.5%, whichever is greater (range 0 to 180 V ac)

Current: 5 A rating, 0.1 A or 3%, whichever is greater (range 0 to 14 A)1 A rating, 0.02 A or 3%, whichever is greater (range 0 to 2.8 A)

Frequency: 0.1 Hz (from 57 to 63 Hz for 60 Hz models; from 47 to 53 Hz for 50 Hz models)

Oscillographic RecorderThe oscillographic recorder provides comprehensive data recording of all monitored waveforms for Windings1, 2, 3 and 4. The total record length is user-configurable up to 24 partitions. The amount of data storeddepends on the winding configuration and number of partitions. For example; 2 windings and 1 partitionconfiguration can store up to 311 cycles, 3 windings and 1 partition configuration can store up to 231 cyclesand 4 windings and 1 partition configuration can store up to 183 cycles.

The sampling rate is 16 times the power system nominal frequency (50 or 60 Hz). The recorder is triggered bya designated status input, trip output, or using serial communications. When untriggered, the recordercontinuously stores waveform data, thereby keeping the most recent data in memory. When triggered, therecorder stores pre-trigger data, then continues to store data in memory for a user-defined, post-trigger delayperiod. The records may be analyzed using Beckwith Electric IPSplot® Plus Oscillograph Analysis Software,and are also available in COMTRADE file format.

Sequence of Events LogThe Sequence Events Log records predefined relay events. The Sequence of Events Log includes 512 of themost recently recorded relay events. The events and the associated data is available for viewing utilizing theM-3826 IPScom Communications Software.

Through Fault RecorderIn addition to the Even Recorder, the M-3311A also has a separate Through Fault Recorder, which recordsThrough Faults. Each through fault record contains the serial number of the fault, duration of the event,maximum RMS fault current magnitude for each phase during the fault, I2t and the time stamp of the fault. Inaddition, it will also store the total number of through faults since last reset and total I2t for each phase sincelast reset (up to 256 records).

Target StorageA total of 8 targets can be stored. This information includes the function(s) operated, the function(s) pickedup, input/output contact status, time stamp, phase and ground currents.

–9–


CalculationsCurrent and Voltage Values: Uses discrete Fourier Transform (DFT) algorithm on sampled voltage andcurrent signals to extract fundamental frequency phasors for M-3311A calculations.

Power Input OptionsNominal 110/120/230/240 V ac, 50/60 Hz, or nominal 110/125/220/250 V dc. Operates properly from 85 V acto 265 V ac and from 80 V dc to 312.5 V dc. Withstands 300 V ac or 315 V dc for 1 second. Nominal burden20 VA at 120 V ac/125 V dc.

Nominal 24/48 V dc, operates properly from 18 V dc to 56 V dc, withstands 65 V dc for 1 second. Burden 25VA at 24 V dc and 30 VA at 48 V dc.

An optional redundant power supply is available for units that are purchased without the I/O Expansion Module.

For those units purchased with the I/O Expansion Module the unit includes two power supplies which arerequired.

Sensing InputsTwo Voltage Inputs: Rated nominal voltage of 60 V ac to 140 V ac, 50/60 Hz. Withstands 240 V continuousvoltage and 360 V for 10 seconds. Voltage input may be connected to phase voltage (L-G or L-L), or to abroken delta VT. Voltage transformer burden less than 0.2 VA at 120 V.

15 Current Inputs: Rated current (IR) of 5.0 A or 1.0 A (optional), 50/60 Hz. Withstands 3 I

R continuous

current and 100 IR for 1 second. Current transformer burden is less than 0.5 VA at 5 A (5 A option), or 0.3 VA

at 1 A (1 A option).

Control/Status InputsThe control/status inputs, INPUT1 through INPUT6, can be programmed to block any of the relay functions,trigger the oscillographic recorder, select a setpoint group, or to operate one or more outputs. The control/status inputs are designed to be connected to dry contacts and are internally wetted, with a 24 V dc powersupply. To provide breaker status LED indication on the front panel, the INPUT1 status input contact must beconnected to the 52b breaker status contact.

The optional Expanded I/O includes an additional 12 programmable control/status inputs.

Output ContactsAny of the functions can be individually programmed to activate any one or more of the eight programmableoutput contacts OUTPUT1 through OUTPUT8. Any output contact can also be selected as pulsed or latched.IPSlogic can also be used to activate an output contact.

The optional I/O Expansion Module includes an additional 8 programmable output contacts.

The eight output contacts (six form ‘a’ and two form ‘c’), the power supply alarm output contact (form ‘b’), theself-test alarm output contact (form ‘c’) and the optional 8 I/O Expansion Module output contacts (form 'a') areall rated per ANSI/IEEE C37.90-1989 for tripping. Make 30 A for 0.2 seconds, carry 8 A, break 6 A at 120 Vac, break 0.5 A at 48 V dc; 0.3 A, 125 V dc; 0.2 A, 250 V dc with L/R=40 mSec.

Breaker MonitoringThe Breaker Monitoring function calculates an estimate of the per-phase wear on the breaker contacts bymeasuring and integrating the current (selected as I2t or It) passing through the breaker contacts during theinterruption interval. The per-phase values are summed as an accumulated total for each phase, and thencompared to a user-programmed threshold value. When the threshold is exceeded in any phase, the relaycan activate a programmable ouput contact. The accumulated value for each phase can be displayed as anactual value.

–10–


IPSlogicThis feature can be programmed utilizing the IPScom® Communications Software. IPSlogic takes thecontact input status and function status, and by employing (OR, AND, and NOT) boolean logic and a timercan activate an output or change setting profiles.

Target/Status Indicators and ControlsThe RELAY OK LED reveals proper cycling of the microcomputer. The BRKR CLOSED LED illuminateswhen the breaker is closed (when the 52b contact is open). The OSC TRIG LED indicates that oscillographicdata has been recorded in the unit's memory. The corresponding TARGET LED will illuminate when any of therelay functions trip. Pressing and releasing the TARGET RESET button resets the TARGET LEDs if theconditions causing the operation have been removed. Pressing and holding the TARGET RESET button willallow elements or functions in pickup to be displayed. The PS1 and PS2 LEDs remain illuminated as long aspower is applied to the unit and the power supply is operating properly. TIME SYNCH LED illuminates whenvalid IRIG-B signal is applied and time synchronization has been established.

CommunicationCommunication ports include rear RS-232 and RS-485 ports, a front RS-232 port, and a rear IRIG-B port(Ethernet port optional). The communications protocol implements serial, byte-oriented, asynchronouscommunication, providing the following functions when used with the Windows™-compatible M-3826IPScom® Communications Software.

• Interrogation and modification of setpoints

• Time-stamped trip target information for the 32 most recent events

• Real-time metering of all measured and calculated quantities, real-time monitoring of percentagedifferential characteristics, and vector displays of compensated and uncompensated phasors.

• Downloading of recorded oscillographic data

• Downloading of Through-Fault Event Log

• MODBUS and DNP 3.0 protocols are supported

Detailed documentation on the above protocols is available on the Beckwith Electric website, atwww.beckwithelectric.com

IRIG-BThe M-3311A accepts either modulated or demodulated IRIG-B time clock synchronization signals. TheIRIG-B time synchronization information is used to correct the local calendar/clock and provide greaterresolution for target and oscillograph time tagging.

HMI Module (optional)Local access to the M-3311A is provided through an optional M-3931 Human-Machine Interface (HMI)Module, allowing for easy-to-use, menu-driven access to all functions via a 6-button keyboard and a 2-line by24 character alphanumeric display. The M-3931 module includes the following features:

• User-definable access codes providing three levels of security

• Interrogation and modification of setpoints

• Time-stamped trip target information for the 8 most recent events

• Real-time metering of all measured and calculated quantities

I/O Expansion Module (optional)An optional I/O Expansion Module provides an additional 8 form 'a' output contacts and an additional 12control/status inputs. Output LEDs indicate the status of the output relays.

–11–


Target Module (optional)An optional M-3911A Target Module provides 24 target and 8 output LEDs. Appropriate target LEDsilluminate when the corresponding M-3311A function trips. The targets can be reset with the M-3311ATARGET RESET button if the trip conditions have been removed. The OUTPUT LEDs illuminate when a givenprogrammable output is actuated.

M-3801D IPSplot® Plus Oscillograph Analysis Software (optional)M-3801D IPSplot Plus Oscillograph Analysis Software enables the plotting and printing of M-3311A waveformdata downloaded from the relay to any IBM-PC compatible computer.

Tests and StandardsThe relay complies with the following type tests and standards:

Voltage Withstand

Dielectric WithstandIEC 60255-5 3,500 V dc for 1 minute applied to each independent circuit to earth

3,500 V dc for 1 minute applied between each independent circuit1,500 V dc for 1 minute applied to IRIG-B circuit to earth1,500 V dc for 1 minute applied between IRIG-B to each independent circuit1,500 V dc for 1 minute applied between RS-485 to each independent circuit

Impulse VoltageIEC 60255-5 5,000 V pk, +/- polarity applied to each independent circuit to earth

5,000 V pk, +/- polarity applied between each independent circuit1.2 by 50 μs, 500 ohms impedance, three surges at 1 every 5 seconds

Insulation ResistanceIEC 60255-5 > 100 Megaohms

Electrical Environment

Electrostatic Discharge TestIEC 60255-22-2 Class 4 (8 kV)—point contact discharge

IEC 60255-22-2 Class 4 (15 kV)–air discharge

Fast Transient Disturbance TestIEC 60255-22-4 Class A (4 kV, 2.5 kHz)

Surge Withstand CapabilityANSI/IEEE 2,500 V pk-pk oscillatory applied to each independent circuit to earthC37.90.1- 2,500 V pk-pk oscillatory applied between each independent circuit1989 5,000 V pk Fast Transient applied to each independent circuit to earth

5,000 V pk Fast Transient applied between each independent circuit

ANSI/IEEE 2,500 V pk-pk oscillatory applied to each independent circuit to earthC37.90.1- 2,500 V pk-pk oscillatory applied between each independent circuit 2002 4,000 V pk Fast Transient burst applied to each independent circuit to earth

4,000 V pk Fast Transient burst applied between each independent circuit

NOTE: The signal is applied to the digital data circuits (RS-232, RS-485, IRIG-B, Ethernet communicationport and field ground coupling port) through capacitive coupling clamp.

–12–


Radiated SusceptibilityANSI/IEEE 25-1000 Mhz @ 35 V/mC37.90.2

Output ContactsANSI/IEEE Make 30 A for 0.2 seconds, off for 15 seconds for 2,000 operations, per Section 6.7.1,C37.90.0 Tripping Output Performance Requirements

Atmospheric Environment

TemperatureIEC 60068-2-1 Cold, –20° CIEC 60068-2-2 Dry Heat, +70° CIEC 60068-2-3 Damp Heat, +40° C @ 93% RH

Mechanical Environment

VibrationIEC 60255-21-1 Vibration response Class 1, 0.5 g

Vibration endurance Class 1, 1.0 g

IEC 60255-21-2 Shock Response Class 1, 0.5 gShock Withstand Class 1, 15.0 gBump Endurance Class 1, 10.0g

ComplianceCULUS-Listed per 508 – Industrial Control Equipment

– Industrial Control Equipment Certified for Canada CAN/USA C22.2 No. 14-M91

CULUS-Listed per 508A – Table SA1.1 Industrial Control Panels

External ConnectionsM-3311A external connections points are illustrated in Figure 1 and 2.

PhysicalWithout Optional I/O Expansion Module

Size: 19.00" wide x 5.21" high x 10.20" deep (48.3 cm x 13.2 cm x 25.9 cm)

Mounting: The unit is a standard 19", semiflush, three-unit high, rack-mount panel design, conforming toANSI/EIA RS-310C and DIN 41494 Part 5 specifications. Vertical or horizontal panel-mount options areavailable.

Approximate Weight: 16 lbs (7 kg)

Approximate Shipping Weight: 25 lbs (11.3 kg)

With Optional I/O Expansion Module

Size: 19.00" wide x 6.96" high x 10.2" deep (48.3 cm x 17.7 cm x 25.9 cm)

Mounting: The unit is a standard 19", semiflush, four-unit high, rack-mount panel design, conforming toANSI/EIA RS-310C and DIN 41494 Part 5 specifications. Vertical or horizontal panel-mount options areavailable.

Approximate Weight: 19 lbs (8.6 kg)

Approximate Shipping Weight: 26 lbs (11.8 kg)

–13–


Recommended Storage Parameters

Temperature: 5° C to 40° C

Humidity: Maximum relative humidity 80% for temperatures up to 31° C, decreasing to 31° Clinearly to 50% relative humidity at 40° C.

Environment: Storage area to be free of dust, corrosive gases, flammable materials, dew,percolating water, rain and solar radiation.

See M-3311A Instruction Book, Appendix E, Layup and Storage for additional information.

Patent & WarrantyThe M-3311A Generator Protection Relay is covered by U.S. Patents 5,592,393 and 5,224,011.

The M-3311A Generator Protection Relay is covered by a five-year warranty from date of shipment.

Specification subject to change without notice.

–14–


Figure 1External C

onnections

NO

TES:

1.O

utput contacts #1 through #4 contain special circuitry for high-speed operation, and close 4 ms faster than outputs 5 throu gh 8. O

utputs 1 through6 are form

“a” contacts (normally open) and outputs 7 and 8 are form

“c” contacts (center tapped 'a' and 'b' contacts).

2.T

o comply w

ith UL and C

SA

listing requirements, term

inal block connections must be m

ade with #12 A

WG

solid or stranded copper wire inserted in

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ire insulation must be rated at 60° C

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um. T

erminal block connections 1 through 34 m

ust betightened to 12 inch-pounds torque. T

erminal block connections 35 through 63 m

ust be tightened to 8 inch-pounds torque.

3.O

nly dry contacts must be connected to inputs (term

inals 5 through 10 with 11 com

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ll relays are shown in the de-energized state, and w

ithout power applied to the relay

5.T

he power supply relay (P

/S) is energized w

hen the power supply is functioning properly.

6.T

he self-test relay is energized when the relay has perform

ed all self-tests successfully.

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IRIG

-BR

S-

23

2C

OM

21

23

54

67

89

1011

1213

1415

PS

1P

S2

63

6465

3A

MP

,2

50

V(3

AB

)

F4

F2

F3 F1

87

1917

1618

2021

22

65

43

2623

2425

2827

29

21

3031

3233

34

SE

LF

-T

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TP

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INR

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ININ

ININ

IN1

23

45

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(52

b)

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TP

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SA

LA

RM

SIN

PU

TS

RS

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3A

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DC

UR

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NT

1A,N

OM

5A

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M

WINDING

2 (W2)

B IC I

G IA I

IB

WINDING

3 (W3)

GI

VG

WINDING

4 (W4)

IB I

C IIG

A

6667

7168

6970

7372

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INS

TR

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NM

AN

UA

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IC

CO

M2

18-

56

VD

C8

5-

26

0V

DC

/VA

C

WINDING

1 (W1)

VO

A IB I

C IA I

3536

3837

3942

4041

4344

PS

2+

-P

S1

+-

18-5

6V

DC

85

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0V

DC

/VA

C

24125250

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SE

RIA

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50

Hz

60

Hz

MO

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re 2

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nded

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IN 10

IN 9

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CC

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TC

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+-

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war

e: D

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9

–16–


51W1

50W1

46W3

50BFW3

50W3

51W3

59G

3-CT

3-CT

M-3311A

This function is available as astandard protective function.

This function is available in theOptional Single-Phase VoltageProtection Package.

M-3311A TypicalConnection DiagramFour Winding Model

B

1-CT

R

87GDW2

50NBFW2

51NW2

87H

Winding 1(W1)

Winding 2(W2) Winding 3

(W3)50GW2

51GW2

C

87T

1

46W2

50BFW2

50W2

51W2

1

50GW3

51GW3

87GDW3

50NBFW3

51NW3

R

1

1

1

3-CT

1-CT

50NBFW1

51NW1

50BFW1

49W1

49W2

49W3

50NW2

50NW1

50NW3

Targets(Optional)

Integral HMI(Optional)

Metering

Sequence OfEvents

Waveform Capture

IRIG-B

Front RS232Communication

Multiple SettingGroups

Programmable I/O

Self Diagnostics

Dual Power Supply(Optional)

*

*

*

Rear RS-232/485Communication

ProgrammableLogic

A

RJ45 Ethernet(Optional)

52 52

51W4

50W4

1

50NBFW4

51NW4

50BFW4

49W4

50NW4

*

3-CT

Winding 4(W4)

VT 2 1-VT 2

81O/U

2724

V V0G

* 49 Function can only be enabled in one winding.

NOTES:1. All 50 and 50G functions may be applied instantaneous or definite time, and are multiple (2)

elements, each with individual pickup and time delay setpoints.

2. Two voltage inputs are available in the 4-winding model of the M-3311A. These are a phasevoltage Vφ use for the 81O/U, 27, and 24 Functions and the VG broken delta input voltage used forthe 59G function. These voltage inputs are not winding dependent.

Figure 3 M-3311A Typical One-Line Function Diagram

–17–


51Sum

50Sum

46W3

50BFW3

50W3

51W3

59G

3-CT

3-CT

M-3311A




B

1-CT

R

87GDW2

50NBFW2

51NW2

87H

Winding 1(W1)


(W3)50GW2

51GW2

C

87T

1

46W2

50BFW2

50W2

51W2

1

50GW3

51GW3

87GDW3

50NBFW3

51NW3

R

1

1

1

3-CT

1-CT

50NBF

Sum

51NSum

50BFSum

49Sum

49W2

49W3

50NW2

50NW1

50NW3

Targets(Optional)


Metering

Sequence OfEvents

Waveform Capture

IRIG-B



Programmable I/O

Self Diagnostics


*

*

*


ProgrammableLogic

A


52 523-CT

Winding 4(W4)

VT 2 1-VT 2

81O/U

2724Σ

* Two sets of summed winding cuurentscan be enabled at a time.

VGVo





Figure 4 Typical M-3311A Summing Currents One Line Functional Diagram

–18–


52

52

R

Aux

M-3311A

System

Figure 6 Generator Plant Overall Differential Zone of Protection

52

5252

52 M-3311A

R

Aux

M-3311A

R

M-3311ASystem

52

Aux

REF

Figure 5 Dual Generator Power Plant Differential Zone of Protection

–19–


52

5252

M-3311A

System

Y

R

Figure 7 Three Winding Transformer with High Impedance Ground

52

System

52

System

52

M-3311A M-3311A

Figure 8 Dual Bank Distribution Substation

–20–


M-3311A

W1 W2

W3

52 52

52 52

W4

87GD W2

R

NOTES:

1. Winding 1 & 2 current summed and Winding 3 & 4 current summed for overcurrent function

2. 87GDW2 function 3Io current is the sum of W1, W2, W3 and W4 currents.

Figure 9 Auto Transformer with two Circuit Breakers on High and Low Side

M-3311A

W1 W2

W3

52-3 52-4

52-1 52-2

W4

Figure 10 Two Winding Transformer with Two Circuit Breakers on High and Low Sides

–21–


15

16

PS2 P/S

+

-

61 63

60 62 12

13

31

32

33

34

Self-Test

PS1 OUT 2Typical

OUT 1Typical

Self-Test

Alarm

Power OKStatusAlarm

TripAlarm

52Trip

M-3311A Output Contacts

PowerTransformer

5150

M-3311A (W-2)

A B CA

B

C

A

B

C

52

OR

Winding 2(W-2)

Winding 3(W-3)

IG2

37 36

OR

37 36

A B C

52

ABC

5958

M-3311A (W-3)IG3

M-3311A

M-3311A

R R

A

B

C

VG65

64

M-3311A

5756

5554

5352

M-3311A (W-3)

ABC

U

49 48

47 46

45 44

M-3311A (W-2)

A B C

VO

VO

5252

10 9 8 11

IN 1(52b)

IN 2Typical

IN 3Typical

INReturn

52b OtherInputs

OtherInputs

M-3311A Input Contacts

43 42

41 40

39 38

M-3311A (W-1)

7170

6968

6766

M-3311A (W-4)

Figure 11 Typical Three-Line Connection Diagram

–22–


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Figure 12 Horizontal Mounting Dimensions

–23–


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Figure 14 Vertical Mounting Dimensions

–25–


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BECKWITH ELECTRIC CO., INC.6190 - 118th Avenue North • Largo, Florida 33773-3724 U.S.A.

PHONE (727) 544-2326 • FAX (727) 546-0121E-MAIL [email protected] PAGE www.beckwithelectric.com

© 2005 Beckwith Electric Co.Printed in U.S.A. (1.15.03)

800-3311A-SP-02MC1 03/08

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DANGER! HIGH VOLTAGE

– This sign warns that the area is connected to a dangerous high voltage, and youmust never touch it.

PERSONNEL SAFETY PRECAUTIONSThe following general rules and other specific warnings throughout the manual must be followed during application,test or repair of this equipment. Failure to do so will violate standards for safety in the design, manufacture, and intendeduse of the product. Qualified personnel should be the only ones who operate and maintain this equipment. BeckwithElectric Co., Inc. assumes no liability for the customer’s failure to comply with these requirements.

– This sign means that you should refer to the corresponding section of the operation

manual for important information before proceeding.

Always Ground the Equipment

To avoid possible shock hazard, the chassis must be connected to an electrical ground. When servicingequipment in a test area, the Protective Earth Terminal must be attached to a separate ground securelyby use of a tool, since it is not grounded by external connectors.

Do NOT operate in an explosive environmentDo not operate this equipment in the presence of flammable or explosive gases or fumes. To do so wouldrisk a possible fire or explosion.

Keep away from live circuitsOperating personnel must not remove the cover or expose the printed circuit board while power is ap-plied. In no case may components be replaced with power applied. In some instances, dangerous volt-ages may exist even when power is disconnected. To avoid electrical shock, always disconnect power anddischarge circuits before working on the unit.

Exercise care during installation, operation, & maintenance proceduresThe equipment described in this manual contains voltages high enough to cause serious injury or death.Only qualified personnel should install, operate, test, and maintain this equipment. Be sure that all per-sonnel safety procedures are carefully followed. Exercise due care when operating or servicing alone.

Do not modify equipmentDo not perform any unauthorized modifications on this instrument. Return of the unit to a BeckwithElectric repair facility is preferred. If authorized modifications are to be attempted, be sure to followreplacement procedures carefully to assure that safety features are maintained.

PRODUCT CAUTIONSBefore attempting any test, calibration, or maintenance procedure, personnel must be completely familiarwith the particular circuitry of this unit, and have an adequate understanding of field effect devices. If acomponent is found to be defective, always follow replacement procedures carefully to that assure safetyfeatures are maintained. Always replace components with those of equal or better quality as shown in theParts List of the Instruction Book.

Avoid static chargeThis unit contains MOS circuitry, which can be damaged by improper test or rework procedures. Careshould be taken to avoid static charge on work surfaces and service personnel.

Use caution when measuring resistancesAny attempt to measure resistances between points on the printed circuit board, unless otherwise notedin the Instruction Book, is likely to cause damage to the unit.

i

TABLE OF CONTENTSM-3311A Transformer Protection

Instruction Book

Specification

Chapter 1 Introduction

1.1 Instruction Book Contents ................................................................... 1–1Chapter 1: Introduction ........................................................................ 1–1Chapter 2: Operation ............................................................................ 1–1Chapter 3: IPScom .............................................................................. 1–1Chapter 4: System Setup and Setpoints .............................................. 1–1Chapter 5: Installation .......................................................................... 1–1Chapter 6: Testing ............................................................................... 1–1Appendix A: Configuration Record Forms ............................................ 1–1Appendix B: Communications ............................................................. 1–1Appendix C: Self-Test Error Codes ...................................................... 1–2Appendix D: Inverse Time Curves ....................................................... 1–2Appendix E: Layup and Storage .......................................................... 1–2

1.2 M-3311A Transformer Protection Relay ............................................... 1–2

Chapter 2 Operation

2.1 Operation ............................................................................................. 2–1Alphanumeric Display .......................................................................... 2–2Screen Blanking .................................................................................. 2–2Arrow Pushbuttons .............................................................................. 2–2EXIT Pushbuttons ............................................................................... 2–2ENTER Pushbutton ............................................................................. 2–2RELAY OK LED .................................................................................. 2–2Time Sync LED ................................................................................... 2–2Breaker Closed (BRKR CLOSED) LED ................................................ 2–2Diagnostic LED (DIAG) ........................................................................ 2–2Power Supply (PS1) and (PS2) LEDs .................................................. 2–3Target LED .......................................................................................... 2–3M-3911A Target Module and Target Reset Pushbutton ....................... 2–3

2.2 Operation (HMI/PC) ............................................................................. 2–4HMI Operation Overview ...................................................................... 2–4Default Message Screens.................................................................... 2–4HMI Security ....................................................................................... 2–4Status Monitoring (From Relay Front Panel) ........................................ 2–6Primary Metering and Status ............................................................... 2–7Secondary Metering and Status .......................................................... 2–8Metering II ........................................................................................... 2–9View Targets ......................................................................................2–14Oscillograph Recorder Data ................................................................2–15User Access Codes ............................................................................2–22Through Fault Recorder (Through IPScom) .........................................2–25

Chapters Book 1 of 2 Page

ii

Chapter 3 IPScom®

3.1 IPScom Functional Description ........................................................... 3–1IPScom Main Screen Menu Bar .......................................................... 3–1Shortcut Command Buttons ................................................................. 3–1IPScom Main Screen Status Line ....................................................... 3–1File Menu ............................................................................................ 3–4Monitor/Primary Metering and Status .................................................. 3–7Monitor/Secondary Metering and Status .............................................. 3–8Monitor/Metering II ............................................................................... 3–9Monitor/Phaser Diagram .....................................................................3–10Monitor/Phaser Diagram (F87T) ..........................................................3–11Monitor/Pickup/Timeout Status ..........................................................3–12Relay Menu ........................................................................................3–13Relay Setup ........................................................................................3–13Relay/Setup/Configuration ..................................................................3–13Relay/Setup/Relay Setpoints ..............................................................3–14Relay/Setup/Extended I/O ..................................................................3–15Relay/Setup/Setpoints/Display/I/O Map .............................................3–16Relay/Setup/Display All Setpoints ......................................................3–17Relay/Demand Status .........................................................................3–18Relay/Targets .....................................................................................3–19Relay/Through Fault ...........................................................................3–20Relay/Sequence of Events .................................................................3–21Relay/Oscillograph..............................................................................3–23Relay/Profile .......................................................................................3–24Relay/Write File to Relay ....................................................................3–25Relay/Read Data From Relay .............................................................3–25Tools Menu.........................................................................................3–25User Control Number ..........................................................................3–26Window Menu .....................................................................................3–28Help Menu ..........................................................................................3–28

Chapter 4 System Setup and Setpoints

4.1 Unit Setup ........................................................................................... 4–1Comm Access Code ............................................................................ 4–1IPScom Comm Access Code Setup ................................................... 4–2HMI Comm Access Code Setup .......................................................... 4–2IPScom User Access Code Setup ...................................................... 4–3Setup User Access Codes .................................................................. 4–3HMI User Access Codes Setup ........................................................... 4–4User Logo Line .................................................................................... 4–5User Control Number ........................................................................... 4–5System OK Led ................................................................................... 4–5IPScom User Logo Line, User Control Number andSystem OK Led Setup ......................................................................... 4–5HMI User Logo Line Setup ................................................................... 4–5HMI User Control Number Setup ......................................................... 4–6HMI System OK LED Setup ................................................................ 4–7System Clock ...................................................................................... 4–8

Chapters Book 1 of 2 (cont) Page

iii

Chapter 4 System Setup and Setpoints (cont)

IPScom Set Date/Time........................................................................ 4–8HMI Set Date and Time ....................................................................... 4–8Communication Setup ........................................................................4–10Ethernet Communication Settings ......................................................4–13DCHP Protocol ...................................................................................4–13Ethernet Protocols ..............................................................................4–13Installing the Modems ........................................................................4–16Oscillograph Setup .............................................................................4–18

4.2 System Setup ....................................................................................4–24

4.3 System Diagrams ...............................................................................4–30

4.4 System Setpoints ...............................................................................4–3324 Volts/Hz Overexcitation .................................................................4–3427 Phase Undervoltage.......................................................................4–3846 Negative Sequence Overcurrent ....................................................4–3949 Winding Thermal Protection ...........................................................4–4150BF Breaker Failure ..........................................................................4–4450/50G Instantaneous Overcurrent, Phase & Ground .........................4–4650N Instantaneous Residual Overcurrent ............................................4–4851 Inverse Time Phase Overcurrent ...................................................4–4951 Inverse Time Residual Overcurrent ................................................4–5051G Inverse Time Ground Overcurrent ...............................................4–5159 Ground Overvoltage .......................................................................4–5281O/U Over/Underfrequence...............................................................4–5387 Phase Differential ..........................................................................4–55Coss Phase Averaging .......................................................................4–5787GD Ground Differential ....................................................................4–60Trip Circuit Monitoring .........................................................................4–62Breaker Monitoring ..............................................................................4–63Through Fault .....................................................................................4–64IPSlogic ..............................................................................................4–65

4.5 System Applications and Logic Schemes ..........................................4–70Bus Fault Protection ...........................................................................4–70Backup for Digital Feeder Relay Failure ..............................................4–71Load Shedding ....................................................................................4–72LTC Blocking During Faults ................................................................4–74

4.6 Transformer Connections ....................................................................4–75Transformer Winding Selection ...........................................................4–75Transformer and CT Configuration ......................................................4–75Standard Transformer and CT Configuration .......................................4–75Phase Angle Shift - Standard Connections .........................................4–75Phase Angle Shift - Custom Connections ...........................................4–77Calculation of Differential & Restraint Currents ...................................4–79M-3311A Connection Examples .........................................................4–79Auxiliary Transformer Example...........................................................4–79GSU Transformer Example .................................................................4–79


iv

Chapter 5 Installation

5.1 General Information ............................................................................. 5–1

5.2 Mechanical/Physical Dimensions ........................................................ 5–1

5.3 External Connections........................................................................... 5–6

5.4 Commissioning Checkout ...................................................................5–10

5.5 Circuit Board Switches and Jumpers ..................................................5–11

5.6 IPScom Communications Software Installation ..................................5–14

5.7 Activating Initial Local Communications .............................................5–14

5.8 Initial Setup Procedure .......................................................................5–15

Chapter 6 Testing

6.1 Equipment and Test Setup .................................................................. 6–2

6.2 Diagnostic Test Procedures ................................................................ 6–3Output Test (Relay) ............................................................................. 6–3Input Test (Status) ............................................................................... 6–4Status LED Test .................................................................................. 6–5Target LED Test .................................................................................. 6–5Button Test .......................................................................................... 6–6Display Test ........................................................................................ 6–6Communication Tests .......................................................................... 6–6COM1 and COM2 Test ........................................................................ 6–6COM3 Test (2-wire) ............................................................................. 6–7Clock Test ........................................................................................... 6–8Flash Relay OK LED ........................................................................... 6–8Factory Use Only ................................................................................ 6–8

6.3 Automatic Calibration........................................................................... 6–9

6.4 Input Configurations ............................................................................6–10

6.5 Functional Test Procedures ................................................................6–12Power On Self Tests ..........................................................................6–1324DT Volts/Hz Overexcitation Definite Time (#1 or #2) ......................6–1424IT Volts/Hz Overexcitation Inverse Time ........................................6–1527 Phase Undervoltage.......................................................................6–1646DT Negative Sequence Overcurrent Definite Time..........................6–1746IT Negative Sequence Overcurrent Inverse Time ...........................6–1849 Winding Thermal Protection ...........................................................6–1950 Instantaneous Phase Overcurrent Winding 1-8 ..............................6–2150G Instantaneous Ground Overcurrent .............................................6–2250N Instantaneous Residual Overcurrent ............................................6–2350BF Breaker Failure ..........................................................................6–2451 Inverse Time Phase Overcurrent ...................................................6–2651G Inverse Time Ground Overcurrent ...............................................6–2851N Inverse Time Residual Overcurrent .............................................6–2959G Ground Overvoltage (#1 or #2) ....................................................6–3181 Overfrequency/Underfrequency .....................................................6–32

Chapters Book 2 of 2 Page

v

Chapter 6 Testing (cont)

87H Phase Differential Overcurrent ....................................................6–3387T Phase Differential Overcurrent .....................................................6–3487GD Ground Differential (#1, #2) .......................................................6–37BM Breaker Monitoring .......................................................................6–38Trip Circuit Monitoring .........................................................................6–40Through Fault .....................................................................................6–41IPSlogic (#1-6) ....................................................................................6–42

Appendices

Appendix A: Forms .............................................................................. A–1

Appendix B: Communications ............................................................. B–1

Appendix C: Error Codes ..................................................................... C–1

Appendix D: Inverse Time Curves ....................................................... D–1

Appendix E: Layup and Storage .......................................................... E–1


vi

Chapter 1 Introduction

1-1 M-3911A Target Module ...................................................................... 1–4

1-2 M-3931 Human-Machine Interface (HMI) Module ................................. 1–4

Chapter 2 Operation

2-1 M-3311A Front Panel ........................................................................... 2–3

2-2 Screen Message Menu Flow................................................................ 2–4

2-3 Main HMI Menu Flow ........................................................................... 2–5

2-4 Primary Metering and Status Screen ................................................... 2–7

2-5 Secondary Metering and Status Screen .............................................. 2–8

2-6 Metering II Screen ............................................................................... 2–9

2-7 Demand Status Screen.......................................................................2–12

2-8 View Targets Screen ..........................................................................2–14

2-9 Clear Targets Confirmation Dialog Screen ..........................................2–14

2-10 Clear Targets Dialog Screen ...............................................................2–15

2-11 Retrieve Oscillograph Record Dialog Screen ......................................2–17

2-12 Oscillograph Record Download Dialog Screen ....................................2–17

2-13 Oscillograph Download Successful Confirmation Screen ....................2–17

2-14 Trigger Oscillograph Confirmation Screen ..........................................2–18

2-15 Oscillograph Successfully Triggered Dialog Screen ...........................2–18

2-16 Clear Oscillograph Records Confirmation Screen ...............................2–18

2-17 Oscillograph Successfully Triggered Dialog Screen ...........................2–18

2-18 Change Comm Access Code Dialog Screen .......................................2–21

2-19 Comm Access Code Change Confirmation Screen.............................2–21

2-20 Access Code Changed Confirmation Screen ......................................2–21

2-21 Change User Access Code Dialog Screen ..........................................2–22

2-22 Counters and Error Codes Dialog Screen............................................2–24

2-23 View Through Fault Record Screen ....................................................2–25

2-24 Clear Through Fault Record Confirmation Screen ...............................2–26

2-25 Through Fault Record Cleared Successfully Screen ...........................2–26

2-26 Sequence of Events Retrieve/Download Screen.................................2–26

2-27 Sequence of Events View Screen ......................................................2–27

2-28 Clear Sequence of Events Record Command Confirmation Screen ....2–27

2-29 Sequence of Events Record Cleared Confirmation Screen .................2–27

Figures Book 1 of 2 Page

vii

Chapter 3 IPScomTM

3-1 IPScom Program Icon ......................................................................... 3–1

3-2 IPScom Main Screen........................................................................... 3–2

3-3 M-3826 IPScom Menu Selection ......................................................... 3–3

3-4 New System Dialog Screen ................................................................. 3–4

3-5 IPScom Serial Communication Dialog Screen ..................................... 3–5

3-6 IPScom TCP/IP Ethernet Communication Dialog Screen .................... 3–5

3-7 IPScom Modem Communication Dialog Screen .................................. 3–6

3-8 Terminal Window ................................................................................. 3–6

3-9 Primary Metering Status Screen .......................................................... 3–7

3-10 Secondary Metering Status Screen ..................................................... 3–8

3-11 Metering II Screen ............................................................................... 3–9

3-12 Phasor Diagram ..................................................................................3–10

3-13 Phasor Diagram (F87T) .......................................................................3–11

3-14 Pickup/Timeout Status .......................................................................3–12

3-15 87T Function Dual Slope Display ........................................................3–12

3-16 M-3826 IPScom Configuration Dialog Screen .....................................3–13

3-17 Relay Setpoints Dialog Screen ...........................................................3–14

3-18 Example Function Dialog Screen........................................................3–14

3-19 Expanded I/O Enable/Disable Screen .................................................3–15

3-20 Date/Time Dialog Screen ....................................................................3–15

3-21 I/O Map Screen ..................................................................................3–16

3-22 Display All Setpoints Screen ..............................................................3–17

3-23 Demand Status Dialog Screen ............................................................3–19

3-24 View Targets Dialog Screen ...............................................................3–19

3-25 View Through Fault Record Screen ....................................................3–20

3-26 Sequence of Events Recorder Setup Screen .....................................3–21

3-27 Sequence of Events Recorder Retrieve Screen ..................................3–21

3-28 Sequence of Events Recorder View Screen .......................................3–22

3-29 Setup Oscillograph Recorder Dialog Screen .......................................3–23

3-30 Oscillograph Recorder Retrieve Dialog Screen ...................................3–23

3-31 Profile Switching Method Dialog Screen .............................................3–24

3-32 Select Profile Dialog Screen ...............................................................3–24

3-33 Copy Active Profile Dialog Screen ......................................................3–24

Figures Book 1 of 2 (cont) Page

viii

Chapter 3 IPScomTM (cont)

3-34 Change Comm Access Code Dialog Screen .......................................3–25

3-35 Change User Access Code Dialog Screen ..........................................3–25

3-36 User Information Screen .....................................................................3–26

3-37 Change Relay Communication Address Dialog Screen .......................3–26

3-38 Setup Relay Comm Port Dialog Screen ..............................................3–26

3-39 Setup Relay Ethernet Port Dialog Screen ...........................................3–26

3-40 Output Test Dialog Screen .................................................................3–27

3-41 Counters and Error Codes Dialog Screen............................................3–27


4-1 Change Comm Access Code Dialog Screen ........................................ 4–2

4-2 Comm Access Code Change Confirmation Screen.............................. 4–2

4-3 Access Code Changed Confirmation Screen ....................................... 4–2

4-4 Change User Access Code Dialog Screen ........................................... 4–3

4-5 User Information Dialog Screen ........................................................... 4–5

4-6 Setup Date/Time Dialog Screen .......................................................... 4–8

4-7 Setup Comm Port Dialog Screen ........................................................4–10

4-8 Setup Comm Port Dialog Screen ........................................................4–11

4-9 Setup Ethernet Screen .......................................................................4–13

4-10 Modem Dialog Screen ........................................................................4–16

4-11 Terminal Window ................................................................................4–17

4-12 Setup Oscillograph Recorder ..............................................................4–19

4-13 Setup Sequence of Events Recorder Dialog Screen ...........................4–21

4-14 IPScom® Relay Configuration Dialog ..................................................4–29

4-15 Selection Screen for Expanded Input .................................................4–29

4-16 A Typical One-Line Functional Diagram ..............................................4–30

4-17 M-3311A Typical Summing Currents One-Line Functional Diagram....4–31

4-18 Typical Three-Line Connection Diagram .............................................4–32

4-19 Example of V/Hz Capability and Protection Curves ............................4–35

4-20 M-3826 IPScom® (24) Volts/Hertz Setpoint Ranges ...........................4–37

4-21 M-3826 IPScom® (27) Undervoltage Setpoint Ranges ........................4–38

4-22 M-3826 IPScom® (46) Negative Sequence OvercurrentSetpoint Ranges..................................................................................4–40


ix


4-23 49 Function Overload Curves .............................................................4–42

4-24 M-3826 IPScom® (49) Winding Thermal Protection Setpoint Ranges....4–43

4-25 Breaker Failure Logic Diagram............................................................4–44

4-26 M-3826 IPScom® (50BF) Breaker Failure Setpoint Ranges ................4–45

4-27 M-3826 IPScom®(50) Instantaneous Phase OvercurrentSetpoint Ranges .................................................................................4–47

4-28 M-3826 IPScom® (50G) Instantaneous Ground OvercurrentSetpoint Ranges .................................................................................4–47

4-29 M-3826 IPScom®(50N) Instantaneous Residual OvercurrentSetpoint Ranges .................................................................................4–48

4-30 M-3826 IPScom® (51) Inverse Time Phase OvercurrentSetpoint Ranges .................................................................................4–49

4-31 M-3826 IPScom® (51N) Inverse Time Residual OvercurrentSetpoint Ranges .................................................................................4–50

4-32 M-3826 IPScom®(51G) Inverse Time Ground OvercurrentSetpoint Ranges .................................................................................4–51

4-33 M-3826 IPScom® (59G) Ground Overvoltage Setpoint Ranges...........4–52

4-34 IPScom® (81O/U) Over/Underfrequency Setpoint Ranges ..................4–54

4-35 M-3826 IPScom®(87) Phase Differential Current Setpoint Ranges .....4–55

4-36 Transformer CT Tap Setting Example ................................................4–57

4-37 87T Programmable Dual Slope Percentage Restraint Characteristic ....4–58

4-38 M-3826 IPScom® (87GD) Ground Differential Current Setpoint Ranges ....4–61

4-39 Trip Circuit Monitoring Input ................................................................4–62

4-40 Trip Circuit Monitor (TC) Setpoint Ranges ..........................................4–62

4-41 M-3826 IPScom® Breaker Monitor Setpoint Ranges ...........................4–63

4-42 M-3826 IPScom Through Fault Function Setpoint Ranges .................4–64

4-43 IPSlogic Function Setup .....................................................................4–66

4-44 M-3826 IPScom®(IPS) IPSlogic Functions Setpoint Ranges ..............4–67

4-45 Select Initiating Functions Screen ......................................................4–68

4-46 IPSlogic® Function Setup ...................................................................4–69

4-47 Bus Fault Protection Scheme .............................................................4–70

4-48 Digital Feeder Relay Backup Scheme ................................................4–71

4-49 Feeder Backup Logic ..........................................................................4–71

4-50 Two Bank Load Shedding Scheme .....................................................4–72

4-51 Load Shedding Logic .........................................................................4–73


x


4-52 LTC Blocking Scheme During Faults ..................................................4–74

4-53 Typical Transformer Differential Application .......................................4–80

4-54 Delta-ac/Wye/Wye CT Connection Diagram .......................................4–81

4-55 Custom Settings for Delta-ac/Wye/Wye .............................................4–82

4-56 Wye/Delta-ac/Delta-ac CT Connection Diagram .................................4–83

4-57 Custom Settings for Wye/Delta-ac/Delta-ac .......................................4–84


xi


5-1 M-3311A Mounting Dimensions – Horizontal Chassis ........................ 5–2

5-2 M-3311A Mounting Dimensions – Vertical Chassis ............................ 5–3

5-3 (H2) Mounting Dimensions ................................................................... 5–4

5-4 (H3) Mounting Dimensions for GE L-2 Cabinet .................................... 5–5

5-5 Optional Dual Power Supply ................................................................ 5–6

5-6 Expanded I/O Power Supply ................................................................ 5–6

5-7 Four Winding External Connections ..................................................... 5–7

5-8 M-3311A Four Winding Extended Output External Connections .......... 5–8

5-9 Three-Line Connection Diagram ........................................................... 5–9

5-10 M-3311A Circuit Board ........................................................................5–13

5-11 IPScom Program Icon ........................................................................5–14

Chapter 6 Testing

6-1 Status LED Panel ................................................................................ 6–5

6-2 M-3911 Target Module ......................................................................... 6–5

6-3 M-3931 Human-Machine Interface Module ........................................... 6–6

6-4 COM1/COM2 Loopback Plug ............................................................... 6–7

6-5 RS-485 2-Wire Testing ......................................................................... 6–7

6-6 Voltage Calibration Configuration ......................................................... 6–9

6-7 Current Calibration Configuration ......................................................... 6–9

6-8 Voltage Inputs, Configuration V1 ........................................................6–10

6-9 Voltage Inputs, Configuration V2 ........................................................6–10

6-10 Current Inputs, Configuration C1 .........................................................6–10





6-15 Current Configuration C6 .....................................................................6–11

Figures Book 2 of 2 Page

xii

Appendix A

A-1 M-3931 Human-Machine Interface Module ........................................... A–4

A-2 Functional Configuration Record Form ................................................. A–5

A-3 Unit Setup and Communication Data Record Form............................ A–14

A-4 Setpoint & Timing Record Form ........................................................ A–19

A-5 Functional Configuration Record Form As Shipped............................ A–33

A-6 Unit Setup and Communication Data Record Form As Shipped ........ A–42

A-7 Setpoint & Timing Record Form As Shipped ..................................... A–47

Appendix B

B-1 Null Modem Cable for M-3311A ........................................................... B–3

B-2 RS-232 Fiber Optic Network ................................................................ B–4

B-3 RS-485 Network................................................................................... B–5

Appendix D

D-1 Volts/Hz (24IT) Inverse Curve Family #1 (Inverse Square) ................. D–2

D-2 Volts/Hz (24IT) Inverse Curve Family #2 ............................................. D–3

D-3 Volts/Hz (24IT) Inverse Time Curve Family #3 .................................... D–4

D-4 Volts/Hz (24IT) Inverse Curve Family #4 ............................................. D–5

D-5 Definite Time Overcurrent Curve ......................................................... D–8

D-6 Inverse Time Overcurrent Curve .......................................................... D–9

D-7 Very Inverse Time Overcurrent Curve ............................................... D–10

D-8 Extremely Inverse Time Overcurrent Curve ...................................... D–11

D-9 IEC Curve #1 – Inverse .................................................................... D–12

D-10 IEC Curve #2 – Very Inverse ........................................................... D–13

D-11 IEC Curve #3 – Extremely Inverse................................................... D–14

D-12 IEC Curve #4 – Long Time Inverse .................................................. D–15

D-13 IEEE (Moderately) Inverse Time Overcurrent Curves ........................ D–16

D-14 IEEE Very Inverse Time Overcurrent Curves .................................... D–17

D-15 IEEE Extremely Inverse Time Overcurrent Curves ........................... D–18


xiii


1-1 M-3311A Device Functions .................................................................. 1–2

Chapter 2 Operation

2-1 Recorder Partitions .............................................................................2–15


4-1 Dead Sync Time .................................................................................4–11

4-2 Recorder Partitions .............................................................................4–18

4-3 Input Activated Profile Logic ...............................................................4–24

4-4 Transformer Connections ....................................................................4–76

4-5 Standard Transformer and CT Configuration Options ..........................4–77

4-6 Custom Transformer and CT Configuration .........................................4–78

Tables Book 1 of 2 Page

Tables Book 2 of 2 Page


5-1 Circuit Board Jumpers ........................................................................5–12

5-2 Circuit Board Switches .......................................................................5–12

5-3 Trip Circuit Monitor Input Voltage Select Jumper Configuration ..........5–12

Chapter 6 Testing

6-1 Output Contacts .................................................................................. 6–3

6-2 Input Contacts ..................................................................................... 6–4

Appendix A Configuration Forms

A-1 Relay Configuration ............................................................................. A–2

A-2 Relay Configuration As Shipped ........................................................ A–61

Appendix B Communications

B-1 Communication Port Signals ............................................................... B–3

Appendix C Error Codes

C-1 Self-test Error Codes ........................................................................... C–1

Appendix D Inverse Time Curves

D-1A M-3311A Inverse Time Overcurrent Relay Characteristic Curves ........ D–6

D-1B M-3311A Inverse Time Overcurrent Relay Characteristic Curves ........ D–7

800-3311A-IB-00MC2 03/08©2007 Beckwith Electric Co.Printed in U.S.A. (9.21.01)

Introduction – 1

1–1

1.1 Instruction Book Contents

This instruction book includes six Chapters and fiveAppendices.

Chapter 1: IntroductionChapter One summarizes the devices’ capabilities,introduces the instruction book contents anddescribes the application of an M-3311A.

Chapter 2: OperationChapter Two provides the necessary instructionsregarding operation of the M-3311A. Manual operationof the M-3311A is accomplished by utilizing eitherthe unit's front panel controls and indicators, whichinclude the M-3931 Human Machine Interface (HMI)and M-3911 Status Module or through the M-3826IPScomTM Communications and OscillographicAnalysis Software.

Chapter 3: IPScomChapter 3 provides a description of each element ofthe M-3826 IPScom Communications Software. TheIPScom menu structure and commands are describedin detail for each feature and function.

Chapter 4: System Setup and SetpointsChapter Four is designed for the person(s) responsiblefor the direct setting and configuration of the system.It describes the procedures for entering all requireddata into the M-3311A. Included in this chapter arefunctional and connection diagrams for a typicalapplication for the system; and describes theconfiguration process for the unit (choosing active

1 Introduction

1.1 Instruction Book Contents ......................................................... 1–1

1.2 M-3311A Transformer Protection Relay .................................... 1–2

1.3 Accessories ................................................................................ 1–4

functions), output contact assignment and inputblocking designation. It also illustrates the definitionof system quantities and equipment characteristicsrequired by the M-3311A, and describes the individualfunction settings.

Chapter 5: InstallationThe person or group responsible for the installationof the M-3311A will find herein all mechanicalinformation required for physical installation,equipment ratings, and all external connections inthis chapter. For reference, the Three-Line ConnectionDiagrams are repeated from Chapter 4, SystemSetup and Setpoints. Further, a commissioningcheckout procedure is outlined to check the externalCT and VT connections. Additional tests which maybe desirable at the time of installation are describedin Chapter 6, Testing.

Chapter 6: TestingThis chapter provides step-by-step test proceduresfor each function, as well as diagnostic mode andauto-calibration procedures.

Appendix A: Configuration Record FormsThis Appendix supplies a set of forms to record anddocument the settings required for the properoperation of the M-3311A.

Appendix B: CommunicationsThis Appendix describes communication port signalsand various topologies and equipment required forremote communication.

M-3311A Instruction Book

1–2

Appendix C: Self-Test Error CodesThis Appendix lists all the error codes and theirdefinitions.

Appendix D: Inverse Time CurvesThis appendix contains a graph of the four familiesof Inverse Time Curves for V/Hz applications, thefour standard and the four IEC overcurrent curves.Also included are three IEEE inverse time curves.

Appendix E: Layup and StorageThis Appendix provides the recommended storageparameters, periodic surveillance activities and layupconfiguration.

1.2 M-3311A TransformerProtection Relay

The M-3311A Transformer Protection Relay, is amicroprocessor-based unit that uses digital signalprocessing technology to protect a high voltagetransformer from internal winding faults, system faults(Through Faults), abnormal voltage and frequency,negative sequence current, overloading, andoverexcitation (V/Hz) disturbances. The M-3311Aalso provides system wide protection by implementingbreaker failure, load shedding, bus fault and digitalfeeder relay backup protection capability.

The available M-3311A Transformer ProtectiveFunctions are listed in Table 1-1. The nomenclaturefollows the standards of ANSI/IEEE Std. C37.2,Standard Electric Power Systems Device FunctionNumbers where applicable.

The control/status inputs can be programmed toblock and/or to trigger the oscillograph recorder. Anyof the functions or the control/status inputs can beindividually programmed to activate any one or moreof the programmable outputs, each with a contact.

The M-3931 Human Machine Interface (HMI) Moduleallows the user to access the following features andfunctions from the M-3311A front panel using a menu-driven, 2 line by 24 character alphanumeric display:

Settings

• Enter Comm settings

• Set Access Codes

• Set User Control Number

• Set display User Lines 1 and 2

• Set Date/Time

Functions

• Clear Alarm Counter

• Enter Diagnostic Mode

• Clear Error Codes

Status

• Metering of various quantities, includingvoltage, current, frequency and phase-angle

• I/O Status

• Alarm Counter

• M-3311A Unit Last Power Up Date andTime

• M-3311A Unit Firmware Version and SerialNumber

• Error Codes

• Checksums

STANDARD FUNCTIONS DESCRIPTION

46W2,3,4 Negative Sequence Overcurrent

49 Winding Thermal Protection(W1 or W2 or W3)

50 1-8 Instantaneous Phase Overcurrent

50BFW1,2,3,4 Breaker Failure

50GW2,3,4 Instantaneous Ground Overcurrent

50N1-8 Instantaneous ResidualOvercurrent

51 1-8 Inverse Time Phase Overcurrent

51GW2,3,4 Inverse Time Ground Overcurrent

51N1-8 Inverse Time Residual Overcurrent

87 Phase Differential Current

87GDW2,3,4 Ground Differential

IPS IPSlogic

OPTIONAL FUNCTIONS DESCRIPTION

24 Volts per Hertz

27 Phase Undervoltage

59G Ground Overvoltage

81O/U Over/Under Frequency

Table 1-1 M-3311A Device Functions

Introduction – 1

1–3

The relay provides storage of time-tagged targetinformation for the 32 most recent trip events. Alsoincluded are self-test, self-calibration and diagnosticcapabilities. The M-3911A Target Module LEDs areused to provide a detailed visual indication of functionoperation for the most recent event.

The M-3311A retains up to 311 cycles of oscillographwaveform data assignable to up to 24 events withselectable post-trigger delay. This data can bedownloaded and analyzed using the M-3801D IPSplotTM

PLUS Oscillograph Analysis Software.

The unit is powered from a wide range switch modepower supply. An optional redundant power supply isavailable for units without the Expanded I/O. Whenexpanded I/O option is selected, the unit includesthe second power supply.

The M-3311A includes self-test, auto calibration,and diagnostic capabilities, in addition to IRIG-Btime-sync capability for accurate time-tagging ofevents.

Communication PortsThe M-3311A includes three physical communicationports. If the optional RJ45 Ethernet port is purchased,then the relay includes four physical communicationports:

• COM1, located on the relay front panel, isa standard 9-pin RS-232 DTE-configuredport. COM1 is used to locally set andinterrogate the relay using a portablecomputer.

• COM2, located on the rear of the relay, is astandard 9-pin RS-232 DTE-configured port.When the optional RJ45 Ethernet Port isenabled, COM2 port is disabled forcommunications. The demodulated IRIG-Bmay still be used via the COM2 Port whenethernet is enabled.

The RJ45 Ethernet port uses a 10Base-Ttype connection that accepts an RJ45connector using CAT5 twisted pair cable.The Ethernet port supports MODBUS overTCP/IP. The IP address can be obtainedautomatically when using the DHCP protocolif enabled, or a static IP address can bemanually entered, using the HMI.

• COM3, located on the rear terminal blockof the relay, is an RS-485 communicationsport.

The relay may be remotely set and interrogatedutilizing either a hard-wired RS-232 serial connectionor modem (COM2 when activated as RS-232, orCOM3), or when purchased, the ethernet connection(RJ45 activated).

Detailed information regarding the use of the relaycommunications ports is provided in Appendix B,Communications, as well as Chapter 3, IPScom® .

The system may be remotely set and interrogatedutilizing either a hard-wired RS-232 serial connectionor modem (COM2 when activated as RS-232, orCOM3), or when purchased, the ethernet connection(RJ45 activated).

M-3826 IPScom Communications SoftwareEach M-3311A unit includes the M-3826 IPScomCommunications Software. The IPScomcommunications software runs on an IBM PCcompatible computer running under Windows 95/98or greater, providing remote access to the relay usingeither direct serial connection or modem. IPScomprovides the following communication functions:

• Setpoint interrogation and modification

• Real-time metering and I/O statusmonitoring

• Stored target interrogation

• Recorded oscillographic datadownloading

• Real time Phasor display

See Chapter 3, IPScom for an overview of IPScomfeatures.


1–4

��

��

Figure 1-2 M-3931 Human-MachineInterface (HMI) Module

M-3801D IPSplot™Plus Oscillograph AnalysisSoftwareThe IPSplot™Plus Oscillograph Analysis Softwareruns in conjunction with IPScom software on anyIBM PC-compatible computer running Windows 95/98 or greater, to enable the plotting and printing ofwaveform data downloaded from the M-3311ATransformer Protection Relay.

M-3933/M-0423 Serial Communications CableThe M-3933 cable is a 10-foot straight-through RS-232modem cable for use between the relay’s rear-panel(COM2) port and a modem. This cable has a DB25(25-pin) connector (modem) and a DB9 (9-pin) at theM-3311A end.

The M-0423 cable is a 10-foot null-modem RS-232cable for direct connection between a PC and therelay’s front-panel COM1 port or the rear COM2 port.This cable has DB9 (9-pin) connectors at each end.

M-3949 Redundant Low Voltage Power SupplyRedundant 24/48 V dc supply (For Non-Expanded I/Ounits).

M-3948 Redundant High Voltage Power SupplyRedundant 110/250 V dc supply (For Non-ExpandedI/O units).

1.3 Accessories

M-3911A Target ModuleThe optional target module shown in Figure 1-1includes 24 individually labeled TARGET LEDs totarget the operation of the functions on the frontpanel. Eight individually labeled OUTPUT LEDs willbe illuminated as long as any output is picked up.

24 DT/IT OVEREXCITATION27 PHASE UV46 DT/IT NEG SEQ OC49 WINDING THERMAL50,50N #1,2 INST OC50,50N #3,4/50GW2 INST OC50,50N #5,6/50GW3 INST OC

51#1/51N#1 INV OC51#2/51N#2/51GW2 INV OC51#3/51N#3/51GW3 INV OC51#4/51N#4/51GW4 INV OC

BREAKER FAILURE 50BFGROUND OV 59GFREQUENCY 81 O/UGROUND DIFFERENTIAL 87 GDPHASE DIFFERENTIAL 87 T/HIPS LOGIC #1 IPS1IPS LOGIC #2 IPS2IPS LOGIC #3 IPS3IPS LOGIC #4 IPS4IPS LOGIC #5 IPS5IPS LOGIC #6 IPS6

TARGETS

OUTPUTSOUT 1 OUT 3 OUT 5 OUT 7

OUT 2 OUT 4 OUT 6 OUT 8

50,50N #7,8/50GW4 INST OC

Figure 1-1 M-3911A Target Module

M-3933/M-0423 Serial Communication CablesThe M-3933 cable is a 10-foot RS-232 cable for usebetween the M-3311A rear panel (COM2) port and amodem. This cable includes a DB25 (25-pin) connector(modem) and a DB9 (9-pin) at the relay end.

The M-0423 cable is a 10-foot null-modem RS-232cable for direct connection between a PC and theM-3311A front panel COM1 port, or the rear COM2port. This cable includes a DB9 (9-pin) connector ateach end.

M-3931 Human-Machine Interface (HMI) ModuleThe optional HMI module shown in Figure 1-2,provides a means to interrogate the relay and toinput settings, access data, etc. directly from thefront of the relay. Operation of the module is describedin detail in Section 2.1, Front Panel Controls andIndicators.

Operation – 2

2–1

2Operation

2.1 Front Panel Controls and Indicators ......................................... 2–1

2.2 Operation (HMI/PC) .................................................................... 2–4

This chapter contains information that describes theoperation of the M-3311A Transformer ProtectionRelay. See Chapter 4 for System Setup, Configurationand Setpoint information. M-3311A operation fromeither IPScom or HMI includes the following:

• Front Panel Controls and Indicators

• Status MonitoringVoltage, Current, Frequency andVolts/Hz MonitoringInput/Output StatusTimer StatusCounter Status (Input, Output,Alarm)Time of Last Power UpError CodesChecksum

• DemandDemand CurrentsMaximum Demand CurrentClear Maximum Demand Current

• Target HistoryView Target HistoryClear Target History

• Oscillograph RecorderView Recorder StatusRetrieve RecordsTrigger OscillographClear Records

• MiscellaneousSoftware VersionSerial NumberAlter User Access CodesClear Output CountersClear Alarm CountersReset CountersClear Error Codes

• Through Fault RecorderRetrieve RecordsView RecordsClear Records

• Sequence of Events RecorderRetireve RecordsView RecordsClear Records


2–2

2.1 Front Panel Controls andIndicators

This section describes the operation of the M-3311Aas a function of the M-3931 Human Machine InterfaceModule (HMI) and the M-3911A Target Module.

The M-3311A can be interrogated locally with theHMI panel. An integral part of the design is thelayout and function of the front panel indicators andcontrols, illustrated in Figure 2-1.

Alphanumeric DisplayThe HMI module consists of a 2 x 24-characteralphanumeric display. To assist the operator inoperating and interrogating the relay locally, the HMIdisplays menus which guide the operator to thedesired function or status value. These menus consistof two lines. The bottom line lists lower caseabbreviations of each menu selection with the chosenmenu selection shown in uppercase. The top menuline provides a description of the chosen menuselection.

Screen BlankingThe display will automatically blank after exitingfrom the Main Menu, or from any screen after five (5)minutes of unattended operation. To wake up thedisplay, the user must press any key except EXIT.

Arrow PushbuttonsThe left and right arrow pushbuttons are used tochoose among the displayed menu selections. Whenentering values, the left and right arrow pushbuttonsare used to select the digit (by moving the cursor) ofthe displayed setpoint that will be increased ordecreased by the use of the up and downpushbuttons.

The up and down arrow pushbuttons increase ordecrease input values or change between upper andlower case inputs. If the up or down pushbutton ispressed and held when adjusting numerical values,the speed of increment or decrement is increased.

If the up or down arrow pushbutton is held in thedepressed position when adjusting numerical values,the speed of the increment or decrement is increased,after a small delay.

EXIT PushbuttonThe EXIT pushbutton is used to exit from a displayedscreen and move up the menu tree. Any changedsetpoint in the displayed screen will not be saved ifthe selection is aborted using the EXIT pushbutton.

ENTER PushbuttonThe ENTER pushbutton is used to choose ahighlighted menu selection, to replace a setting orother programmable value with the currently displayedvalue, or to move down within the menu tree.

RELAY OK LEDThe Green RELAY OK LED is controlled by theunit's microprocessor. A flashing RELAY OK LEDindicates proper program cycling. The LED can alsobe programmed to be continuously illuminated toindicate proper program cycling.

Time Sync LEDThe green TIME SYNC LED illuminates to indicatethat the IRIG-B time signal is being received andvalidated.

Breaker Closed (BRKR CLOSED) LEDThe red BRKR CLOSED LED illuminates when thebreaker status input (52b) is open.

Diagnostic LED (DIAG)The diagnostic LED flashes upon the occurrence ofa detectable self-test error. The LED will flash theError Code Number. For example, for error code 32,the LED will flash 3 times, followed by a shortpause, and then 2 flashes, followed by a long pause,and then repeat. For units equipped with the HMI,the Error Code Number is also displayed on thescreen.

Operation – 2

2–3

Figure 2-1 M-3311A Front Panel

Power Supply (PS1) and (PS2) LEDsThe green power LED indicator (for the appropriatepower supply) will be illuminated whenever power isapplied to the unit and the power supply is functioningproperly. Power supply PS2 is available as an option,for units without expanded I/O.

Target LEDWhen a condition exists that causes the operation ofOutputs 1 through 8 (1 through 16 for units withexpanded I/O), the TARGET LED will illuminate,indicating a relay operation. The TARGET LED willremain illuminated until the condition causing thetrip is cleared, and the operator presses the TARGETRESET pushbutton.

Detailed information about the cause of the last 8operations is retained in the unit’s memory for accessthrough the alphanumeric display from the VIEWTARGET HISTORY menu.

M-3911A Target Module and Target ResetPushbuttonFor units equipped with the optional M-3911A TargetModule, additional targeting information is available.The Target module includes an additional 24 targetLEDs, and 8 output status LEDs. LEDs correspondingto the particular operated function as well as thepresent state of the outputs are available.

Pressing and holding the TARGET RESETpushbutton will display the present pickup status ofall functions available on the target module. This isa valuable diagnostic tool which may be used duringcommissioning and testing.

Detailed information about the cause of the last 32operations is retained in the unit’s memory for accessthrough the alphanumeric display from the VIEWTARGET HISTORY menu.


2–4

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2.2 Operation (HMI/PC)

The purpose of this section is to describe the stepsthat are necessary to interrogate the M-3311A utilizingeither the optional M-3931 HMI or a PC runningM-3826 IPScom® Communications software throughCOM1 the front RS-232 serial port. These instructionsassume that the following conditions exist:

• The unit is energized from an appropriatepower supply.

See Chapter 5, Installtion, Section 5.3,External Connections, for power supplyconnection details.

• For PC communications, IPScom isinstalled on the host PC.

See Chapter 5, Installtion, Section 5.6,IPScom Communications SoftwareInstallation, if IPScom is not installed.

• For PC communication, intital PCcommunication has been establised withthe unit.

If this is the first attempt to establishcommunications with the unit, then seeSee Chapter 5, Installtion, Section 5.7,Activating Initial Local Communications.

HMI Operation OverviewWhenever power is applied to the unit the Power OnSelf Test sequence is intitated (Figure 2-2).

Default Message ScreensWhen the M-3311A is energized and unattended,the user logo lines are blank.

If a protective function has operated and has notbeen reset, the HMI will display the target(s) withthe time and date of the operation and automaticallycycle through target screen for each applicable target.This sequence is illustrated in Figure 2-2.

In either case, pressing the ENTER pushbutton willbegin local mode operation by displaying the accesscode entry screen, or if access codes are disabled,the first level menu will be displayed (Figure 2-3).

HMI SecurityTo prevent unauthorized access to the relay functions,the relay includes the provision for assigning accesscodes. If access codes have been assigned, theaccess code entry screen will be displayed after ENTERis pressed from the default message screen. The relayis shipped with the access code feature disabled.

The relay includes three levels of access codes.Depending on the access code each level holds,users have varying levels of access to the relayfunctions.

Operation – 2

2–5

Figure 2-3 Main HMI Menu Flow

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2–6

To access the STATUS menu and begin monitoring,proceed as follows:

1. Press the ENTER pushbutton.

2. If Level Access is active, the following isdisplayed:

ENTER ACCESS CODE0

a. Input the required Access Code, thenpress ENTER.

b. If the proper Access Code has beenentered, the HMI will return:

LEVEL #(1,2 or 3)Access Granted!

VOLTAGE RELAYVOLT curr freq v/hz

c. Go to Step 4.

3. If Level Access is not Active, then thefollowing will be displayed:


4. Press the Right arrow pushbutton untilthe following is displayed:

STATUSconfig sys STAT dmd

5. Press the ENTER pushbutton, thefollowing will be displayed:

VOLTAGE STATUSVOLT curr freq v/hz

6. Press the Right or Left arrow pushbuttonuntil the desired parameter is selected(upper case), then press ENTER. TheHMI will display the selected parameter.

7. Press the ENTER pushbutton to movedown within the STATUS menu to thedesired category. To exit a specificcategory and continue to the next menucategory, press the EXIT pushbutton.

Level 3 Access: provides access to all M-3311Aconfiguration functions and settings.

Level 2 Access:provides access to read & changesetpoints, monitor status and view target history.

Level 1 Access: provides access to read setpoints,monitor status and view target history.

Each access code is a user defined 1 to 4 digitnumber. If the level 3 access code is set to 9999,the access code feature is disabled. When accesscodes are disabled, the access screens arebypassed. Access codes are altered by choosingthe ALTER ACCESS CODES menu under SETUPUNIT menu. (These codes can only be altered by alevel 3 user).

Status Monitoring (From Relay Front Panel)The HMI menu categories for monitored values are:

• Voltage Status (VA and V

G phase voltages)

• Current Status (Secondary)

Phase Currents, W1 — W4

Ground Current, W2 — W4

Restraint Current (PU), Phase A/B/C

Differential Current Fund. (PU), Phase A/B/C

Differential Current (PU), 2nd, 4th and 5thHarmonic

Ground Differential Current, W2 — W4

Positive Sequence Current, W1 — W4

Negative Sequence Current, W1 — W4

Zero Sequence Current, W1 — W4

Function 49 Thermal Current, Phase A/B/C

• Frequency Status

• Volts/Hz Status

• I/O Status (Input and Output Contacts)

• Trip Circuit Monitor

• Timer Status

• Counter Status (Input, Output, Alarm)

• Time of Last Power up

• Error Codes

• Checksums (Setpoints, Calibration, ROM)

Operation – 2

2–7

Status Monitoring (From IPScom®)

PRIMARY METERING AND STATUSTo access the PRIMARY METERING AND STATUSparameters utilizing IPScom, select Monitor/PrimaryMetering and Status from the IPScom Main Screendrop down menu. IPScom will display the PrimaryMetering & Status dialog screen (Figure 2-4) whichincludes the following PRIMARY parameters:

• Voltage (VA and V

G phase voltages)

• Frequency (Hz)

• Volts Per Hertz (%)

• Current (W1 — W4)

• Ground Current (W2 — W4)

• Positive Sequence Current (W1 — W4)

• Negative Sequence Current (W1 — W4)

• Zero Sequence Current (W1 — W4)

• Differential Current (PU), (Phase A/B/C)

• Restraint Current (PU), (Phase A/B/C)

• Ground Differential Current (W2 — W4)

Also included on the Primary Metering & Statusscreen are:

• Inputs

• Outputs

• Breaker Status

• OSC Triggered Status

• Targets

• Aux Voltage

Path: Monitor / Primary Metering & Status

Figure 2-4 Primary Metering & Status Screen


2–8

SECONDARY METERING AND STATUSTo access the SECONDARY METERING ANDSTATUS parameters utilizing IPScom®, selectMonitor/Secondary Metering and Status from theIPScom Main Screen drop down menu.

Monitor/Secondary Metering and StatusThe Secondary Metering & Status screen (Figure2-5) includes the following SECONDARY parameters:


G phase voltages)

• Frequency (Hz)










Also included on the Secondary Metering & Statusscreen are:

• Inputs

• Outputs

• Breaker Status


• Targets

• Aux Voltage

Path: Monitor / Secondary Metering & Status

Figure 2-5 Secondary Metering & Status Screen

Operation – 2

2–9

• Breaker Monitor Accumulators (Phase A/B/C) Winding 1, 2, 3, & 4 A Cycles

• Demand Phase Currents, Winding 1, 2, 3,& 4

• Demand Ground Currents, Winding 2, 3, &4

• Cumulative Through Currents (kA2 Cycles)

• Through Fault Counter

Demand StatusMonitored Primary Demand values include:

• Winding 1, 2, 3, & 4 Phase Currents

• Winding 2, 3, and 4 Ground Current

Maximum Demand CurrentMaximum values include time-tagged values for allthe above quantities.

METERING IITo access the METERING II parameters utilizingIPScom®, select Monitor/ Metering II from theIPScom Main Screen drop down menu.

Monitor/Metering IIThe Metering II screen (Figure 2-6) includes thefollowing parameters:

• 2nd, 4th and 5th Harmonic DifferentialCurrents (PU), (Phase A/B/C)

• Thermal Currents (Phase A/B/C) for W1 orW2 or W3 or W4

Also included on the Metering II screen are:

NOTE: These parameters are described in theirrespective sections of this chapter.

Path: Monitor / Metering ll

Figure 2-6 Metering II Screen


2–10

Demand IntervalTime integrated primary metering values, based onthe chosen demand integration interval (15 min, 30min, or 60 min), as well as the time-tagged peakreading are available for viewing.

Demand (From Relay Front Panel)The HMI menu items for Demand are:

• Demand Currents

• Demand Interval (See Chapter 4, SystemSetup and Setpoints)

• Maximim Demand Current

• Clear Maximum Demand Current

To access the DEMAND CURRENTS, proceed asfollows:



ENTER ACCESS CODE0





c. Go to Step 4.




DEMANDconfig sys stat DMD


DEMAND STATUSSTAT int mstat clear

6. Press ENTER. The HMI will display W1Demand Phase Current.

W1 DEMAND PHASE CURRENT X.XX X.XX X.XX A

7. Press the ENTER pushbutton to viewW2, W3 and W4 Demand Phase Currentvalues. To exit a specific winding andcontinue to the next DEMAND CURRENTmenu category, press the EXITpushbutton.

To access the MAXIMUM DEMAND CURRENT,proceed as follows:



ENTER ACCESS CODE0





c. Go to Step 4.

3. If you are already in the DEMANDSTATUS menu, then go to Step 5.







Operation – 2

2–11


MAXIMUM DEMAND STATUSstat int MSTAT clear

8. Press ENTER. The HMI will display thefollowing:.

W1 MAX IA X.XXX AmpDD-MM-YYYY hh:mm:ss

9. Continuing to press the ENTERpushbutton will display the "B" and "C"Phase Values for W1 and then displaythe W2, W3 and W4 values.

To exit a specific winding and continue tothe next DEMAND CURRENT menucategory, press the EXIT pushbutton.

To access the CLEAR MAXIMUM DEMANDCURRENT, proceed as follows:



ENTER ACCESS CODE0





c. Go to Step 5.

3. If you are already in the DEMANDSTATUS menu, then go to Step 5.








CLEAR MAXIMUM DEMANDstat int mstat CLEAR


CLEAR MAXIMUM DEMANDPRESS ENTER KEY TO CLEAR


CLEAR MAXIMUM DEMAND— MAX VALUES CLEARED —

To exit a specific winding and continue tothe next DEMAND CURRENT menucategory, press the EXIT pushbutton.


2–12

The Demand Status dialog screen also includes thecapabilty to reset individual or reset all Max DemandStatus values.

VIEW TARGET HISTORYDetailed information about the cause of the last 32operations is retained in the unit’s memory for accessthrough the alphanumeric display from the VIEWTARGET HISTORY menu.

To access the VIEW TARGET HISTORY feature,proceed as follows:



ENTER ACCESS CODE0


Demand Status (From IPScom®)Demand CurrentsTo display Demand Currents select Monitor/Metering II. IPScom will display the Metering IIscreen (Figure 2-6). The Metering II screen includesthe following Demand Currents:



Max Demand StatusTo display Max Demand Status values selectSystem/Demand Status. IPScom will display theDemand Status screen (Figure 2-7).

The Demand Status screen includes the followinginformation:

• Max Demand Current values for Winding1, 2, 3, & 4 Phase Currents

• Max Demand Current values for Winding2, 3, and 4 Ground Current

• Date and Time of each Max Phase currentevent

Path: System / Demand Status

Figure 2-7 Demand Status Screen

Operation – 2

2–13




c. Go to Step 4.




VIEW TARGET HISTORYTARGETS osc_rec comm


VIEW TARGET HISTORYTRGT clear


VIEW TARGET HISTORYX Target Number

7. Pressing the Up or Down arrow pushbuttonmoves to the next target. Detailed targetinformation will then be dispalyed untilthe next target is selected.

8. To exit press the EXIT pushbutton. Thedisplay will return to the following:


To access the CLEAR TARGET HISTORY feature,proceed as follows:



ENTER ACCESS CODE0





c. Go to Step 4.




VIEW TARGET HISTORYTARGETS osc_rec comm




VIEW TARGET HISTORYtrgt CLEAR


VIEW TARGET HISTORY— TARGETS CLEARED —

8. To exit press the EXIT pushbutton.


2–14

View Target History (From IPScom®)View TargetsTo View Targets select System/Targets/View.IPScom will display the View Targets screen (Figure2-8). The View Targets screen includes the followingtarget information:

• Target Number

• Target Date/Time



• Active Functions

• Function Status (Picked up/Operated)

• Active Inputs and Outputs

The View Targets screen also includes the ability toSave the target information to file and Print thetarget information.

Clear TargetsTo Clear Targets perform the following:

1. Select System/Targets/Clear. IPScomwill display the Clear Targets confirmationdialog screen (Figure 2-9).

Figure 2-9 Clear Targets Confirmation DialogScreen

Path: System / Targets / View

Figure 2-8 View Targets Screen

Operation – 2

2–15

2. Select Yes. IPScom® will display theClear Targets dialog screen (Figure 2-10).

Figure 2-10 Clear Targets Dialog Screen

3. Select OK. IPScom will return to theMain screen.

Oscillograph Recorder DataThe Oscillograph Recorder provides comprehensivedata recording (voltage, current, and status input/output signals) for all monitored waveforms (at 16samples per cycle). Oscillograph data can bedownloaded using the communications ports to anyIBM compatible personal computer running theM-3826 IPScom Communications Software. Oncedownloaded, the waveform data can be examinedand printed using the optional M-3801D IPSplot®

PLUS Oscillograph Data Analysis Software.

▲ CAUTION: Oscillograph records are not retainedif power to the relay is interrupted.

The general information required to complete theinput data of this section includes:

• Recorder Partitions: When untriggered,the recorder continuously records waveformdata, keeping the data in a buffer memory.The recorder's memory may be partitionedinto 1 to 24 partitions.

When triggered, the time stamp is recorded,and the recorder continues recording for auser-defined period. The snapshot of thewaveform is stored in memory for laterretrieval using IPScom CommunicationsSoftware. The OSC TRIG LED on the frontpanel will indicate a recorder operation(data is available for downloading).

• Trigger Inputs and Outputs: The recordercan be triggered remotely through serialcommunications using IPScom, orautomatically using programmed statusinputs or outputs.

• Post-Trigger Delay: A post-trigger delayof 5% to 95% must be specified. Aftertriggering, the recorder will continue to storedata for the programmed portion of thetotal record before re-arming for the nextrecord. For example, a setting of 80% willresult in a record with 20% pretrigger data,and 80% post-trigger data.

Windings1, 2

311

207

155

124

103

89

Windings1, 2, 3

231

154

92

77

66

Windings1, 2, 3, 4

183

91

73

61

52

122

115

77

69

62

56

51

47

57

51

42

38

35

45

36

33

30

28

40

46

44

41

38

36

34

32

33

30

27

25

24

26

22

21

20

19

24

28

31

29

28

27

25

24

23

22

20

19

18

18

16

15

15

14

17

21

Number ofPartitions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

Table 2-1 Recorder Partitions

NOTE: Oscillograph recorder settings are notconsidered part of the Setpoint Profile.Recorder settings are common to allprofiles.

NOTE: Oscillograph Recorder Setup (See Chapter4, System Setup and Setpoints)


2–16

To access the Oscillograph Recorder VIEWRECORDER STATUS feature, proceed as follows:



ENTER ACCESS CODE0





c. Go to Step 4.




OSCILLOGRAPH RECORDERtargets OSC_REC comm


VIEW RECORDER STATUSSTAT clear setup

6. Press ENTER. The HMI will cycle throughand display the following for each activerecord :

RECORD #1 ACTIVEdd-mmm-yyyy hh:mm:ss:ms

For those records that are not active thefollowing will be displayed:

RECORD #1--RECORD CLEARED--



To access the Oscillograph Recorder CLEARRECORDS feature, proceed as follows:



ENTER ACCESS CODE0





c. Go to Step 4.







6. Press the right arrow pushbutton until thefollowing is displayed:

VIEW RECORDER STATUSstat CLEAR setup

Operation – 2

2–17


CLEAR RECORDS-RECORDS CLEARED-


VIEW RECORDER STATUSstat CLEAR setup

Oscillograph Recorder (From IPScom)NOTE: Oscillograph Recorder Setup (See Chapter

4, System Setup and Setpoints)

Retrieve Oscillograph RecordsTo retrieve Oscillograph Records perform thefollowing:

1. Select System/Oscillograph/Retrieve.IPScom® will display the RetrieveOscillograph Record dialog screen (Figure2-11).

2. Select the desired oscillograph record.

3. Select the desired File Format, then selectRetrieve, IPScom will display the SaveAs dialog screen.

4. Input the desired File Name and location,then select Save. IPScom will displaythe Download Status screen (Figure 2-12).

Path: System / Oscillograph / Retrieve

Figure 2-11 Retrieve Oscillograph Record Dialog Screen

Figure 2-12 Oscillograph Record DownloadDialog Screen

5. Upon completion of the oscillograph filedownload, IPScom will display theDownload Successful confirmation screen(Figure 2-13).

Figure 2-13 Oscillograph DownloadSuccessful Confirmation Screen

6. Select OK, IPScom will return to theMain screen.


2–18

Trigger OscillographTo manually Trigger the Oscillograph perform thefollowing:

1. Select System/Oscillograph/Trigger.IPScom® will display the TriggerOscillograph confirmation screen (Figure2-14).

Figure 2-14 Trigger OscillographConfirmation Screen

2. Select Yes, IPScom will display theOscillograph Successfully TriggeredDialog Screen.(Figure 2-15)

Figure 2-15 Oscillograph SuccessfullyTriggered Dialog Screen


Clear Oscillograph RecordsTo Clear Oscillograph Records perform the following:

1. Select System/Oscillograph/Clear.IPScom will display the Clear OscillographRecords confirmation screen (Figure2-16).

Figure 2-16 Clear Oscillograph RecordsConfirmation Screen

2. Select Yes, IPScom will display the ClearOscillograph Records Successfull DialogScreen.(Figure 2-17)

Figure 2-17 Oscillograph SuccessfullyCleared Records Dialog Screen


Operation – 2

2–19

Software Version (Relay Front Panel only)To determine the software version installed on therelay, proceed as follows:



ENTER ACCESS CODE0





c. Go to Step 4.




SETUP UNIT SETUP


SOFTWARE VERSIONVERS eth sn access


SOFTWARE VERSIOND-0179VXX.YY.ZZ AAAA


Serial Number (Relay Front Panel only)To determine the serial number of the relay, proceedas follows:



ENTER ACCESS CODE0





c. Go to Step 4.




SETUP UNIT SETUP




SERIAL NUMBERvers eth SN access


SERIAL NUMBER XXXXXXXXXX



2–20

Alter Access Codes (From Relay Front Panel)1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.

3. If Level Access is not active, then thefollowing is displayed:



SETUP UNITstat comm SETUP

5. If User Access Codes are to be set, thenuse the RIGHT arrow pushbutton to selectALTER ACCESS CODES. The followingwill be displayed:

ALTER ACCESS CODESvers eth sn ACCESS

6. Press ENTER, the following will bedisplayed:

ENTER ACCESS CODELEVEL#1 level#2 level#3


LEVEL #19999

8. Input the desired User Access Code asfollows:

a. Utilizing the Up and Down arrowpushbuttons select the desired firstdigit.

b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desiredAccess Code.

c. When the desired Access Code hasbeen input, then press ENTER. Thefollowing will be displayed:


9. To set User Access Code Level #2 pressthe RIGHT arrow pushbutton to selectLEVEL #2, then press ENTER thefollowing will be displayed:

LEVEL #29999

10. Repeat Step 8 to enter the desired Level#2 User Access Code.


LEVEL #39999


13. Press the EXIT pushbutton will return tothe previous selection screen:

ALTER ACCESS CODESvers sn ACCESS number

Operation – 2

2–21

Alter User Access Codes (From IPScom®)Comm Access CodesTo set the relay Comm Access Code perform thefollowing:

NOTE: Communication must be established withthe target relay for this procedure.

1. From the IPScom Main Screen menuselect Tools/Security/Change CommAccess Code. IPScom will display theChange Comm Access Code dialogscreen (Figure 4-1).

Figure 2-18 Change Comm Access CodeDialog Screen

2. Enter the desired New Comm AccessCode (1-9999), then re-enter (confirmation)the New Access Code.

3. Select Save, IPScom will display a CommAccess Code change Confirmation Screen(Figure 2-19).

Figure 2-19 Comm Access Code ChangeConfirmation Screen

4. Select Yes, IPScom will display anAccess Code Was Changed SuccessfullyConfirmation Screen (Figure 2-20).

Figure 2-20 Access Code ChangedConfirmation Screen

5. Select OK, ISScom will return to theMain Screen.

The new Comm Access Code will not bein affect until communications have beenclosed with the relay for approximately2.5 minutes.

User Access CodesThe relay includes three levels of access codes.Depending on their assigned code, users have varyinglevels of access to the installed functions.

1. Level 1 Access = Read setpoints,monitor status, view status history.

2. Level 2 Access = All of level 1privileges, plus read & changesetpoints, target history, set time clock.

3. Level 3 Access = All of level 2privileges, plus access to allconfiguration functions and settings.

Each access code is a user-defined one-to four-digitnumber. Access codes can only be altered by alevel 3 user.

If the level 3 access code is set to 9999, the accesscode feature is disabled. When access codes aredisabled, the access screens are bypassed, and allusers have full access to all the relay menus. Thedevice is shipped from the factory with the accesscode feature disabled.


2–22

User Access CodesTo change the relay User Access Codes perform thefollowing:


1. From the IPScom® Main Screen menuselect Tools/Security/Change UserAccess Code. IPScom will display theChange User Access Code dialog screen(Figure 2-21).

Figure 2-21 Change User Access Code DialogScreen

2. Enter the desired New User Access Code(1-9999), then re-enter (confirmation) theNew User Access Code.

3. Select Save, IPScom will display a UserAccess Code change Confirmation Screen(Figure 2-19).

4. Select Yes, IPScom will display anAccess Code Was Changed SuccessfullyConfirmation Screen (Figure 2-20).


System Error Codes, Output and AlarmCountersThe System Error Codes, Output and Alarm Countersfeature provides the user with the ability to view andclear system Error Codes, Processor Resets, AlarmCounters, Power Loss Counter and Output Counters.Also, Checksums can be viewed (IPScom) forCalibration and Setpoints.

Clear Output Counters (Relay Front Panel)To clear Output Counters from the Front Panelperform the following:



ENTER ACCESS CODE0





c. Go to Step 4.




SETUP UNIT SETUP



Operation – 2

2–23


CLEAR OUTPUT COUNTERlogo1 logo2 OUT alrm


CLEAR OUTPUT COUNTERSPRESS ENTER KEY TO CLEAR


CLEAR ALARM COUNTER-OUT COUNTERS CLEARED-

9. Press EXIT as necessary to return to themain menu.

Clear Alarm Counters (Relay Front Panel)To clear Alarm Counters from the Front Panel performthe following:



ENTER ACCESS CODE0





c. Go to Step 4.




SETUP UNIT SETUP


SOFTWARE VERSIONVERS sn access number


CLEAR OUTPUT COUNTERlogo1 logo2 out ALRM


CLEAR ALARM COUNTERSPRESS ENTER KEY TO CLEAR


CLEAR ALARM COUNTER-ALARM COUNTERS CLEARED-


Clear Error Codes (Relay Front Panel)To clear Error Codes from the Front Panel performthe following:



ENTER ACCESS CODE0





c. Go to Step 4.




2–24


SETUP UNIT SETUP




CLEAR ERROR CODEStime ERROR diag


CLEAR ERROR CODESPRESS ENTER KEY TO CLEAR


CLEAR ERROR CODES-ERROR CODES CLEARED-


Resetting Counters (From IPScom)Tools/Counters and Error CodesTo view and/or Reset System Error Codes andOutput Counters utilizing IPScom® perform thefollowing:


1. From the IPScom Main Screen menu barselect Tools/Counters and Error Codes.IPScom will display the System ErrorCodes and Output Counters dialog screen(Figure 2-22).

2. Select the desired Error Code, AlarmCounter, Power Loss Counter to be reset,then select OK. IPScom will return to theMain Menu.

Figure 2-22 Counters and Error Codes Dialog Screen

Operation – 2

2–25

Through Fault Recorder (From IPScom®)System/Through Fault/RetrieveTo download available Through Fault records performthe following:

1. From the IPScom Main Screen menuselect System/Through Fault/Retrieve.

The Through Fault Download screen willdisplay a bar indicating the status of thedownload. When the download is completethe Save As screen will be displayed witha default “.tfe” file extension.

3. Select the destination folder and namethe file, then select Save to save theThrough Fault Record or Cancel.

System/Through Fault/ViewTo view available Through Fault records perform thefollowing:

1. From the IPScom Main Screen menuselect System/Through Fault/View.IPScom will display the View ThroughFault Record screen (Figure 2-23).

2. Select Open. IPScom will display theOpen screen with a default “.tfe” fileextension.

3. Select the location of the “.tfe” files, thenselect the file to be viewed.

4. Select Open. IPScom will Open the targetfile in the View Through Fault Recordscreen.

5. Select Close to return to the IPScomMain screen.

Figure 2-23 View Through Fault Record Screen


2–26

System/Through Fault/ClearTo Clear the relay Through Fault records performthe following:

1. From the IPScom® Main Screen menuselect System/Through Fault/Clear.IPScom will display the Clear ThroughFault record confirmation screen (Figure2-24).

Figure 2-24 Clear Through Fault RecordConfirmation Screen

2. Select YES, IPScom will respond withthe Through Fault Record ClearedSuccessfully screen (Figure 2-25).

Figure 2-25 Through Fault Record ClearedSuccessfully Screen

3. Select OK, IPScom will return to theIPScom Main Screen.

System/Sequence of Events/RetrieveThe Retrieve selection downloads the events fromthe currently connected relay (events must beretrieved from the relay and stored in a file in order toview them).

To download available Sequence of Events performthe following:

1. From the IPScom Main Screen menuselect System/Sequence of Events/Retrieve. IPScom will display theSequence of Events Recorder Downloadscreen (Figure 2-26) and indicate thenumber of Sequence of Events RecorderEvents being downloaded.

Figure 2-26 Sequence of Events Retireve/Download Screen

2. When the download is complete the SaveAs screen will be displayed with a default“.evt” file extension.

3. Select the destination folder and namethe file, then select Save to save theSequence of Events Record or Cancel.

Operation – 2

2–27

Figure 2-27 View Sequence of Events Record Screen

System/Sequence of Events/ViewThe Sequence of Events viewer screen includes thecommands Open, Close, Print Summary, andPrintl. Open opens a saved sequence of eventsfile. Close closes the print file. Print Summaryprints an event summary, and Print prints the eventreport. Clear deletes event history from the control.

To view available Sequence of Events Recordsperform the following:

1. From the IPScom Main Screen menuselect System/Sequence of Events/View. IPScom will display the ViewSequence of Events Record screen(Figure 2-27).

2. Select Open. IPScom will display theOpen screen with a default “.evt” fileextension.

3. Select the location of the “.evt” files, thenselect the file to be viewed.

4. Select Open. IPScom will Open the targetfile in the View Sequence of EventsRecord screen (Figure 2-27).

System/Sequence of Events/ClearThe Clear feature clears all Sequence of EventsRecords stored on the relay.

To Clear all Sequence of Events Records performthe following:

1. From the IPScom Main Screen menuselect System/Sequence of Events/Clear. IPScom will display the ClearSequence of Events Records confirmationscreen (Figure 2-28).

Figure 2-28 Clear Sequence of Events RecordCommand Confirmation Screen

2. Select YES, IPScom will respond withthe Sequence of Events Records Clearedconfirmation Screen (Figure 2-29).

Figure 2-29 Sequence of Events RecordCleared Confirmation Screen

3. Select OK, IPScom will return to theIPScom Main Screen.


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IPScomTM – 3

3–1

3IPScom®

3.1 IPScom Functional Description ................................................. 3–1

This chapter is designed for the person or groupresponsible for the operation and setup of theM-3311A. The M-3826 IPScom CommunicationsSoftware can be used to successfully communicatesystem settings and operational commands to theM-3311A as well as access the extensive monitoringand status reporting features. Figure 3-3, representsthe IPScom Main Screen menu structure. Thischapter provides a general overview of each IPScommenu selection and command in the same order asthey are displayed in the software program. ThoseIPScom features and functions that are covered inother sections of this Instruction Book will be notedand referenced.

3.1 IPScom FunctionalDescription

The IPScom installation and establishing initiallocal communications are covered in Section 5.6,IPScom Communications Software Installation, andSection 5.7, Activating Initial LocalCommunications.

Selecting the IPScom Program from the BecowareFolder or selecting the IPScom Program Icon (Figure3-1) from the Desktop will open the program anddisplay the IPScom Main Screen (Figure 3-2).

Figure 3-1 IPScom Program Icon

IPScom Main Screen Menu BarThe IPScom Main Screen Menu Bar includes (whenthe program is initially opened) the File, Connectand Help menu selections. This menu bar includesthe additional selections; Communication,Monitor, System, Tools and Windows whenIPScom is in either the file mode or has opencommunications established with a relay.

Shortcut Command ButtonsBefore IPScom has entered either the file mode orcommunications have been opened, the new andopen shortcut commands are available. WhenIPScom is in the New File, Existing File, orCommunication Mode, the main screen includesthe Save, Secondary Metering, Phasor Diagramand Setpoints shortcut command buttons. Theseshortcuts allow direct access to these functions.

IPScom Main Screen Status LineThe IPScom status line indicates the source of theinformation that is displayed. Sources include NewFile, Existing File, Serial Port, TCP/IP or Modem.Also included on the IPScom Main Screen at thebottom, are the Type of Unit IPScom is connectedto, the Firmware Version of the unit and Status ofthe Communication connection, or if not connected,it will indicate that IPScom is in the File Mode.


3–2

Figure 3-2 IPScom Main Screen

IPScomTM – 3

3–3

File

Connected

Unconnected

SaveSave AsClose

NewOpen

EXIT

Connect/Communication

ConnectCommunication

DisconnectOpen TerminalWindow

Serial PortTCP/IPModem

MonitorPrimary Metering & StatusSecondary Metering & StatusMetering IIPhasor DiagramPhasor Diagram (F87T)Pickup/Timeout Status87T Dual Slope

Tools

SecurityUser InformationRelay CommunicationOutput TestCounter & Error Codes

Change Comm Access CodeChange User Access Code

Change Communication AddressSetup Comm PortSetup Ethernet

HelpContentsAbout

WindowsCascadeTile VerticalTile HorizontalArrange Icons

RelaySetupDemand StatusTargetsThrough FaultSequence of EventsOscillographProfileWrite File to RelayRead Data from Relay

Relay SetpointsConfigurationExpanded I/OSetup Date & TimeDisplay I/O MapDisplay All Setpoints

ViewClearReset LED

RetrieveNewClear

SetupRetrieveViewClear

SetupRetrieveTriggerClear

Switching MethodSelect ProfileCopy Active Profile

Figure 3-3 M-3826 IPScom Menu Selection


3–4

File/Open CommandThe open command allows opening a previouslycreated data file. With an opened data file, use theSystem... Setup... menu items to access thesetpoint windows.

If communication can be established with a relay, itis always preferred to use the Read Data FromSystem command in the System menu to updatethe PC’s data file with the relay data. This file nowcontains the proper system type information,eliminating the need to set the information manually.

File/Close CommandCloses the open file without saving.

File/Exit CommandThe Exit command quits the IPScom program.

Connect\Communication Menu

The Connect dialog screens allow selection of theIPScom communication parameters to coordinatewith the relay. Selecting “Serial Port” displays the PCComm Port and device Settings (Figure 3-5). Selecting“TCP/IP” displays the PC TCP/IP and device Settings(Figure 3-6) for Ethernet communication. Selecting“Modem” displays a modem Dialog screen (Figure3-7), to establish contact with remote locations. TheModem Dialog screen also includes a “Bring upterminal window after dialing” option. When selectedIPScom will open a terminal window (Figure 3-8) toallow modem commands to be sent to the targetmodem. When communicating by way of a fiber opticloop network, echo cancelling is available by checkingthe Echo Cancel box. This command masks thesender’s returned echo.

If the modem was not used to establish communication(direct connection), select Connect to start. If therelay has a default communication access code of9999, a message window will be displayed showingAccess Level #3 was granted. Otherwise, anotherdialog screen will be displayed to prompt the user toenter the access code in order to establishcommunication.Communication/Disconnectdiscontinues communication.

Communication\Open Terminal WindowOpens the IPScom Terminal Window (Figure 3-8).

File Menu

The File menu enables the user to create a newdata file, open a previously created data file, close,save and save as. The IPScom® program can alsobe exited through the File menu.

File/New CommandWhen not connected to the M-3311A, using theNew command, a new file is established with theNew System dialog screen (Figure 3-4). SelectingSave allows the new data file to be named by usingthe Save or Save As... commands.

NOTE: By choosing the NEW command, unitand setpoint configuration values arebased on factory settings.

Path: File menu / New command

Figure 3-4 New System Dialog Screen

COMMAND BUTTONS

OK Allows the file to be created using thecurrently displayed information.

Cancel Returns to the IPScom main screen;any changes to the displayedinformation are lost.

File/Save and Save As CommandThe Save and Save As... commands allow savinga file or renaming a file, respectively.

IPScomTM – 3

3–5

Figure 3-6 IPScom TCP/IP Ethernet Communication Dialog Screen

Figure 3-5 IPScom Serial Communication Dialog Screen


3–6

Figure 3-8 Terminal Window

Figure 3-7 IPScom Modem Communication Dialog Screen

IPScomTM – 3

3–7

Path: Monitor / Primary Metering and Status

Figure 3-9 Primary Metering Status Screen

Monitor MenuThe Monitor Menu provides access to the screensused to monitor relay parameters. Seven submenusare provided: Primary Metering and Status,Secondary Metering and Status, Metering II,Phasor Diagram, Phasor Diagram (87T), Pickup/Timeout Status, and 87T Dual Scope.

Monitor/Primary Metering & StatusThe Primary Metering screen (Figure 3-9) allowsthe user to review the following PRIMARYparameters:


G phase voltages)

• Frequency (Hz)










Also included on the Primary Metering & Statusscreen are:

• Inputs

• Outputs

• Breaker Status


• Targets

• Aux Voltage


3–8

Monitor/Secondary Metering & StatusThe Secondary Metering and Status screen (Figure3-10) allows the user to review the followingSECONDARY parameters:


G phase voltages)

• Frequency (Hz)










Also included on the Secondary Metering & Statusscreen are:

• Inputs

• Outputs

• Breaker Status


• Targets

• Aux Voltage

Path: Monitor / Secondary Metering and Status

Figure 3-10 Secondary Metering Status Screen

IPScomTM – 3

3–9

• Demand Ground Currents, Winding 2, 3, &4

• Cumulative Through Currents (kA2 Cycles)

• Through Fault Counter

Demand StatusMonitored Primary Demand values include:



Maximum Demand CurrentMaximum values include time-tagged values for allthe above quantities.

Monitor/Metering IIThe Metering II screen (Figure 3-11) includes thefollowing parameters:

• 2nd, 4th and 5th Harmonic DifferentialCurrents (PU), (Phase A/B/C)

• Thermal Currents (Phase A/B/C) for W1or W2 or W3 or W4

Also included on the Metering II screen are:

NOTE: These parameters are described in theirrespective sections of this chapter.

• Breaker Monitor Accumulators (Phase A/B/C) Winding 1, 2, 3, & 4 A Cycles

• Demand Phase Currents, Winding 1, 2, 3,& 4

Path: Monitor / Metering ll

Figure 3-11 Metering II Screen


3–10

Monitor/Phasor DiagramThe Phasor Diagram (Figure 3-12) provides theuser with the ability to evaluate a reference PhaseAngle to Phase Angle data from other windings.The Phasor Diagram also includes a menu thatallows the user to select/deselect sources to bedisplayed and Freeze capability to freeze the datadisplayed on the Phasor Diagram.

Path: Monitor / Phasor Diagram

NOTE: When connections specifying delta-connected CTs are used, Functions 87T and 87H use thePhasor Diagram values (currents actually entering the relay) and not the calculated valuesdisplayed on the Secondary Metering and status screen.

Figure 3-12 Phasor Diagram

IPScomTM – 3

3–11

Monitor/Phasor Diagram (F87T)The Phasor Diagram (F87T) (Figure 3-13) providesthe user with the ability to evaluate compensatedand uncompensated 87 Function parameters.

Path: Monitor / Phasor Diagram (F87T)

Figure 3-13 Phasor Diagram (F87T)


3–12

Path: Monitor / Pickup/Timeout Status

Figure 3-14 Pickup/Timeout Status

Monitor/Pickup/Timeout StatusThe Pickup/Timeout Status screen (Figure 3-14)displays the extended status information of relayfunctions and Input/Output contact information.

Monitor/87T Dual SlopeThe 87T Dual Slope display allows the user todisplay a graphical representation of the 87Tprogrammable Dual Slope Percentage RestraintCharacteristic. See Section 4.4, System Setpointsfor detailed information.

Path: Monitor / 87TDual Slope

Figure 3-15 87T Function Dual Slope Display

IPScomTM – 3

3–13

Relay/Setup/ConfigurationThe Configuration selection displays theConfiguration System dialog screen (Figure 3-16)allowing the user to input the pertinent informationregarding the system on which the relay is applied(see Section 4.2, Configuration, for detailedinformation regarding the specific elements of theConfiguration dialog screen).

NOTE: Checking the inputs for the Active InputOpen parameter designates the“operated” state established by anopening rather than a closing externalcontact.

COMMAND BUTTONS

Save When connected to a relay, sends thecurrently displayed information to theunit. Otherwise, saves the currentlydisplayed information to file andreturns to the IPScom Main screen.

Cancel Returns to the IPScom Main screen;any changes to the displayedinformation are lost.

Figure 3-16 M-3826 IPScom Configuration Dialog Screen

Relay Menu

The Relay menu provides access to the screensused to set, monitor, or interrogate the relay. Sixsubmenus are provided: Setup, Demand Status,Targets, Through Fault, Sequence of Events,Oscillograph and Profile as well as two commands,Write File to Relay, and Read Data From Relay.

Relay/Setup

The Setup submenu includes the Configuration,Relay Setpoints Expanded I/O, Set Date &Time,Display I/O Map and Display All Setpointsselections.


3–14

Figure 3-18 Example Function Dialog Screen

COMMAND BUTTONS

Save When connected to a relay, sends the currently displayed information to the unit. Otherwise, savesthe currently displayed information and returns to the System Setpoints screen or All SetpointsTable.

Cancel Returns to the System Setpoints screen or All Setpoints Table; any changes to the displayedinformation are lost.

Figure 3-17 Relay Setpoints Dialog Screen

COMMAND BUTTONS

Display All Opens the All Setpoints Table dialog screen for the specified range of functions.

I/O Configure Opens the I/O Map dialog screen (Figure 3-21)

OK Exits the screen and returns to the IPScom® main screen.

Relay/Setup/Relay SetpointsThe Relay Setpoints menu selection displays theRelay Setpoints dialog screen (Figure 3-17) fromwhich the individual Function Setting dialog screenscan be accessed. Selecting a Function Settingbutton will display the corresponding function dialogscreen (See Figure 3-18 as an example).

IPScomTM – 3

3–15

Relay/Setup/Expanded I/OThe Expanded I/O feature under Relay/Setup allowsthe user to enable/disable extended I/O if the unit isso equipped.

Figure 3-19 Expanded I/O Enable/DisableScreen

Relay/Setup/Set Date & TimeThe Setup Date & Time command (Figure 3-20)allows the system date and time to be set, orsystem clock to be stopped. This dialog screenalso displays an LED mimic to identify when theTime Sync is in use (preventing date/time frombeing changed by user).

The time field in the dialog box is not updatedcontinuously. The time at which the dialog box wasopened is the time that is displayed and remains assuch. This is true whether the relay is synchronizedwith the IRIGB signal or not.

There is a green Time Sync LED mimic in thisdialog box (the LED is displayed as different shadingon a monochrome monitor). When this LED is

green, the relay is synchronized with the IRIG-Bsignal and the Time field is grayed out, indicatingthat this field can’t be changed. But the Date fieldcan be changed (by editing and selecting Save).

When the LED is not blue, the relay is not time-synchronized and therefore, both the Date andTime fields can be changed.

Path: System/ Setup Date & Time

Figure 3-20 Date/Time Dialog Screen

SETUP DATE AND TIME COMMAND BUTTONS

Start/Stop This toggles between start/stop, theClock relay clock. ‘Stop’ pauses, ‘Start’

resumes.

Save Saves Time and Date settings to therelay when applicable.

Cancel Returns to the IPScom main window.Any changes to the displayedinformation is lost.


3–16

Relay/Setup/Display/I/O MapSelecting the I/O Map button displays the I/O Mapdialog screen (Figure 3-21), which contains a chartof programmed input and output contacts, in orderto allow scrolling through all relay output and blockinginput configurations.

Both the Relay Setpoints dialog screen and the I/OMap screen include the Display All Setpoints featureand Jump Command Buttons which allow the user tojump from a scrolling dialog screen to an individualrelay function dialog screen and return to the scrollingdialog screen. All available parameters can bereviewed or changed when jumping to a relay I/OMap screen from either scrolling dialog screen.

Figure 3-21 I/O Map Screen

IPScomTM – 3

3–17

Figure 3-22 Display All Setpoints Screen

Relay/Setup/Display All SetpointsSelecting the Display All Setpoints button displaysthe All Setpoints dialog screen (Figure 3-22). Thisdialog screen contains the settings for each relayfunction within a single window to allow scrollingthrough all relay setpoint and configuration values.

The individual Feature and Function selectionbuttons are described in the applicable sections.

The All Setpoint Table includes Jump CommandButtons which allow the user to jump from a scrollingdialog screen to an individual relay function dialogscreen and return to the scrolling dialog screen. Allavailable parameters can be reviewed or changedwhen jumping to a configuration dialog screen.


3–18

Figure 3-23 Demand Status Dialog Screen

Relay/Demand StatusThe Demand Status feature allows the user toaccess Primary Demand Values. See Chapter 2,Operation for detailed information.

IPScomTM – 3

3–19

Figure 3-24 View Targets Dialog Screen

Relay/Targets The Targets submenu provides three commandoptions: View, Clear and Reset LED. The Viewcommand displays Target dialog (see Figure 3-24,View Targets Dialog Screen). This dialog boxprovides detailed data on target events includingtime, date, function status, phase current values,and IN/OUT contact status at the time of trip.Individually recorded events may be selected withinthe dialog box and saved into a text file, or beprinted out with optional added comments. TheReset LED is similar to pushing the Target Resetbutton on the relay itself. This command resetscurrent target displayed on the relay. This commanddoes not reset any target history. The Clearcommand clears all stored target history. SeeChapter 2, Operation for detailed information.


3–20

Figure 3-25 View Through Fault Record Screen

Relay/Through Fault The Through Fault submenu provides threecommand options: Retrieve, View and Clear. TheRetrieve command initiates the retrieval of anyThrough Faults present in the relay. The Viewcommand displays the View Through Fault Recorddialog screen (Figure 3-25). This screen providesdetailed information about each Through Fault record.The information includes the Record Serial Number,Start Time, Duration, Fault Current, Max Currentand Phase. The submenu also includes the Clearcommand which clears all Through Fault records inthe relay. See Chapter 4, System Setup andSetpoints and Chapter 2, Operation, for detailedinformation.

IPScomTM – 3

3–21

Relay/Sequence of Events

Figure 3-26 Sequence of Events Recorder Setup Screen

Figure 3-27 Sequence of Events Recorder Retrieve Screen

The Sequence of Events submenu allows the userto Setup, Retrieve, View and Clear Sequence ofEvents records. The Setup command displays theSetup Sequence of Events Recorder dialog screen(Figure 3-26). Function Pickup, Trip and Drop canbe selected to initiate the recorder as well as InputPickup, Output Pickup, Inputs Drip and OutputsDrip. The Retrieve command downloads and savesthe record to file (Figure 3-27). The View commanddisplays the View Sequence of Events Recordscreen (Figure 3-28) which allows the user to openand print Sequence of Events files. The Clearcommand clears all Sequence of Events records inthe relay. See Chapter 4, System Setup andSetpoints and Chapter 2, Operation, for detailedinformation.


3–22

Figure 3-28 View Sequence of Events Recorder Screen

IPScomTM – 3

3–23

Relay/Oscillograph

Figure 3-29 Setup Oscillograph Recorder Dialog Screen

Figure 3-30 Oscillograph Recorder Retrieve Dialog Screen

The Oscillograph submenu allows setting andcontrol over the relay’s oscillograph recorder. TheSetup command allows the user to set the numberof partitions and triggering designations to be made(Figure 3-29), Retrieve downloads and save data toa file (Figure 3-30). Trigger sends a command tothe realy to capture a waveform. This is the sameas issuing a manual oscillograph trigger. Clearerases all existing records. The optional M-3801DIPSplot®PLUS Oscillograph Analysis Softwareprogram is required to view the downloadedoscillograph files.

See Chapter 4, System Setup and Setpoints andChapter 2, Operation, for detailed information.


3–24

Relay/Profile

CAUTION: If relay is online, be sure to switch theactive profile. If the wrong profile is selected, itmay cause unexpected operation.

Figure 3-31 Profile Switching Method Dialog Screen

Figure 3-32 Select Profile Dialog Screen

Figure 3-33 Copy Active Profile Dialog Screen

The Profile submenu provides three commandoptions: Switching Method, Select Profile, andCopy Active Profile.

Switching Method command allows selection ofeither Manual or Input contact (Figure 3-31). SelectProfile allows user to designate active profile(Figure 3-32). Copy Active Profile copies activeprofile to one of four profiles (user should allowapproximately 15 seconds for copying) (Figure3-33).

See Chapter 4, System Setup and Setpoints fordetailed information.

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Relay/Write File to Relay

The Write File to Relay command sends apredefined setpoint data file to the Relay.

Relay/Read Data From RelayThe Read Data from Relay command updates thePC data image with the relay’s latest data.

Tools Menu

The Tools menu provides the user with access toIPScom® relay support features and functions.

Tools/SecurityThe Security menu item includes the ChangeComm Access and Change User Access codesubmenus.

Tools/Security/ Change Comm Access CodeThe Change Comm Access code selection displaysthe Change Comm Access Code screen (Figure3-34) which allows the user to change the CommAccess Code. See Section 4.1, Unit Setup fordetailed setup instructions.

If additional link security is desired, a communicationaccess code can be programmed. Like the useraccess codes, if the communication access codeis set to 9999 (default), communication security isdisabled.


Tools/Security/Change User Access CodeThe Change User Access Code selection displaysthe Change User Access Code screen (Figure3-35) which allows the user to change the relayUser Access Code. See Section 4.1, Unit Setupfor detailed setup instructions.

The relay includes three levels of access codes.Depending on their assigned code, users havevarying levels of access to the installed functions.


2. Level 2 Access = All of level 1privileges, plus read & changesetpoints, target history, set timeclock.


Each access code is a user-defined one-to four-digit number. Access codes can only be altered bya level 3 user.

If the level 3 access code is set to 9999, theaccess code feature is disabled. When accesscodes are disabled, the access screens arebypassed, and all users have full access to all therelay menus. The device is shipped from the factorywith the access code feature disabled.



3–26

Tools/User InformationThe User Information menu selection displays theUser Information screen (Figure 3-36) which providesthe user with the ability to edit/input the User Logolines of the HMI display, enter/edit the User ControlNumber and set the operating mode of the SystemOK LED. See Section 4.1, Unit Setup for detailedsetup instructions.

Figure 3-36 User Information Screen

Tools/User Information/User Logo LineThe user logo is a programmable, two-line by24-character string, which can be used to identifythe relay, and which is displayed locally duringpower up after Self Test completion. This informationis also available in IPScom.

User Control NumberThe User Control Number is a user-defined valuewhich can be used for inventory or identification.The unit does not use this value, but it can beaccessed through the HMI or the communicationsinterface, and can be read remotely.

System OK LEDThe green SYSTEM OK LED is controlled by theunit's microprocessor. A flashing SYSTEM OKLED indicates proper program cycling. The LEDcan also be programmed to be continuouslyilluminated.

Tools/Relay CommunicationThe Relay Communication menu selection providesthe user with the ability to change the relayCommunication Address (Figure 3-37), set therelay’s COM Port communication parameters (Figure3-38) and setup the Ethernet Port (Figure 3-39).See Section 4.1, Unit Setup for detailedcommunication setup instructions.

Figure 3-37 Change Relay CommunicationAddress Dialog Screen

Figure 3-38 Setup Relay Comm Port DialogScreen

Figure 3-39 Setup Relay Ethernet Port DialogScreen

IPScomTM – 3

3–27

Figure 3-40 Output Test Dialog Screen

Figure 3-41 Counters and Error Codes Dialog Screen

Tools/Output TestThe Output Test menu selection displays the OutputTest screen (Figure 3-40) which provides the userwith the ability to test each ouput relay. See Section6, Testing for detailed testing instructions.

Tools/Counters and Error CodesThe Counters and Error Codes menu selectiondisplays the Counters and Error Codes screen(Figure 3-41) which provides the user with theability to view and clear system Error Codes, AlarmCounters, Power Loss Counter and Output Counters.Also, Checksums can be viewed for Calibrationand Setpoints. See Chapter 2, Manual Operationfor detailed instructions.


3–28

Window Menu

The Window menu enables positioning andarrangement of IPScom® windows so that there isbetter access to available functions. This featureallows the display of several windows at the sametime. Clicking on an inactive yet displayed windowactivates that window.

Help Menu

The Help menu provides four commands. TheContents command initiates a link to a PDF(Portable Document File) version of this instructionbook for easy reference. An Adobe Acrobat® readeris required to view this document.

The M-3311A Instruction Book has been indexed toits table of contents. By selecting the ‘Navigatorpane’ in Adobe Acrobat Reader, the user can directlyaccess selected topics.

Using Help is currently unavailable, and will appeargreyed-out in display. The About command displaysIPScom version and development information. ProfileInfo displays user information for input and editing.

4–1

System Setup and Setpoints – 4

4 System Setup and Setpoints

4.1 Unit Setup ................................................................................... 4–1

4.2 Configuration ............................................................................. 4–24

4.3 System Diagrams ..................................................................... 4–30

4.4 System Setpoints ..................................................................... 4–33

4.5 System Applications and Logic Schemes .............................. 4–70

4.6 Transformer Connections ......................................................... 4–75

Chapter four is designed for the person or groupresponsible for the Unit Setup, Configuration andSystem Setpoints of the M-3311A TransformerProtection Relay.

Chapter 4 consists of:

• Functional and connection diagrams for atypical application of the relay.

• The Unit Setup Section, which consistsof general unit setup information,Communications setup, Oscillograph,Sequence of Events, Through FaultRecorder and Demand Interval setup.

• The Configuration Section provides thedefinitions of system quantities andequipment characteristics required by therelay which include CT, VT configurationselection and Input and Outputassignments.

• A System Setpoints Section whichdescribes the unit transfer settings,enabling functions and setpoints, outputcontact assignments and digital inputassignments.

The selection of the M-3311A System Setupparameters and Setpoints can be performed usingeither the M-3826 IPScom® CommunicationsSoftware from the unit’s M-3931 Front Panel HumanMachine Interface (HMI), and will be included whereapplicable.

4.1 Unit Setup

■ NOTE: Setup Record Forms are contained inAppendix A. The Setup Record Formtables list the relay parameter settingschoices for each feature and function.

GENERAL UNIT SETUP

The General Unit setup consists of the setup of thefollowing features and functions:

• Comm Access Code

• User Access Codes

• User Logo Lines

• User Control Number

• OK LED Flash

• Time and Date

COMM ACCESS CODE

If additional link security is desired, a communicationaccess code can be programmed. Like the useraccess codes, if the communication access codeis set to 9999 (default), communication security isdisabled.

4–2


IPScom Comm Access Code SetupTo set the relay Comm Access Code perform thefollowing:

■ NOTE: Communication must be established withthe target relay for this procedure.

To set the relay Comm Access Code perform thefollowing:


1. From the IPScom Main Screen menuselect Tools/Security/Change CommAccess Code. IPScom will display theChange Comm Access Code dialogscreen (Figure 4-1).


2. Enter the desired New Comm AccessCode (1-9999), then re-enter(confirmation) the New Access Code.

3. Select Save, IPScom will display aComm Access Code changeConfirmation Screen (Figure 4-2).

Figure 4-2 Comm Access Code ChangeConfirmation Screen

4. Select Yes, IPScom will display anAccess Code Was ChangedSuccessfully Confirmation Screen(Figure 4-3).

Figure 4-3 Access Code ChangedConfirmation Screen


The new Comm Access Code will not bein affect until communications have beenclosed with the relay for approximately2.5 minutes.

HMI Comm Access Code Setup1. Press the ENTER pushbutton.

2. If Level Access is active, the followingis displayed:

ENTER ACCESS CODE0





c. Go to step 4.




COMMUNICATIONstat COMM setup

4–3



COM1 SETUPCOM1 com2 com3 com_adr


COMM ACCESS CODEACCSS eth eth_ip


COMM ACCESS CODE9999

8. Input the desired Comm Access Codeas follows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired CommAccess Code digits.

c. When the desired Comm Access Codehas been input, then press ENTER.The following will be displayed:

COMM ACCESS CODEACCESS eth eth_ip

9. Press Exit.

IPScom User Access Code SetupThe relay includes three levels of access codes.Depending on their assigned code, users havevarying levels of access to the installed functions.


2. Level 2 Access = All of level 1privileges, plus read & changesetpoints, target history, set timeclock.


Each access code is a user-defined one-to-fourdigit number. Access codes can only be altered bya level 3 user.

If the level 3 access code is set to 9999, theaccess code feature is disabled. When accesscodes are disabled, the access screens arebypassed, and all users have full access to all therelay menus. The device is shipped from the factorywith the access code feature disabled.

Setup User Access CodesTo setup the relay User Access Codes perform thefollowing:


1. From the IPScom Main Screen menuselect Tools/Security/Change UserAccess Code. IPScom will display theChange User Access Code dialog screen(Figure 4-4).


2. Enter the desired User Access Code

(1-9999), then re-enter (confirmation) thedesired User Access Code.

3. Select Save, IPScom will display a UserAccess Code change ConfirmationScreen (Figure 4-2).

4. Select Yes, IPScom will display anAccess Code Was ChangedSuccessfully Confirmation Screen(Figure 4-3).

5. Select OK, IPScom will return to theMain Screen.

4–4


HMI User Access Codes Setup1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.





5. If User Access Codes are to be set,then use the RIGHT arrow pushbutton toselect ALTER ACCESS CODES. Thefollowing will be displayed:





LEVEL #19999

8. Input the desired User Access Code asfollows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired AccessCode.

c. When the desired Access Code hasbeen input, then press ENTER. Thefollowing will be displayed:



LEVEL #29999



LEVEL #39999


13. Press the EXIT pushbutton will return tothe previous selection screen:


4–5


USER LOGO LINE

The user logo is a programmable, two-line by24-character string, which can be used to identifythe relay, and which is displayed locally when theunit is idle. This information is also available inIPScom®.

USER CONTROL NUMBER

This is a user-defined value which can be used forinventory or identification. The unit does not use thisvalue, but it can be accessed through the HMI or thecommunications interface, and can be read remotely.

SYSTEM OK LED

The green SYSTEM OK LED is controlled by theunit's microprocessor. A flashing SYSTEM OK LEDindicates proper program cycling. The LED canalso be programmed to be continuously illuminated.

IPScom User Logo Line, User control Numberand System OK LED SetupTo set the relay User Logo Line, User ControlNumber and System OK LED perform the following:


1. From the IPScom Main Screen menuselect Tools/User Information. IPScomwill display the User Information dialogscreen (Figure 4-5).

Figure 4-5 User Information Dialog Screen

2. If entering/editing the User Logo lines,then enter the desired User Logo Lines.

3. If changing the User Control Number,then enter the desired User ControlNumber.

4. If enabling/disabling the System OK LEDFlash operation, then select eitherEnable of Disable.

5. Select Save, IPScom will return to theMain Screen.

HMI User Logo Line Setup1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.








USER LOGO LINE 1LOGO 1 logo 2 alrm


USER LOGO LINE 1_BECKWITH ELECTRIC CO.

4–6


8. Input the desired User Logo Line 1 asfollows:

a. Utilizing the Up and Down arrowpushbuttons select the desired firstletter/symbol/digit/blank space.

b. Press the Right arrow pushbutton once,then repeat the previous step asnecessary to input the desired UserLogo Line 1.

c. When the desired User Logo Line 1has been input, then press ENTER.The following will be displayed:

USER LOGO LINE 1—WAIT—

USER LOGO LINE 1LOGO 1 logo 2 alrm

9. To enter a User Logo Line 2 press theRIGHT arrow pushbutton once, thefollowing will be displayed:

USER LOGO LINE 2logo 1 LOGO 2 alrm


USER LOGO LINE 2_ M-3311A

11. Input the desired User Logo Line 2 asfollows:

a. Utilizing the Up and Down arrowpushbuttons select the desired firstletter/symbol/digit/blank space.

b. Press the RIGHT arrow pushbuttononce, then repeat the previous step asnecessary to input the desired UserLogo Line 2.

c. When the desired User Logo Line 2has been input, then press ENTER.The following will be displayed:

USER LOGO LINE 2—WAIT—

USER LOGO LINE 2logo 1 LOGO 2 alrm

12. Press Exit.

HMI User Control Number Setup1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.








USER CONTROL NUMBERvers sn access NUMBER


USER CONTROL NUMBER1

4–7


8. Input the desired User Control Numberas follows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired UserControl Number.

c. When the desired User Control Numberhas been input, then press ENTER.The following will be displayed:

USER CONTROL NUMBERvers sn access NUMBER

9. Press Exit.

HMI System OK LED Setup1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.



▲▲▲▲▲ CAUTION: Do not enter DIAGNOSTIC MODEwhen protected equipment is in service. EnteringDIAGNOSTIC MODE when protected equipment isin service removes all protective functions of therelay.

4. Press the right arrow pushbutton untilthe following is displayed:

SETUP UNIT stat comm SETUP



6. Press the right arrow pushbutton untilthe following is displayed:

DIAGNOSTIC MODE time error eth DIAG

7. Press ENTER, the following warning willbe displayed:

PROCESSOR WILL RESET!ENTER KEY TO CONTINUE

▲▲▲▲▲ CAUTION: Do not enter DIAGNOSTIC MODEwhen protected equipment is in service. EnteringDIAGNOSTIC MODE when protected equipment isin service removes all protective functions of therelay.

8. Press ENTER, the relay will reset andDIAGNOSTIC MODE will be temporarilydisplayed followed by:

OUTPUT TEST (RELAY)OUTPUT input led module


FLASH SYS OK LEDcom3 clock LED cal


FLASH SYS OK LEDoff ON

4–8


11. Utilizing the Right or Left arrowpushbuttons select either ON or OFF.


FLASH SYS OK LED–DONE–


FLASH SYS OK LEDcom3 clock LED cal

14. Press EXIT, the following will bedisplayed:

PRESS EXIT TOEXIT DIAGNOSTIC MODE

15. Press EXIT, the unit will cycle throughthe Power Self Tests.

SYSTEM CLOCK

This feature allows the user to set the relay internalclock. The clock is used to time stamp systemevents and oscillograph operations.

The clock is disabled when shipped from the factory(indicated by “80” seconds appearing on the clock)to preserve battery life. If the relay is to beunpowered for an extended length of time, theclock should be stopped (from Diagnostic Mode orIPScom Figure 4-6). If the IRIG-B interface is used,the hours, minutes, and seconds information in theclock will be synchronized with IRIG-B timeinformation every hour.

The relay can accept a modulated IRIG-B signalusing the rear panel BNC connector, or ademodulated TTL level signal using extra pins onthe rear panel COM2 RS-232 interface connector(see Figure B-4 for COM2 pinout.) If the TTL signalis to be used, then Jumper 5 will be required to bepositioned (see Section 5.5, Circuit Board Switchesand Jumpers).

IPScom Set Date/TimeTo set the relay Date/Time perform the following:


1. From the IPScom Main Screen menuselect System/Setup/Setup Date &Time. IPScom will display the SetupDate/Time dialog screen (Figure 4-6).

Figure 4-6 Setup Date/Time Dialog Screen

2. Enter the desired Date and/or Time.

3. Select SAVE, IPScom will return to theMain Screen.

HMI SET DATE and TIME1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.



4–9


4. Press the RIGHT arrow pushbutton untilthe following is displayed:


5. Press ENTER, then press the RIGHTarrow pushbutton until the following isdisplayed:

DATE & TIME TIME error eth diag


DATE & TIME08-Jan-2001 00:00:80


DATE & TIME 01 Year

8. Input the desired Year as follows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired Year.

c. When the desired Year has been input,then press ENTER. The following willbe displayed:

DATE & TIMEJAN feb mar apr may

9. Input the desired Month as follows:

a. Utilizing the Right or Left arrowpushbuttons select the desired Month.

b. When the desired Month has beenselected, then press ENTER. Thefollowing will be displayed:

DATE & TIME8 Date

10. Input the desired Date as follows:

a. Utilizing the Up and Down arrowpushbuttons select the desired Datefirst digit.

b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired date.

c. When the desired Date has been input,then press ENTER. The following willbe displayed:

DATE & TIMESUN mon tue wed thu

11. Input the desired Day as follows:

a. Utilizing the Right or Left arrowpushbuttons select the desired Day.

b. When the desired Day has beenselected, then press ENTER. Thefollowing will be displayed:

DATE & TIME 01 Hour

12. Input the desired Hour as follows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired Hour.

c. When the desired Hour has been input,then press ENTER. The following willbe displayed:

DATE & TIME 13 Minutes

13. Input the desired Minutes as follows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desiredMinute(s).

c. When the desired Minutes have beeninput, then press ENTER. The followingwill be displayed:

DATE & TIME 16 Seconds

14. Input the desired Seconds as follows:


4–10


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desiredSeconds.

c. When the desired Seconds have beeninput, then press ENTER. The followingwill be displayed:

DATE & TIME TIME error eth diag

COMMUNICATION SETUP

Communication setup can be accomplished utilizingeither IPScom® or the HMI. The Communicationsetup consists of the setup of the following featuresand functions:

• COM Port definitions and Device Address

• Ethernet Port Settings

• Installing Modems

Serial Ports (RS-232)Two serial interface ports, COM1 and COM2, arestandard 9-pin, RS-232, DTE-configured ports. Thefront-panel port, COM1, can be used to locally setand interrogate the relay using a temporaryconnection to a PC or laptop computer. The secondRS-232 port, COM2, is provided at the rear of theunit. COM2 is unavailable for communications whenthe optional ethernet port is enabled. However, theDemodulated IRIG-B may still be used through theCOM2 Port when Ethernet is enabled.

Serial Port (RS-485)COM3 located on the rear terminal block of theM-3311A is an RS-485, 2-wire connection. AppendixB, Figure B-3 illustrates a 2-wire RS-485 network.

Individual remote addressing also allows forcommunications through a serial multidrop network.Up to 32 relays can be connected using the same 2wire RS-485 communications line.

Direct ConnectionIn order for IPScom to communicate with the relayusing direct serial connection, a serial “null modem”cable is required, with a 9-pin connector (DB9P) forthe system, and an applicable connector for thecomputer (usually DB9S or DB25S). Pin-outs for anull modem adapter are provided in Appendix B,Communications.

An optional 10 foot null modem cable (M-0423) isavailable from the factory, for direct connectionbetween a PC and the relay’s front panel COM port,or the rear COM2 port.

When fabricating communication cables, every effortshould be made to keep cabling as short aspossible. Low capacitance cable is recommended.The RS-232 standard specifies a maximum cablelength of 50 feet for RS-232 connections. If over 50feet of cable length is required, other technologiesshould be investigated.

Other communication topologies are possible usingthe M-3311A Transformer Proetection System. AnApplication Note, “Serial Communication withBeckwith Electric’s Integrated Protection SystemRelays” is available from the factory or from ourwebsite at www.beckwithelectric.com.

Device AddressIndividual relay Device Addresses should be between1 and 255. The default Device Address is 1.

IPScom COM Port Definitions and System’sCommunication AddressTo setup the COM Ports and CommunicationAddresses perform the following:


1. From the IPScom Main Screen menuselect Tools/Relay Communcation.IPScom will display the Setup CommPort dialog screen (Figure 4-7).

The System COM Port that is in use willbe indicated at the top of the display.

Figure 4-7 Setup Comm Port Dialog Screen

4–11


2. Select the desired COM Port to be setup(1, 2 or 3).

3. Enter the desired “Baud Rate” (1200 to9600). COM2 and COM3 share the samebaud rate (see Section 5.5, CircuitBoard Switches and Jumpers).

4. Enter the desired “Parity” (None, odd oreven).

5. Enter the desired “Stop Bits” value (1 or2).

Baud Rate Dead-Sync Time

9600 4 ms

4800 8 ms

2400 16 ms

1200 32 ms

Table 4-1 Dead-Sync Time

6. Enter the desired communicationsProtocol (MODBUS, 2179, DNP3.0).

7. Enter the desired “System’sCommunication Address” (1 to 255).

The individual addressing capability ofIPScom and the relay allows multiplesystems to share a direct or modemconnection when connected throughCOM2 using a communications-linesplitter (Figure 4-8). One such deviceenables 2 to 6 units to share onecommunications line. Appendix B, FigureB2 illustrates a setup of RS-232 FiberOptic network.

8. Enter the desired “Dead Sync Time” (2to 3000 msec).

This delay establishes the line idle timeto re-sync packet communication. Deadsync time should be programmed basedon the channel’s baud rate.

9. When the COM Port settings have beenentered, then select Save. IPScom willdisplay the COM Port Settings WarningScreen (Figure 4-2).

10. Select OK, IPScom will return to theMain Screen.

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Figure 4-8 Setup Comm Port Dialog Screen

4–12


HMI COM Port Definitions and Device Address1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.




Communicationstat COMM setup



6. Press ENTER and the following isdisplayed:

COM1 BAUD RATEbaud_4800 BAUD_9600

7. Press the Left or Right arrow pushbuttonas necessary to select the desired baudrate.

8. Press ENTER. If setting up COM1, thescreen will return to the beginning of theComm menu. If setting up COM2 or 3,the following will be displayed:

COM2 DEAD SYNC TIME50 ms

9. Input the desired Dead Sync Time asfollows:


b. Press the Left arrow pushbutton once,then repeat the previous step asnecessary to input the desired DeadSync Time.

c. When the desired Dead Sync Timehas been input, then press ENTER.The following will be displayed:

COM2 PROTOCOLbeco 2200 modbus dnp3

10. Utilizing the Left and Right arrowpushbuttons, select the desired protocol,then press ENTER. The following willbe displayed:

COM2 PARITYNONE odd even

11. Press the Left or Right arrow pushbuttonas necessary to select the desiredParity setting.


COM2 STOP BITS1

13. Util izing the Up or Down arrowpushbuttons select the desired StopBits.


COM1 SETUPcom1 COM2 com3 com_adr

15. Selecting COM 3 will activate the samemenu choices as displayed with theselection of COM1/2. Repeat asnecessary to setup the remaining COMPorts.

4–13


ETHERNET COMMUNICATION SETTINGS

The optional RJ45 ethernet port can be enabledutilizing either IPScom® from the Ethernet Settingsmenu or from the HMI Communication menu. Whenthe ethernet port is enabled the COM2 Serial Port isnot available for communications. The demodulatedIRIG-B may still be used via the COM2 Port whenethernet is enabled.

The following parameters must be set for properethernet communication:

DHCP PROTOCOL

ENABLE: If the network server supports the DHCPprotocol the network server will assign the IPAddress, Net Mask and Gateway Address.

DISABLE: If the network server does not supportthe DHCP protocol or the user chooses to manuallyinput ethernet settings, then obtain the IP Address,Net Mask and Gateway address from the NetworkAdministrator and enter the settings.

ETHERNET PROTOCOLS

SERCONV:To utilize the BECO2200 protocol overa TCP/IP connection select the SERCONV(BECO2200 TCP/IP) protocol. The IP Address ofthe relay must be entered in the IPScomCommunication screen. Also, ensure that the COM2protocol is selected to BECO2200 and the baudrate is set to 9600 bps.

The Standard Port Number for the BECO2200 overTCP/IP protocol is 8800. The master device mayrequire the entry of the Standard Port Number.

MODBUS:To utilize the MODBUS protocol over aTCP/IP connection select the MODBUS (MODBUSover TCP/IP) protocol. The IP Address of the relaymust be entered in the IPScom® Communicationscreen. Also, ensure that the COM2 protocol isselected to MODBUS, baud rate is set to 9600 bps,1 stop bit and no parity selected.

The Standard Port Number for the MODBUS overTCP/IP protocol is 502. The master device mayrequire the entry of the Standard Port Number.

IPScom Ethernet Port Setup with DHCP■ NOTE: Communication must be established with

the target MBTS for this procedure.

1. From the IPScom Main Screen menuselect Tools/Ethernet Setup. . IPScomwill display the Setup Ethernet screen(Figure 4-9).

Figure 4-9 Setup Ethernet Screen

2. Select Ethernet Enable.

3. Select DHCP Protocol Enable.

4. Select the desired protocol.

5. Select Save. The ethernet board is nowconfigured for use and may be accessedthrough a network.

4–14


6. Ensure that TCP is selected (UpperCase).

If TCP is not selected (Upper Case),then use the Right/Left arrowpushbuttons to select TCP.


DHCP PROTOCOLDISABLE enable

8. If the network does not support the DHCPprotocol, then go to Manual Configurationof Ethernet Board (following page) tomanually configure the ethernet board.

9. If the DHCP Protocol is to be enabled,then use the Right/Left arrow pushbuttonto select ENABLE (Upper Case), thenpress ENTER, the following will bedisplayed:

TCP/IP SETTINGSTCP prot

10. Ensure that PROT is selected (UpperCase).

If PROT is not selected (Upper Case),then use the Right arrow pushbutton toselect PROT.


SELECT PROTOCOLmodbus serconv

12. Use the Right/Left arrow pushbuttons toselect the desired protocol (Upper Case),then press ENTER, the following will bedisplayed:

TCP/IP SETTINGStcp PROT

13. Press EXIT, the ethernet board willreconfigure and the following will bedisplayed:

CONFIGURING ETH...

IPScom® Ethernet Port Setup without DHCP■ NOTE: Communication must be established with

the target relay for this procedure.

1. From the IPScom Main Screen menuselect Tools/Ethernet Setup. . IPScomwill display the Ethernet Setup screen(Figure 4-9).

2. Select Ethernet Enable.

3. Select DHCP Protocol Disable.

4. Enter values for IP Address, Net Maskand Gateway.

5. Select the desired protocol.

6. Select Save. The ethernet board is nowconfigured for use and may be accessedthrough a network.

HMI Ethernet Port Setup1. Ensure that the Communication Menu is

selected to COMM (upper case).

COMMUNICATION targets osc_rec COMM

If COMM is not selected (Upper Case),then use the Right/Left arrowpushbuttons to select COMM.



3. Use the Right arrow pushbutton to selectETH (Upper Case).

ETHERNET SETUP access ETH eth_ip


ETHERNETDISABLE enable

5. Use the Right arrow pushbutton to selectENABLE (Upper Case), then pressENTER, the following will be displayed:

TCP/IP SETTINGSTCP prot

4–15


5. Enter the desired Gateway, then pressENTER, the following will be displayed:

TCP/IP SETTINGStcp prot

6. Ensure that PROT is selected (UpperCase).

If PROT is not selected (Upper Case),then use the Right arrow pushbutton toselect PROT.


SELECT PROTOCOLmodbus serconv

8. Use the Right/Left arrow pushbuttons toselect the desired protocol (Upper Case),then press ENTER, the following will bedisplayed:

TCP/IP SETTINGStcp PROT

9. Press EXIT, the ethernet board willreconfigure and the following will bedisplayed:

CONFIGURING ETH...

If the ethernet board is successfullyconfigured, then the entered IP Addresswill be displayed for approximately 2seconds:

ETHERNET IP ADDRESSXX.XX.XX.XX

The ethernet board is now configured foruse and may be accessed through anetwork.

If the ethernet board successfully obtainsan IP Address the following will bedisplayed for approximately 2 seconds:

ETHERNET IP ADDRESSXX.XX.XX.XX

The ethernet board is now configured foruse and may be accessed through anetwork.

Then the display will return to thefollowing:

ETHERNET SETUP access ETH eth_ip

If the ethernet board fails to obtain an IPAddress within 15 seconds the followingwill be displayed (for approximately 2seconds):

CONFIGURING ETH...

ETH BOARD ERROR

Contact the Network Administrator todetermine the cause of the configurationfailure.

Manual Configuration of Ethernet Board1. Ensure that DISABLE is selected (Upper

Case).

If DISABLE is not selected (Upper Case),then use the Left arrow pushbutton toselect DISABLE.


IP ADDRESSXX.XX.XX.XX

3. Enter the desired IP Address, then pressENTER, the following will be displayed:

NET MASKXX.XX.XX.XX

4. Enter the desired Net Mask, then pressENTER, the following will be displayed:

GATEWAYXX.XX.XX.XX

4–16


INSTALLING THE MODEMS

Using IPScom® to interrogate, set or monitor therelay using a modem requires both a remote modemconnected at the relays location and a local modemconnected to the computer with IPScom installed.

■■■■■ NOTE: Any compatible modem may be used;however, the unit only communicates at1200 to 9600 baud.

In order to use IPScom to communicate with therelay using a modem, the following must be providedwith the relay:

• An external modem (1200 baud or higher),capable of understanding standard ATcommands.

• Serial modem cable with 9-pin connectorfor the relay and the applicable connectorfor the modem.

Similarly, the computer running IPScom must alsohave access to a compatible internal or externalmodem.

Connecting the PC Modem1. If the computer has an external modem,

then use a standard straight-throughRS-232 modem cable (M-3933) toconnect the computer to the modem.

2. If the computer has an internal modem,then refer to the modem’s instructionbook to determine whichcommunications port should be selected.

3. Verify that the modem is attached to (ifexternal) or assigned to (if internal) thesame serial port as assigned in IPScom.

While IPScom can use any of the 255serial ports (COM1 through COM255),most computers support only COM1 andCOM2.

4. Connect the modem to a telephone line,then energize the modem.

Initializing the PC Modem1. Verify that the modem is connected as

described in “Connecting the PC Modem”.

2. Open IPScom, then select the Connect/Modem menu item.

Figure 4-10 Modem Dialog Screen

4–17


3. IPScom will display the Modem Dialogscreen (Figure 4-10).

4. Enter the required information in theModem Settings section of the screen,then select Connect.

COMMAND BUTTONS

Add Allows you to review and change theuser lines (unit identifier), phonenumber, and communication addressof a selected entry.

Remove Deletes a selected entry.

Save Saves any changes to the displayedinformation

Connect Dials the entry selected from thedirectory.

Cancel Ends modem communication, allowingthe user to dial again.

Connecting the Local Modem to the RelaySetup of the modem attached to the relay may beslightly complicated. It involves programmingparameters (using the AT command set), and storingthis profile in the modem’s nonvolatile memory.

After programming, the modem will power up in theproper state for communicating with the relay.Programming may be accomplished by using the“Bring Up Terminal Window after dialing” selection(Figure 4-11). Refer to your modem manual forfurther information.

■■■■■ NOTE: The relay does not issue or understandany modem commands. It will not adjustthe baud rate and should be considered a“dumb” peripheral. It communicates with1 start, 8 data, and 0, 1 or 2 stop bits.

Connect the Modem to the relay as follows:1. Connect the unit to an external modem

by attaching a standard RS-232 modemcable to the appropriate serialcommunications port on both the unitand the modem.

2. Connect the modem to a telephone line,then energize the modem.

The modem attached to the relay must have thefollowing AT command configuration:

E0 No Echo

Q1 Don’t return result code

&D3 On to OFF DTR, hangup and reset

&S0 DSR always on

&C1 DCD ON when detected

S0=2 Answer on second ring

The following commands may also be required atthe modem:

&Q6 Constant DTE to DCE

N0 Answer only at specified speed

W Disable serial data rate adjust

\Q3 Bidirectional RTS/CTS relay

&B1 Fixed serial port rate

S37 Desired line connection speed

When connected to another terminal device, theTerminal Window allows the user to send messagesor commands. Outgoing communications aredisplayed in the top pane and incoming messagesare displayed in the bottom two panes, in ASCIItext and HEX format.

There are some variations in the AT commandssupported by modem manufacturers. Refer to thehardware user documentation for a list of supportedAT commands and direction on issuing thesecommands.Figure 4-11 Terminal Window

4–18


OSCILLOGRAPH SETUP

The Oscillograph Recorder provides comprehensivedata recording (voltage, current, and status input/output signals) for all monitored waveforms (at 16samples per cycle). Oscillograph data can bedownloaded using the communications ports to anyIBM compatible personal computer running theM-3826 IPScom® Communications Software. Oncedownloaded, the waveform data can be examinedand printed using the optional M-3801D IPSplot®

PLUS Oscillograph Data Analysis Software and arealso available in COMTRADE file format.

▲ CAUTION: Oscillograph records are not retainedif power to the relay is interrupted.

The general information required to complete theinput data of this section includes:

• Recorder Partitions: When untriggered,the recorder continuously recordswaveform data, keeping the data in abuffer memory. The recorder's memorymay be partitioned into 1 to 24 partitions.Table 4-2 illustrates the number of cyclesof waveform data per partition with variousnumbers of windings

When triggered, the time stamp isrecorded, and the recorder continuesrecording for a user-defined period. Thesnapshot of the waveform is stored inmemory for later retrieval using IPScomCommunications Software. The OSC TRIGLED on the front panel will indicate arecorder operation (data is available fordownloading).

• Trigger Inputs and Outputs: Therecorder can be triggered remotely throughserial communications using IPScom, orautomatically using programmed statusinputs or outputs.

• Post-Trigger Delay: A post-trigger delayof 5% to 95% must be specified. Aftertriggering, the recorder will continue tostore data for the programmed portion ofthe total record before re-arming for thenext record. For example, a setting of80% will result in a record with 20%pretrigger data, and 80% post-trigger data.

■■■■■ NOTE: Oscillograph recorder settings are notconsidered part of the Setpoint Profile.Recorder settings are common to allprofiles.

Windings1, 2

311

207

155

124

103

89

Windings1, 2, 3

231

154

92

77

66

Windings1, 2, 3, 4

183

91

73

61

52

122

115

77

69

62

56

51

47

57

51

42

38

35

45

36

33

30

28

40

46

44

41

38

36

34

32

33

30

27

25

24

26

22

21

20

19

24

28

31

29

28

27

25

24

23

22

20

19

18

18

16

15

15

14

17

21

Number ofPartitions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

Table 4-2 Recorder Partitions

4–19


IPScom Setup Oscillograph Recorder■ NOTE: Communication must be established with

the target relay for this procedure. Whennot connected to the relay the Sendselection does not save the OscillographRecorder settings to an open file.

To setup the Oscillograph Recorder perform thefollowing:

1. From the IPScom Main Screen menuselect Relay/Oscillograph/Setup.IPScom will display the SetupOscillograph Recorder dialog screen(Figure 4-12).

2. Select the Number of Partitions.

The recorder's memory may be partitionedinto 1 to 24 partitions. The relayOscillograph Recorder memory buffer isfixed and contains room for a finite numberof cycles of recorded data. ConsiderTable 4-2 when determining the numberof Oscillograph records, The number ofcycles of recorded data is directly relatedto the number of records selected.

3. Select the desired Trigger Inputs andTrigger Outputs.

The recorder can be triggered remotelythrough serial communications usingIPScom, or automatically usingprogrammed status inputs or outputs.

4. Select the Post Trigger Delay.

A post-trigger delay of 5% to 95% mustbe specified. After triggering, the recorderwill continue to store data for theprogrammed portion of the total recordbefore re-arming for the next record. Forexample, a setting of 80% will result in arecord with 20% pre-trigger data, and80% post-trigger data.

5. Select Save, IPScom will display a saveto device Confirmation Screen (Figure4-2).

6. Select YES, IPScom will return to theMain Screen.

Figure 4-12 Setup Oscillograph Recorder

4–20


HMI Setup Oscillograph Recorder1. Press the ENTER pushbutton.


ENTER ACCESS CODE0





c. Go to step 4.








OSCILLOGRAPH RECORDER SETUPstat clear SETUP


RECORDER PARTITIONS1

8. Input the desired number of RecorderPartitions.


TRIGGER INPUTSI6 i5 i4 i3 i2 i1

10. Press the Right or Left arrow pushbuttonas necessary to select the desiredTrigger Input, then press ENTER, thefollowing will be displayed:

TRIGGER OUTPUTSo8 o7 o6 o5 o4 o3 o2 o1

11. Press the Right or Left arrow pushbuttonas necessary to select the desiredTrigger Output, then press ENTER, thefollowing will be displayed:

POST TRIGGER DELAY5 %

12. Press the Right or Left arrow pushbuttonas necessary to select the desired digitand the Up or Down arroe pushbutton toincrementthe Post Trigger Relay, thenpress ENTER, the following will bedisplayed:

OSCILLOGRAPH RECORDER SETUPstat clear SETUP

13. Press Exit.

4–21


IPScom Setup Sequence of Events RecorderProtective function Pickup, Trip, Dropout and/orOutput/Input Pickup or Dropout are selected totrigger the Sequence of Events Recorder.

■ NOTE: Communication must be established withthe target relay for this procedure. Whennot connected to the relay the Saveselection does not save the Sequence ofEvent settings to the open file.

To setup the Sequence of Events Recorder performthe following:

1. From the IPScom Main Screen menuselect Relay/Sequence of Events/Setup. IPScom will display the SetupSequence of Events Recorder dialogscreen (Figure 4-13).

2. Select the desired Inputs and Outputs,then select Save. IPScom will display asave to device confirmation (Figure4-2).

3. Select YES, IPScom will return to theMain Screen.

HMI Setup Through Fault RecorderThe Through Fault Recorder captures separateThrough Faults. Each Through Fault record containsthe serial number of the fault, duration of the event,maximum RMS fault current magnitude for eachphase during the fault, I2t and the time stamp of thefault. In addition, it will also store the total numberof through faults since last rest and total I2t foreach pahse since lase reset (up to 256 records).

To Setup the relay Through Fault recorder performthe following:



ENTER ACCESS CODE0





c. Go to step 4.




THROUGH FAULTips brkr THFLT tcm


THFLT CURRENT THRESHOLD__ Amps

6. Utilizing the Up or Down arrow pushbuttonset the Through Fault Current Thresholdsetting, then press ENTER, the followingis displayed:

THFLT CUM. I^2T LIMIT__ kA^2-cycles

7. Utilizing the Up or Down arrow pushbuttonset the Through Fault Cumulative i^2tLimit setting, then press ENTER, thefollowing is displayed:

THFLT PU OPERATIONS LIM.__ Records

8. Utilizing the Up or Down arrow pushbuttonset the Through Fault PU OperationsLimt setting, then press ENTER, thefollowing is displayed:

THFLT WINDING SELECTsum1 sum2 w1 w2 w3 w4

4–22


Figure 4-13 Setup Sequence of Events Recorder Dialog Screen

4–23


9. Utilizing the Right or Left arrowpushbutton select the target winding,then press ENTER, the following isdisplayed:

THFLT DELAY___ Cycles

10. Utilizing the Up or Down arrow pushbuttonset the Through Fault Time Delaysetting, then press ENTER, the followingis displayed:

THROUGH FAULTips brkr THFLT tcm

11. Press Exit.

HMI Demand Interval SetupThe Demand Interval setting determines the demandintegration interval (15 min, 30 min or 60 min).Demand time-tagged peak values are stored fordisplay and printing. See Chapter 2, Operation fordetailed information.

To setup the DEMAND INTERVAL, proceed asfollows:



ENTER ACCESS CODE0





c. Go to Step 4.








DEMAND INTERVALstat INT mstat clear

7. Press ENTER. The HMI will display W1Demand Phase Current.

DEMAND INTERVAL 15min 30min 60min

8. Utilizing the Right or Left arrowpushbutton select the desired DemandInterval, then press ENTER, the followingis displayed:


9. Press Exit.

4–24


If INPUT ACTIVATED PROFILES is disabled this screenallows manual selection of the Active Profile using thefront panel or through communications.

Allows the user to manually select the Active Profile.

This screen initiates a copy of the Active Profile to anyone of the other profiles.

The secondary VT voltage when primary voltage is equalto the rated transformer voltage (V trans rated/VT ratio).Range = 60–140 V; Increment 1 V.

Indicates VT connection.

If two winding is selected, then one of the three availablewindings must be disabled:

DISABLE WINDINGwin1 win2 win3 win4

The disabled winding will be removed from the differentialcalculation. However, the disabled winding may be utilizedfor other non-differential protection. See Section 4.5,Transformer Connections, for additional information.

INPUT ACTIVATED PROFILESdisable ENABLE

ACTIVE SETPOINT PROFILE__________________ 1

COPY ACTIVE PROFILETO_PROFILE_2

NOMINAL VOLTAGE120 Volts

V.T. CONFIGURATIONVAB vbc vac va vb vc vg

NUMBER OF WINDINGStwo three four

4.2 Configuration

The Configuration consists of defining commoninformation like CT and VT ratios, nominal voltagerating, transformer connections, and which profileis the Active Profile, etc. Values are entered similarto other setpoints. Configuration information iscommon to all profiles, and should be enteredbefore setpoint and time settings.

When INPUT ACTIVATED PROFILES are disabled,the Active Profile can be selected using the HMI orremote communication. When enabled, the Activeprofile is selected by the external connections ofInput 5 and 6.

■■■■■ NOTE: Table 4-3 assumes ACTIVE INPUTSTATE set to default setting (closecircuit = TRUE).

5tupnI 6tupnI NOITCELES

nepO nepO 1eliforP

desolC nepO 2eliforP

nepO desolC 3eliforP

desolC desolC 4eliforP

Table 4-3 Input Activated Profile Logic

4–25


▲ CAUTION: Changing from a standard Transformer/CTconnection to the equivalent custom setting may causethe relay to momentarily trip when current is present.

If Custom XFM/CT Connection is DISABLED (standardtransformer and CT configurations used), the relayautomatically computes the phase and magnitudecompensation required for the differential currents.

If Custom XFM/CT Connection is ENABLED, then theHMI will prompt the user to enter Transformer PhaseComp Type and CT PH/Mag Comp Type values for eachwinding. Zero Seq Comp will also be required to beenabled or disabled for each winding to complete thissetting. See Section 4.5, Transformer Connections, foradditional information.

W1 XFM PHASE COMP TYPE0




W1 CT PH/MAG COMP TYPE0




W1 ZERO SEQ COMPdisable enable



W4 Zero Seq Compdisable enable

CUSTOM XFM/CT CONNECTIONdisable enable

4–26



■ NOTE: When CT connection is chosen as delta, therelay calculates line currents using delta CTcurrents and the ground currents (for W2 andW3 only). The line currents (not delta currents)are displayed on the status screens (metering).The line currents are also used for 50, 51, and46 functions.

The Standard configuration requires the CT connection tobe defined as Wye, Delta-ab, Delta-ac, Inverse Wye,Inverse Delta-ab, or Inverse Delta-ac. See Section 4.5,Transformer Connection, for additional information.

CT CONNECTION W1CON_W1 con_w2 con_w3

CT CONNECTION W1Y dab dac inv_y

inv_dab inv_dac

CT CONNECTION W2con_w1 CON_W2 con_w3


inv_dab inv_dac

CT CONNECTION W3con_w1 con_w2 CON_W3


inv_dab inv_dac

CT CONNECTION W4con_w1 con_w2 CON_W3


inv_dab inv_dac

XFM CONNECTION W1XFM_W1 xfm_w2 xfm_w3

XFM CONNECTION W1Y dab dac inv_y

inv_dab inv_dac

XFM CONNECTION W2xfm_w1 XFM_W2 xfm_w3


inv_dab inv_dac


The Standard configuration requires the TransformerWinding Connection to be defined as Wye, Delta-ab,Delta-ac, Inverse Wye, Inverse Delta-ab, or Inverse Delta-ac. See Section 4.5, Transformer Connection for additionalinformation.

4–27


PHASE ROTATION PHASE seal in vt

PHASE ROTATIONa-c-b A-B-C

RELAY SEAL-IN TIME phase SEAL IN vt

RELAY SEAL-IN TIME OUT1____________ Cycles








ACTIVE INPUT OPEN/CLOSEi6 i5 i4 i3 i2 I1

Indicates the phase rotation.

Seal-in time for output relays. Eight individual seal-in delays can be specified for each output relay(OUT1-OUT16 for expanded I/O units).

XFM CONNECTION W3xfm_w1 xfm_w2 XFM_W3


inv_dab inv_dac

XFM CONNECTION W4xfm_w1 xfm_w2 XFM_W3


inv_dab inv_dac

Selects the active state for the six control/statusinputs. When highlighted (upper case), an opencircuit activates the input. When lowercase, a closedcircuit activates the input (default).

4–28


V.T. RATIOphase seal in VT

V.T. RATIO________________ :1

V.T.g RATIOVTφ VTG CT_W1 CT_W2

V.T.g RATIO________________ :1

W1 C.T. RATIOCT_W1 ct_w2 ct_w3

W1 C.T. RATIO________________ :1

W2 C.T. RATIOct_w1 CT_W2 ct_w3

W2 C.T. RATIO________________ :1

W3 C.T. RATIOct_w1 ct_w2 ct_w3




W2 C.T. GROUND RATIOCT_W2G ct_w3g

W2 C.T. GROUND RATIO________________ :1

W3 C.T. GROUND RATIOct_w2g CT_W3G

W3 C.T. GROUND RATIO________________ :1

W4 C.T. GROUND RATIOct_w2g CT_W3G

W4 C.T. GROUND RATIO________________ :1

CT Phase Ratio

CT Ground Ratio

VT Ratio

VT Ground Ratio

CT Ratios

CT Ground Ratios

The relay will calculate the W2 and W3 line currents whena delta CT configuration is selected, as follows:

For Delta ab CTs:

Line Current IA = (Iab–Ica + (Ig/CTCF))/3Line Current IB = (Ibc – Iab + (Ig/CTCF))/3Line Current IC = (Ica – Ibc + (Ig/CTCF))/3

where Iab, Ibc, Ica are the currents that enter the relay, and Igis the measured ground current.

CTCF is given by

4–29


Figure 4-14 IPScom® Relay Configuration Dialog

��

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Figure 4-15 Selection Screen for Expanded Input

4–30


4.3 System Diagrams

51W1

50W1

46W3

50BFW3

50W3

51W3

59G

3-CT

3-CT

M-3311A




B

1-CT

R

87GDW2

50NBFW2

51NW2

87H

Winding 1(W1)


(W3)50GW2

51GW2

C

87T

1

46W2

50BFW2

50W2

51W2

1

50GW3

51GW3

87GDW3

50NBFW3

51NW3

R

1

1

1

3-CT

1-CT

50NBFW1

51NW1

50BFW1

49W1

49W2

49W3

50NW2

50NW1

50NW3

Targets(Optional)


Metering

Sequence OfEvents

Waveform Capture

IRIG-B



Programmable I/O

Self Diagnostics


*

*

*


ProgrammableLogic

A


52 52

51W4

50W4

1

50NBFW4

51NW4

50BFW4

49W4

50NW4

*

3-CT

Winding 4(W4)

VT 2 1-VT 2

81O/U

2724

VG V0





Figure 4-16 A Typical One-Line Functional Diagram

4–31


51Sum

50Sum

46W3

50BFW3

50W3

51W3

59G

3-CT

3-CT

M-3311A




B

1-CT

R

87GDW2

50NBFW2

51NW2

87H

Winding 1(W1)


(W3)50GW2

51GW2

C

87T

1

46W2

50BFW2

50W2

51W2

1

50GW3

51GW3

87GDW3

50NBFW3

51NW3

R

1

1

1

3-CT

1-CT

50NBF

Sum

51NSum

50BFSum

49Sum

49W2

49W3

50NW2

50NW1

50NW3

Targets(Optional)


Metering

Sequence OfEvents

Waveform Capture

IRIG-B



Programmable I/O

Self Diagnostics


*

*

*


ProgrammableLogic

A


52 523-CT

Winding 4(W4)

VT 2 1-VT 2

81O/U

2724Σ

* Two sets of summed winding cuurentscan be enabled at a time.

VGVo





Figure 4-17 M-3311A Typical Summing Currents One-Line Functional Diagram

4–32


15

16

PS2 P/S

+

-

61 63

60 62 12

13

31

32

33

34

Self-Test

PS1 OUT 2Typical

OUT 1Typical

Self-Test

Alarm

Power OKStatusAlarm

TripAlarm

52Trip

M-3311A Output Contacts

PowerTransformer

5150

M-3311A (W-2)

A B CA

B

C

A

B

C

52

OR

Winding 2(W-2)

Winding 3(W-3)

IG2

37 36

OR

37 36

A B C

52

ABC

5958

M-3311A (W-3)IG3

M-3311A

M-3311A

R R

A

B

C

VG65

64

M-3311A

5756

5554

5352

M-3311A (W-3)

ABC

U

49 48

47 46

45 44

M-3311A (W-2)

A B C

VO

VO

5252

10 9 8 11

IN 1(52b)

IN 2Typical

IN 3Typical

INReturn

52b OtherInputs

OtherInputs

M-3311A Input Contacts

43 42

41 40

39 38

M-3311A (W-1)

7170

6968

6766

M-3311A (W-4)

Figure 4-18 Typical Three-Line Connection Diagram

4–33


4.4 System Setpoints

Setpoint Profiles (Setting Groups)Up to four setpoint profiles may be used. Eachprofile contains a function configuration andassociated settings. One of the four profiles maybe designated as the Active Profile which will containthe parameters that the relay will actively use. Onlythe Active Profile may be edited.

The Active Profile may be designated eithermanually using the HMI interface, by control/statusinput activation (input activated profiles enabled,see Table 4-3) or by remote communication.

A Copy Profile feature is available that copies animage of the Active Profile to any one of the otherthree profiles. This feature can speed up theconfiguration process. Consider, for example, asituation where a breaker will be removed fromservice. Two profiles will be used: an “In Service”profile (Profile 1) and an “Out of Service” profile(Profile 2).

Profile 2 will be identical to the “In Service” profile,with the exception of the overcurrent settings. Profile1 is set to be the Active profile, and all setpointsentered. An image of Profile 1 will then be copied toProfile 2 with the Copy Active Profile command.Profile 2 is then selected as the Active Profile andthe overcurrent setpoints modified.

▲ CAUTION: During profile switching, relayoperation is disabled for approximately 1 second.

Following the above procedure not only acceleratesthe configuration process, but also removes thepossibility of errors if all setpoints are re-enteredmanually.

FunctionsConfiguration of the relay consists of enabling thefunctions for use in a particular application,designating the output contacts each function willoperate, and which control/status inputs will blockthe function. The choices include eight programmableoutput contacts (OUT1–OUT8) and six control/statusinputs (IN1–IN6)/(OUT1–OUT16 and IN1–IN18 forexpanded I/O units).

Control/status inputs may also initiate actions, suchas Breaker Failure Initiate, Trigger OscillographRecorder, Switch Setpoint Profile, or initiate anIPSlogic function. The control/status inputs andoutput contacts need to be chosen before configuringthe individual functions. Both can be recorded onthe Relay Configuration Table in Appendix A, Forms.

Special ConsiderationsStatus input IN1 is pre-assigned to be the 52bbreaker contact. IN5 and IN6 may be used to selectsetpoint profiles (with input activated profiles enabled).

Outputs 1–6 and 9–23 are form “a” contacts (normallyopen), and outputs 7 and 8 are form “c” contacts(center tapped “a” and “b” normally closed) contacts.Output contacts 1–4 contain special circuitry forhigh-speed operation and pick up 4 ms faster thanoutputs 5–8. Function 87 outputs are recommendedto be directed to OUT1 through OUT4 contacts.

The following functions can be configured usingenable/disable output, and status input blockingdesignations:

+ 24 Volts/Hz Overexcitation: Definite Time#1, #2, Inverse Time

+ 27 Phase Undervoltage

• 46W2/W3/W4 Negative SequenceOvercurrent: Definite Time, Inverse Time

• 49 Winding Thermal Protection (W1,W2,W3,W4)

• 50 Instantaneous Phase Overcurrent, #1,#2, #3, #4, #5, #6, #7, #8

• 50BFW1/W2/W3/W4 Breaker Failure

• 50GW2/W3/W4 Instantaneous GroundOvercurrent, #1, #2

• 50N Instantaneous Residual Overcurrent,#1, #2, #3, #4, #5, #6, #7, #8

• 51 Inverse Time Phase Overcurrent #1,#2, #3, #4

• 51GW2/W3/W4 Inverse Time GroundOvercurrent

• 51 Inverse Time Residual Overcurrent#1, #2, #3, #4

+ 59G Ground Overvoltage, #1, #2

+ 81 Over/Under Frequency: #1,#2,#3, #4

• 87H Phase Differential Current, High-set

• 87T Phase Differential Current, HarmonicRestrained Percentage Differential

• 87GDW2/W3/W4 Ground Differential: #1,#2

• Through Fault Monitoring

• TCM Trip Circuit Monitoring

• BM Breaker Monitoring: W1, W2, W3, W4

• IPSlogic: #1,#2,#3,#4,#5,#6

(+) = Denotes the Optional Single-Phase VoltageProtection Package Functions

4–34


Example of Transformer limits:

• Full Load V/Hz = 1.05 PU (HV terminals)

• No Load V/Hz = 1.10 PU (HV terminals)

NOTE: The curves must be on the same voltagebase to be combined on one graph. Anexample is shown in Figure 4-20,Example of Capability and ProtectionCurves. The manufacturer of thegenerator and transformer will providethese over-excitation capability limits.

Depending on these characteristics, they can bestbe matched by one of the four families of inversetime curves, alone or in conjunction with definitetime setpoints. Coordination of capabilities andprotection is achieved when the time between therelay operation and the capability limit is sufficientfor the breakers to open and de-energize the units.This coordination time is read vertically betweenthe two curves at any given V/Hz value.

Figure 4-21, Example of Capability and ProtectionCurves, illustrates a composite graph of generatorlimits, transformer limits, a chosen inverse timecurve, inverse time pickup, and definite timesetpoint. While inverse time curve selection mayprovide more selective and sensitive protection, atraditional two-step protection scheme may berealized by using the two definite time functions(24DT #1 and #2), and disabling the inverse (24IT)element.

24 Volts/Hz OverexcitationNOTE: Two voltage inputs are available for the

M-3311A. They can be either a phasevoltage input or voltage generated froma broken delta VT connection. 81O/U,27, and 24 Functions are only availableif the voltage input is connected to thephase voltage. If the voltage input isconnected to phase voltage, Function59G will be unavailable. Function 59G isonly available if the voltage input isconnected to a broken delta VT. Ifvoltage input is connected to brokendelta VT, Functions 81O/U, 27, and 24will be unavailable.

The 24 Volts-Per-Hertz (V/Hz) function providesover-excitation protection for the transformer. Asthe volts per hertz level rises above a transformer’slimit, leakage flux increases. The leakage fluxinduces current in the transformer support structurecausing rapid localized heating.

In power plant applications, over-excitation canoccur due to sudden tripping of the generator as aresult of faults and other abnormal conditions.

In Extra High Voltage (EHV) applications, anincorrectly switched line can lead to over-excitationat tapped transformers due to combinedcapacitance.

In transmission and distribution applications, suddenloss of load or improper capacitor/reactor switchingmay result in overexcitation.

This function provides two Definite Operating Timesetpoints, four families of Inverse Time curveswidely used in the industry (see Appendix D, FiguresD1 to D4), and a linear reset rate programmable tomatch specific cooling characteristics of thetransformer. The V/Hz function provides reliablemeasurements of V/Hz for a frequency range of10–80 Hz.

When applied for generator and unit transformerprotection, the first task in setting this relay functionis to determine the desired protective levels andtimes. This can be accomplished by combining theV/Hz limit curves of the transformer and theassociated generator on one graph and simplifyingthe result into one curve to coordinate with theprotection.

4–35


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Figure 4-19 Example of V/Hz Capability and Protection Curves

4–36


Definite time setpoint #1 establishes the V/Hz level abovewhich the protection operating time will be fixed at thedefinite time delay #1 (See Figure 4-19). 100% is equal tonominal voltage at nominal frequency (50/60Hz). SeeSection 4.2, Configuration.

Delay time #1 establishes the operation time of theprotection for all V/Hz values above the level set bydefinite time setpoint #1. Note that delay time #1 (A.1 inFigure 4-19) must be less than the operating time of theselected inverse curve at the definite time setpoint #1 V/Hz level (A.2 in Figure 4-19). Delay time A.1 becomes thedefinite minimum time for the inverse curve which preventsmisoperation during transients. It is highly recommendedthat 24DT #1 be enabled along with 24IT function.

Definite time setpoint #2 could be programmed to alarm,alerting the operator to take proper control action topossibly avoid tripping (may be used to trip). Time tooperation at any V/Hz value exceeding Definite timesetting #2.

As shown in Figure 4-19, the pickup value is the V/Hzvalue (in %) that the chosen inverse curve beginsprotective operation. Typical value is 105%.

The appropriate curve family for this protection applicationis designated by circling the CRV #. These curves areshown in Appendix D, Inverse Time Curves. Note thatthe operating times are constant above 150% V/Hz values.

The appropriate curve in the family is designated by theassociated “K” value of the curve. These are shown inAppendix D, Inverse Time Curves.

After any V/Hz excursion, cooling time must also betaken into account. If the unit should again be subjectedto high V/Hz before it has cooled to normal operatinglevels, damage could be caused before the V/Hz trippoint is reached. For this reason, a linear resetcharacteristic, adjustable to take into account the coolingrate of the unit, is provided. If a subsequent V/Hz excursionoccurs before the reset characteristic has timed out, thetime delay will pick up from the equivalent point (as a %)on the curve. The value entered here should be the timeneeded for the unit to cool to normal operating temperatureif the V/Hz excursion time was just under the trip time.

If this function is enabled, the following settings are applicable:

24DT#1 PICKUP______________ 110%

24DT#1 DELAY360 Cycles

24DT#2 PICKUP______________ 110%

24DT#2 DELAY360 Cycles

24IT PICKUP______________ 105%

24IT CURVECRV#1 crv#2 crv#3 crv#4

24IT TIME DIAL_________________ 9

24IT RESET RATE200 Seconds

4–37


Figure 4-20 M-3826 IPScom® (24) Volts/Hertz Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F24 Volts/HZ Overexcitation

COMMAND BUTTONS

Save Saves all information to the relay.

Cancel Returns the user to the previous window; any changes to the displayed information are lost.

4–38


Undervoltage pickup establishes the voltage levelbelow which the function timer will start.

Enables or disables the undervoltage inhibit feature.

Undervoltage inhibit establishes the voltage levelbelow which the function will be disabled.

The operating time of the function.

27 PICKUP108 Volts

27 INHIBITdisable ENABLE

27 INHIBIT108 Volts

27 DELAY30 Cycles


Figure 4-21 M-3826 IPScom® (27) Undervoltage Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F27 Phase Undervoltage

COMMAND BUTTONS



27 Phase UndervoltageNOTE: Two voltage inputs are available for the


The 27 Undervoltage function may be used todetect any condition causing long term undervoltage

This function is used to shed the transformer loadwhen the power system does not have enoughreactive support, similar to the Over/Underfrequency(81O/U) function.

The Inhibit setting of this function prevents it fromoperating during fault conditions.

4–39


Winding 2 negative sequence overcurrent pickup estab-lishes the negative sequence overcurrent level above whichthe definite time function timer will start.

This setting is the operating time of the definite time func-tion.

Negative sequence overcurrent pickup establishes thenegative sequence overcurrent level above which the in-verse time function timer will start.

This setting selects one of eleven families of curves, asshown in Appendix D, Figures D-5 through D-15.

The appropriate curve in the selected family of curves ischosen here.

These screens are the same for Winding 4.

46DTW2 PICKUP0.50 Amps

46DTW2 DELAY120 Cycles

46ITW2 PICKUP1.00 Amps

46ITW2 CURVEBEDEF beinv bevinv beeinv

46ITW2 TIME DIAL5.0

46DTW3 PICKUP0.50 Amps

46DTW3 DELAY120 Cycles

46ITW3 PICKUP1.00 Amps

46ITW3 CURVEBEDEF beinv bevinv beeinv

46ITW3 TIME DIAL5.0


46 Negative Sequence OvercurrentThe 46 Negative Sequence Overcurrent functionprovides protection against possible damage dueto unbalanced faults and open conductors.

The pickup setting of this function can be set belowthe system load for increased sensitivity for phase-to-phase fault backup of feeder protective relays.

This function has a definite time element and aninverse time element. The definite time pickupvalue and definite operating time are typicallyassociated with an alarm function. The inversetime element is typically associated with a tripfunction.

The inverse time function can be selected as oneof the eleven curve families: definite, inverse, veryinverse, extremely inverse, and four IEC curves.The operator selects the pickup and time dialsettings.

This protection must not operate for system faultsthat will be cleared by feeder/line relaying. Thisrequires coordination with feeder line protection,bus differential, and breaker failure backupprotections.

4–40


Figure 4-22 M-3826 IPScom® (46) Negative Sequence Overcurrent Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F46 Negative Sequence Overcurrent

COMMAND BUTTONS



4–41


49 Winding Thermal ProtectionThe thermal overload function provides protectionagainst possible damage during overload conditions.Temperature and overload monitoring of oil-filledtransformers are carried out with the use of indicatingthermostats (standard). The oil thermometer, whichmeasures the top oil temperature, cannot be reliedupon to detect short-time overloads beyondpermissible limits.

Transformers without winding thermometers shouldhave a thermal current protection with operatingcurrent/time characteristics that correspond to thecurrent overload characteristic of the transformerwindings. For transformers with windingthermometers, a thermal current protection willprovide a back-up function for this monitoring device.

The 49 function uses the demand current as pre-load current, to protect the transformer followingthe IEC-255-8 standard:

�2��6��$�*��7��6��!��$�*��7�

6��$�*��7��

Where: t = time to tripτ = time constantIload

= relay currentIpreload = pre-load currentImax = maximum allowed continuous overload current

The pre-load current “Ipre-load” is the previous averagecurrent for the last 15 minutes, 30 minutes, or 60minutes programmable into the demand metering.

The M-3311A includes four setpoint groups thatcan accommodate a power transformer’s differentMVA requirements. One setpoint group can beused for basic rating setpoints and others can beused to change to a second group of setpoints foruse with higher ratings when forced cooling isrequired.

Example: If we consider that the transformer wasworking with 80% of its rating power prior tooverload, then the current goes up to 2.0 times themaximum current (Iload/Imax=2.0). Selecting thecurve P=0.8 (see Figure 4-23), we have t/τ=0.1133.If τ =30 minutes, then the time delay for thiscondition would be: t=0.1133 x 30=3.3999 minutes.

4–42


��

��

��

��

�

��

� � � � � � �

��

��

2�(� 2�(' 2�(8 2�(�

2�(�

2�(�

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��

��

Figure 4-23 49 Function Overload Curves

4–43


Selects the time constant, ‘τ ’

Selects the maximum allowed continuous overloadcurrent.

Select the winding current to be used as the input.

Figure 4-24 M-3826 IPScom® (49) Winding Thermal Protection Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F49 Winding Thermal Protection

COMMAND BUTTONS



49 TIME CONSTANT5.0 Min

49 MAX OVERLOAD CURRENT2.00 Amps

49 CURRENT SELECTIONsum1 sum2 w1 w2 w3 w4


4–44


AND

ORInput Initiate

50BF-PhI>Pickup

50BF-NI>Pickup

OR

Output Initiate

ProgrammedOutput

ContactsTDOE

DelayTimer

Figure 4-25 Breaker Failure Logic Diagram

50BF Breaker FailureThe 50BF function is applicable when a transformerbreaker is present. If enabled, the 50BF-Ph phasedetector element is used for breaker failure and the50BF-N provides breaker flashover protection (seeFigure 4-25). This provides an additional BreakerFailure Initiate, which is active only when the breakeris open.

50BF-Phase Breaker FailureWhen the M-3311A Transformer Protection Relaydetects an internal transformer fault or an abnormaloperating condition, it closes an output contact totrip the transformer breakers. Protection outputcontacts must be connected to trip the breakersrequired to isolate the transformer from the system.The breaker failure condition is detected by thecontinued presence of current in any one or morephases after a breaker trip command is issued.

Implementation of the transformer breaker failurefunction is illustrated in Figure 4-25. The breakerfailure timer will be started whenever any one of thedesignated output contacts or the externalprogrammed breaker failure initiate control/statusinputs are activated. The breaker failure (TDOE)timer continues to time if any one of the phasecurrents is above the 50BF-Ph pickup setting.

50BF-Residual ElementThis overcurrent relay is energized from the residualcurrent, see Figure 4-16, One-Line FunctionalDiagram. This function is internally identical to the50BF-Ph element and operates using residual (triplezero sequence) current.

4–45


50BFW1 PICKUP RESIDUAL1.00 Amps

50BFW1 PICKUP PHASE1.00 Amps

50BFW1 INPUT INITIATEi6 i5 i4 i3 i2 I1

50BFW1 OUTPUT INITIATEo8 o7 o6 o5 o4 o3 o2 O1

50BFW1 DELAY30 Cycles

NOTE: These screens are also applicable for Windings 2, 3 and 4.

Sets 50BFW1 residual current pickup. 0.5A is a typicalsetting.

Sets 50BFW1 phase current pickup. 0.3 A is a typical set-ting.

Designates the control/status inputs which will initiate thebreaker failure timer.

Designates the relay outputs which will initiate the breakerfailure timer.

For transformer breaker failure use, the time delay shouldbe set to allow for breaker operating time plus margin.


Figure 4-26 M-3826 IPScom® (50BF) Breaker Failure Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F50BF Breaker Failure

COMMAND BUTTONS



4–46


50#1 PICKUP1.00 Amps

50#1 DELAY30 Cycles

50#1 CURRENT SELECTIONsum1 sum2 w1 w2 w3 w4

NOTE: These screens are the same for50#2 thru 50#8

50GW2#1 PICKUP1.00 Amps

50GW2#1 DELAY30 Cycles

50GW2#2 PICKUP1.00 Amps

50GW2#2 DELAY30 Cycles

Sets ground pickup for instantaneous ground overcurrent.

Sets delay for instantaneous ground overcurrent.

NOTE: These screens are also applicable for Windings 3 and 4 (Function 50G).

Sets the current input for instantaneous ground overcurrent.





50/50G Instantaneous Overcurrent, Phase &GroundThe Instantaneous phase 50 and InstantaneousGround 50G overcurrent functions provide fasttripping for high fault currents. The settings of bothfunctions must be set such that they will not pickupfor faults or conditions outside the immediateprotective zone. Two phase elements (#1 and #2)are available on Winding 2, 3, and 4 for the 50G

function for phase overcurrent functions, output isinitiated when any individual phase A, B or Cexceeds the pickup. These elements also allow theuser to program several logic schemes describedin Section 4.6, System Aplication an LogicSchemes.

4–47


Figure 4-27 M-3826 IPScom®(50) Instantaneous Phase Overcurrent Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F50 Instantaneous Phase Overcurrent

COMMAND BUTTONS



Figure 4-28 M-3826 IPScom® (50G) Instantaneous Ground OvercurrentSetpoint Ranges

Path: Relay/Setup/Relay Setpoints/F50G Instantaneous Ground Overcurrent

COMMAND BUTTONS



4–48


50N#1 PICKUP1.00 Amps

50N#1 CURRENT SELECTIONsum1 sum2 w1 w2 w3 w4

50N#1 DELAY30 Cycles

NOTE: These screens are also applicable for 50N#2 through 50N#8

Sets pickup for instantaneous residual overcurrent.

Sets current input for instantaneous overcurrent.

Sets delay for instantaneous residual overcurrent.

Figure 4-29 M-3826 IPScom®(50N) Instantaneous Residual OvercurrentSetpoint Ranges

Path: Relay/Setup/Relay Setpoints/F50N Instantaneous Residual Overcurrent

COMMAND BUTTONS




50N Instantaneous Residual OvercurrentThe Instantaneous Residual (50N) overcurrentfunction provides fast tripping for high fault currents.Settings must be made in such a way as to preventpickup for fault or conditions outside the immediateprotective zone.

4–49


51#1 PICKUP1.00 Amps

51#1 CURVEBEDEF beinv bevinv beeinv

51#1 TIME DIAL5.0

51#1 CURRENT SELECTIONsum1 sum2 w1 w2 w3 w4

NOTE: These screens are also applicable for 51#2 through 51#4.

Figure 4-30 M-3826 IPScom® (51) Inverse Time Phase Overcurrent Setpoint RangesPath: Relay/Setup/Relay Setpoints/F51 Inverse Time Phase Overcurrent

COMMAND BUTTONS



Sets phase current pickup for 51W1.

Selects one of the eleven inverse time curves asshown in Appendix D, Figures D-5 through D-15.

The appropriate curve in the selected family of curvesis chosen here.

Sets current input for inverse time overcurrent.


51 Inverse Time Phase OvercurrentThe 51 Inverse Time Phase Overcurrent function,one set per winding are used to trip circuitsselectively and to time coordinate with up or downstream relays. For this function, eight completeseries of inverse time tripping characteristics areincluded. The eight curve families to be chosen aredefinite, inverse, very inverse, extremely inverse,and four IEC curves. The time dial within eachfamily setting and tap setting is selected throughthe relay menu.

The curves available for use are shown in AppendixD, Inverse Time Curves, Figures D-5 through D-15.They cover a range from 1.5 to 20 times the tap.For currents beyond 20 times the pickup setting,the relay operating time will remain the same as thetime at 20 times pickup setting.

4–50


51N#1 PICKUP1.00 Amps

51N#1 CURVEBEDEF beinv bevinv beinv

51N#1 TIME DIAL5.0

51N#1 CURRENT SELECTIONsum1 sum2 w1 w2 w3 w4

NOTE: These screens are also applicable for 51N#2, 3 and 4.

Figure 4-31 M-3826 IPScom® (51N) Inverse Time Residual OvercurrentSetpoint Ranges

Path: Relay/Setup/Relay Setpoints/F51N Inverse Time Residual Overcurrent

COMMAND BUTTONS



Sets phase current pickup for 51N#1.

Selects one of the eleven inverse time curves, asshown in Appendix D, Figures D-5 through D-15.

The appropriate curve in the selected family of curvesis chosen here.

Sets current input for inverse time residualovercurrent.


51N Inverse Time Residual OvercurrentThe 51 Inverse Time Residual Overcurrent providesprotection against ground faults. Since normalresidual current is usually much lower than the fullload phase current, this function can be set moresensitively than the phase overcurrent protection.

The curves available for use are shown in AppendixD, Inverse Time Curves, Figures D-5 through D-15.They cover a range from 1.5 to 20 times tap. Forcurrents beyond 20 times the pickup setting, therelay operating time will remain the same as thetime at 20 times pickup setting.

4–51


51GW2 PICKUP1.00 Amps

51GW2 CURVEBEDEF beinv bevinv beinv

51GW2 TIME DIAL5.0

NOTE: These screens are also applicable for Windings 3 and 4.

Figure 4-32 M-3826 IPScom®(51G) Inverse Time Ground OvercurrentSetpoint Ranges

Path: Relay/Setup/Relay Setpoints/F51G Inverse Time Ground Overcurrent

COMMAND BUTTONS



Sets residual pickup for 51G.

Selects one of the eleven inverse time curves, as shownin Appendix D, Inverse Time Curves, Figures D-5 throughD-15.

The appropriate curve in the selected family of curves ischosen here.


51G Inverse Time Ground OvercurrentThe 51G Inverse Time Ground Overcurrent functionis used to trip circuits selectively and to timecoordinate with up or downstream relays. For thisfunction, eight complete series of inverse timeneutral tripping characteristics are included. Thefour curve families to be chosen are definite,inverse, very inverse, extremely inverse, four IECand three IEEE curves. The operator selects thetime dial within each family setting and tap settingthrough the relay menu.

The curves available for use are shown in AppendixD, Inverse Time Curves, Figures D-5 through D-15.They cover a range from 1.5 to 20 times the tap.For currents beyond 20 times the pickup setting,the relay operating time will remain the same as thetime at 20 times pickup setting.

4–52


59G#1 PICKUP10 Volts

59G#1 DELAY30 Cycles

59G#2 PICKUP10 Volts

59G#2 DELAY30 Cycles

Figure 4-33 M-3826 IPScom® (59G) Ground Overvoltage Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F59G Ground Overvoltage

COMMAND BUTTONS



Sets voltage pickup for ground overvoltage.

Sets delay for ground overvoltage.

Sets voltage pickup for ground overvoltage.

Sets delay for ground overvoltage.


59G Ground OvervoltageNOTE: Two voltage inputs are available for the

M-3311A. They can be either a phasevoltage input or voltage generated froma broken delta VT connection. 81O/U,27, and 24 Functions are only availableif the voltage input is connected to thephase voltage. If the voltage input isconnected to phase voltage, Function59G will be unavailable. Function 59G isonly available if the voltage input isconnected to a broken delta VT. If

voltage input is connected to brokendelta VT, Functions 81O/U, 27, and 24will be unavailable.

The 59G Ground Overvoltage function providesprotection for ground faults on the system.

Pickup setting for 59G should be set in such a waythat it is higher than normal neutral voltage duringunbalanced conditions. The time delay should be setto coordinate with downstream ground relaying.

4–53


81#1 PICKUP56.00 Hz

81#1 DELAY30 Cycles

81#2 PICKUP56.00 Hz

81#2 DELAY30 Cycles

81#3 PICKUP56.00 Hz

81#3 DELAY30 Cycles

81#4 PICKUP56.00 Hz

81#4 DELAY30 Cycles

The pickup and time delay setting for load sheddingshould be selected based on load frequency char-acteristics of the system.

A minimum time delay of 6 cycles is recommendedto prevent relay operation during switching transients.


81O/U Over/UnderfrequencyNOTE: Two voltage inputs are available for the


The 81O/U Over/Underfrequency function providesprotection against abnormal frequency. TheUnderfrequency function is typically used for loadshedding applications. The frequency functions areautomatically disabled when the input voltage isless than 5 volts.

When the frequency setpoint is selected as belowthe nominal frequency, the function operates as anunderfrequency, otherwise, it operates as anoverfrequency function.

4–54


Figure 4-34 IPScom® (81O/U) Over/Underfrequency Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F81 Over/Under Frequency

COMMAND BUTTONS



4–55


87H PICKUP20.0 PU

87H DELAY2 Cycles

High-set pickup setting.


Figure 4-35 M-3826 IPScom®(87) Phase Differential Current Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F87 Phase Differential Current

COMMAND BUTTONS



87 Phase Differential87H Phase Differential Unrestrained High SetOvercurrentThe 87H Phase Differential Unrestrained High SetOvercurrent function is used to detect transformerinternal winding faults with high currents. Unlike the87T function, the 87H function is not blocked byharmonic restraint. The pickup for this function

should be set above the worst case first peak of theinrush current. This prevents misoperation of thefunction due to magnetizing inrush current duringswitching on of the transformer. Typical pickupsetting is between 8 to 12 PU. The per unit is basedon the CT tap setting. The 87H is typically set withno intentional time delay (one cycle time delaysetting corresponds to no intentional time delay).

4–56


87 Phase Differential■ NOTE: See Section 4.6, Transformer

Connections for detailed discussion ontransformer connection applications for87 function differential.

87T Phase Differential Restrained OvercurrentThe 87T Phase Differential function is a percentagedifferential function with dual adjustable slopecharacteristics (see Figure 4-37). This functionprovides protection for the transformer from internalwinding faults. This function offers sensitivedifferential protection at low fault currents andtolerates larger mismatch of currents that can occurduring high through fault current for greater security.

The 87T minimum pickup setting should be set toprevent operation of the 87T function due totransformer excitation current. Typical setting is0.2 to 0.4 PU of tap setting.

Slope 1The setting of Slope #1 should be set according tovarious possible errors:

1. Tapchanger operations in the powertransformer (worst case 10%).

2. CT mismatch due to ratio errors. Errorscan be as high as 10%.

A typical Slope #1 setting of 30 to 40% preventsmisoperation due to above errors.

Slope 2For heavy faults outside the differential zone, CTsaturation can occur. Factors such as residualmagnetism in the CT core, CT characteristicmismatch and burden mismatch can contributelarge differential currents during this condition. Slope#2 should be set higher than Slope #1. It canprovide security against misoperation during highthrough fault currents. A typical Slope #2 setting is60 to 100%.

Even Harmonic RestraintTransformer magnetizing inrush currents containsignificant amounts of 2nd and some 4th harmoniccurrents. This inrush can cause undesirable tripsand delay putting a transformer into service. Theeven harmonic restraint keeps it from operatingduring a magnetizing inrush condition. Magnetizinginrush current is distinguishable from fault currentby harmonic components. The M-3311ATransformer Protection Relay can be set to restrainif the level of even harmonic current is above a setpercentage of fundamental.

The harmonic currents are calculated from thedifferential current in the windings. The amount ofeven harmonic current (Id

24) in PU can be found by

using the formula:

Id Id Id24 22

42= +

where Id2 and Id

4 are second and fourth harmonic

currents in PU, respectively.

The percentage of even harmonics is found by theratio Id

24/Id

1: If this number is above the even

harmonic restraint setpoint, function 87T will restrainfrom operation.

The amount of even harmonics present in thetransformer inrush currents depends upon themagnetizing characteristics of the transformer coreand residual magnetism present in the core. Asetting in the range of 10 to 15% can providesecurity against misoperations during magnetizinginrush conditions.

Modern transformers tend to have low core lossesand very steep magnetizing characteristics. Whenthe relay is applied to this type of transformers, theeven harmonic setting should be set around 10%(in some cases, the setting may be lower than10%). Older transformer designs tend to have higheramounts of even harmonics, where a setting of15% or greater can provide security againstmisoperation during magnetizing inrush conditions.

The setting of the even harmonic restraint should beset to a low enough value to provide security againstmisoperation during transformer magnetizing inrushcurrent and it should not be lower than the amount ofeven harmonics generated during internal faultconditions with CT saturation so as not to compromisereliability for heavy internal fault detection.

Fifth Harmonic RestraintTransformer over-excitation produces a high amountof excitation current, which will appear as adifferential current to the 87T function. The FifthHarmonic restraint function can prevent misoperationof the 87T function by shifting the minimum pickupto a higher value (typically set at 150 to 200% of87T minimum pickup), during transformer over-excitation conditions.

The over-excitation condition is detected by thepresence of Fifth Harmonic component as apercentage of fundamental component of differentialcurrent above a set value.

The amount of Fifth Harmonic depends on thetransformer core magnetizing characteristics. Asetting of 30% is adequate to discriminate over-excitation from other conditions.

4–57


=

=

W3

W2W1a

b

c

a

b

c

A

BC

Dac CT 2000:5

Wye CT 8000:5 Wye CT 8000:5

Transformer Rating392.8 MVA / 196.4 MVA / 196.4 MVA

161 kV / 17.1 kV / 17.1 kV

Figure 4-36 Transformer CT Tap Setting Example

87T CT Tap Settings For W1, W2, W3 and W4

MVA x 103

87 CT TapWN

=

S3 x kVL-L x CTRWN

where WN is the winding number.

CT Tap Setting Calculation ExampleBased on the transformer example in Figure 4-37,the CT tap calculations are presented below.

Since the S3 magnitude compensation for Deltaconnected CT’s is already taken into account in therelay calculation, the same equation is used tocalculate each CT Tap setting.

392.8 MVA x 103

87 CT Tap W1

= = 8.29 S3 x 17.1 kV x 1600

392.8 MVA x 103

87 CT Tap W2

= = 8.29 S3 x 17.1 kV x 1600

392.8 MVA x 103

87 CT Tap W3

= = 3.52 S3 x 161 kV x 400

Cross Phase AveragingCross phase averaging is used to average theharmonics of all three phases to provide restraint ofphases which may not have enough harmonics.Cross phase average, when enabled, providessecurity against misoperation during magnetizinginrush. However, it may slightly delay the relayoperation for internal faults. The level of crossphase average current may be found using thefollowing equations.

Even Harmonic Cross Phase Average:

IdCPA24 IAd

242 + IBd

242 + ICd

242

Fifth Harmonic Cross Phase Average:

IdCPA5 IAd

52 + IBd

52 + ICd

52

When enabled, the above averages are used alongwith fundamental component of differential currentin each of the phases to calculate the harmonicpercentages.

It is recommended to enable the cross phaseaverage for even harmonic restraint, and disablethe cross phase average for 5th harmonic restraint.

87T CT Tap SettingsThe 87TW1, W2, W3 and W4 CT tap settings areused to convert the W1, W2, W3 and W4 current interms of P.U. These settings are provided tocompensate for CT ratio mismatch for 87T and 87Hfunctions. The example calculation is for a threewinding application. These should be calculated asfollows:

4–58


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Figure 4-37 87T Programmable Dual Slope Percentage Restraint Characteristic

I

where

IR

= Σ a IAW1 af + af

I

AW2 af + af

I

AW3 a f I

AW4 af

2

Id

= Σ IAW1

+ I

AW2 +

I

AW3 +

I

AW4

4–59


87T EVEN RESTRAINT10%

87T 5TH RESTRAINTdisable enable CROSS_AVG

87T 5TH RESTRAINT10%

87T PICKUP@5TH RESTRAINT0.75 PU

87 W1 C.T.TAP1.00

87 W2 C.T. TAP1.00

87 W3 C.T. TAP1.00

87 W4 C.T. TAP1.00

87T PICKUP0.50 PU

87T SLOPE #125%

87T SLOPE #275%

87T SLOPE BREAKPOINT2.0 PU

87T EVEN RESTRAINTdisable enable CROSS_AVG


See previous pages for more information on these settings.

4–60


87GDW2#1 PICKUP0.2 Amps

87GDW2#1 DELAY6 Cycles

87GDW2#2 PICKUP0.2 Amps

87GDW2#2 DELAY6 Cycles

87GDW2 C.T. RATIO CORR.1.00

87GDW2 DIR ELEMENTdisable enable

87GDW2 WINDING SELECTsum1 sum2 SNGL_win


87GD Ground Differential■ NOTE: This function is not provided on Winding

One.

The 87GD ground differential element may providesensitive ground fault protection on winding 2, 3 orwinding 4.

The relay provides a CT Ratio Correction whichremoves the need for auxiliary CTs when the phase,winding 2, 3 or winding 4 and their ground CT ratiosare different.

The directional element calculates the product(-3I

0IGCosφ) for directional indication. The relay will

operate only if I0 (zero sequence current derived

from the phase CTs) and IG (Ground current from

the Ground CT) have the opposite polarity, which isthe case for internal transformer faults.

The advantage of directional element is that it providessecurity against ratio errors and CT saturation duringfaults external to the protected transformer.

The directional element is inoperative if the residualcurrent (3I

0) is approximately less than 140 mA

(approx., based on 5 A CT rating). For this case,the algorithm automatically disables the directionalelement and the 87GD function becomes non-directional differential. The pickup quantity iscalculated as the difference between the correctedtriple zero sequence current (CTRCFX 3I

0) and the

ground current (IG). The magnitude of the difference

(CTRCF X 3I0- I

G) is compared to the function pickup

setting.

In order to use the 87GD function, Winding 2, 3 andWinding 4 CTs must be connected wye.

The 87GD function is automatically disabled if theground current is less than 200 mA (based on a 5 Arating).

For security purposes during external phase faultcurrents causing CT saturation, this function isdisabled any time the value of I

G is less than

approximately 0.20 amps.

■ NOTE: For higher values of CT Ratio correction,noise may create substantial differentialcurrent making higher settings desirable.

▲▲▲▲▲CAUTION: DO NOT set the Delay to less than2 cycles. In order to prevent mis-operation duringexternal faults with CT saturation conditions, atime delay of 6 cycles or higher is recommended.

CT (CTRCF) RatioCorrection Factor = Phase C.T. Ratio Ground C.T. Ratio

■ NOTE: These screens are also applicable forWindings 3 and 4.

4–61


Figure 4-38 M-3826 IPScom® (87GD) Ground Differential Current Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/F87GD Ground Differential current

COMMAND BUTTONS



4–62


Trip Circuit MonitoringExternal connections for the Trip Circuit Monitoringfunction are shown in Figure 4-39. The default TripCircuit Monitor input voltage is 250 V dc. SeeSection 5.5, Circuit Board Switches andJumpers, Table 5-3 for other available trip circuitinput voltage selections.

This function should be programmed to block whenthe breaker is open, as indicated by 52b contactinput (IN1). If the TCM is monitoring a lockout relay,a 86 contact input (INx) should be used to blockwhen the lockout relay is tripped.

When the Output Contact is open, and continuityexists in the Trip Circuit, a small current flows thatactivates the Trip Circuit Monitoring Input. If the TripCircuit is open, and the output contact is open, nocurrent flows and the Trip Circuit Monitoring Input is

3!�

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!

) %�$��

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3!

3!��,:��

,:��

Figure 4-39 Trip Circuit Monitoring Input

deactivated. An Output Contact that is welded closedwould also cause the Trip Circuit Monitoring Input todeactivate, indicating failure of the Output Contact.

When the Output Contact is closed, no current flowsin the Trip Circuit Monitoring Input. If the M-3311Ahas issued a trip command to close the OutputContact and Trip Circuit Monitoring Input remainsactivated, this is an indication that the Output Contactfailed to close.

The output of the Trip Circuit Monitoring function canbe programmed as an alarm to alert maintenancepersonnel.

Figure 4-40 Trip Circuit Monitor (TC) Setpoint Ranges

Path: Path: Relay/Setup/Relay Setpoints/TCM Trip Circuit Monitor

TCM DELAY_____________ Cycles

4–63


Pickup setting for BM W1.

Time delay until breaker contacts start to open.

Selects integration timing method. (IT or I2t)

■ NOTE: These screens are also applicable for BRKRW2,W3 and W4.

Figure 4-41 M-3826 IPScom® Breaker Monitor Setpoint Ranges

Path: Relay/Setup/Relay Setpoints/BM Breaker Monitor

COMMAND BUTTONS




BRKRW1 PICKUP1000 kA^2-cycles

BRKRW1 INPUT INITIATEi6 i5 i4 i3 i2 i1

BRKRW1 OUTPUT INITIATE08 07 06 05 04 03 02 01

BRKRW1 DELAY10.0 Cycles

BRKRW1 TIMING METHODit i2t

Breaker MonitoringThe Breaker Monitoring feature calculates an estimateof the per-phase wear on the breaker contacts bymeasuring and integrating the current or current squaredpassing through the breaker contacts during theinterruption period. The per-phase values are addedto an accumulated total for each phase, and thencompared to a user-programmed threshold value.When the threshold is exceeded in any phase, the

relay can set a programmable output contact. Theaccumulated value for each phase can be displayedas an actual value. The integration starts after a settime delay from the initiate point to account for thetime it takes for the breaker to start opening itscontacts. The integration continues until the currentdrops below 0.1 PU or 10 cycles, whichever occursfirst.

4–64


Through FaultThe Through Fault Monitor feature of the relayprovides the user with the means to capture time-stamped Through Fault current information. A“through fault” is defined as an overcurrent eventwhere the overcurrent passes through a transformerand supplies a connected circuit that is faulted.Power transformers may be subjected to ThroughFault currents, which can cause mechanicalstresses and thermal stress to winding insulation.

Figure 4-42 M-3826 IPScom Through Fault Function Setpoint Ranges

Path: Path: Relay/Setup/Relay Setpoints/Through Fault

THFLT CURRENT THRESHOLD Amps

THFLT CUM. I^2T LIMIT kA^2-cycles

THFLT PU OPERATIONS LIM. Records

THFLT WINDING SELECTwin1 WIN2 win3 win4

THFLT DELAY 1 Cycles

The Through Fault monitor data can be used topredict transformer failures facilitating correctiveaction. Recording the number and severity ofThrough Faults experienced by a transformer canaid in determining predictive maintenance practices.

The Through Fault monitor is triggered when currentin any one of the phases exceeds the set value ofthe Through Fault Current Threshold for greaterthan the Time Delay setting.

The Through Fault Threshold value is chosen to be abovethe maximum expexted load current and below theminimum expected Through Fault current.

The Through Fault Current Limit and I^2t Threshold Limitsare set based on the capability of the transformer. Thetransfomer manufacturer may be consulted for guidance.

The Through Fault Time Delay is typically set at oneCycle

4–65


IPS#1 INPUT INITIATEi6 i5 i4 i3 i2 i1

IPS#1 OUTPUT INITIATE08 o7 o6 o5 o4 o3 o2 o1

IPS#1 DELAY30 Cycles

■ NOTE: These screens are also applicable for IPSlogic Functions #2, 3, 4, 5, and 6.

The initiating inputs are user designated for each enabledIPSlogic function. The activation of one or more of theexternal contacts will start operation of the IPSlogicfunction timer.

The initiating outputs can also be set to start the IPSlogicfunctions timer. This aids in setting up special logicschemes as the output contact does not have to berouted back to the input. This also saves inputs as wellas speeds up the triggering process as the output contactdelay and input de-bounce delay no longer enter theequation.

Each enabled IPSlogic function requires a time delaysetting. Complete settings for each of the 5 remainingIPSlogic contacts (screens not shown).

Settings applicable when this function is enabled using the HMI:

IPSlogicThe relay provides six IPSlogic Functions. IPSlogicFunctions can be used to allow external devices totrip through the relay, providing additional targetinformation for the external device. More importantly,these functions can be used in conjunction withIPSlogic to expand the capability of the relay byallowing the user to define customized operatinglogic.

Programming the IPSlogic can only be implementedthrough IPScom®. IPSlogic cannot be programmedusing the Human-Machine Interface (HMI). The sixIPSlogic Functions can be activated using theHMI, but with limited logic capability. When activatedusing the HMI, the settings indicated below areapplicable. The initiating input can be any externaldevice connected to IN1*–IN6.

■■■■■ NOTE: *IN1 is pre-designated as the Breakercontact input.

4–66


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The following is an example of how to program anIPSlogic function, when programming using theHMI (see Figure 4-43):

• Initiating inputs are IN2 or IN5

• Initiating output is OUT4

• Blocking input is IN3

• IPSlogic function output is OUT6

• Time Delay of 30 cycles

The only logical limitation is that the same statusinput cannot be designated as both an initiatinginput and a blocking input. The connection for theexternal device to the input contacts is illustratedin Chapter 5, Figure 5-5, M-3311A ExternalConnections, and Chapter 6, Table 6-2, InputContacts.

4–67


Figure 4-44 M-3826 IPScom®(IPS) IPSlogic Functions Setpoint RangesPath: Relay/Setup/Relay Setpoints/IPSLogic

COMMAND BUTTONS



Settings and Logic Applicable when IPSlogicFunction(s) programmed using IPScom®

There are four initiating input sources: InitiatingOutputs, Initiating Function Trips (including theIPSlogic Functions themselves), Initiating Inputs,and initiation using the Communication Port. Theonly limitation is that an IPSlogic Function may notbe used to initiate itself. There are two blockinginput sources: Blocking Inputs and blocking usingthe Communication Port.

The IPScom IPSlogic Function programming screenand Initializing Function Trip Selection screens areshown in Figure 4-44 and 4-45, respectively.

The activation state of the input function selectedin the Initiating Function Trip dialog (Figure 4-44) isthe Tripped state, not Pickup. If the user requiresan initiating input that indicates a Pickup status,this can be achieved. Since most functions havemultiple setpoints, the second setpoint can be set

with no intentional time delay, and used as theinitiating input. The desired time delay for securityconsiderations can be obtained in the IPSlogicFunction time delay setting.

The IPSlogic Function can be programmed toperform any or all of the following tasks:

• Change the Active Setting Profile

• Close an Output Contact

• Be activated for use as an input to anotherExternal Function

Since there are six IPSlogic Functions per settingprofile, depending on the number of different relaysettings defined, the scheme may provide up to 24different logic schemes. The IPSlogic is illustratedin Figure 4-45, and the IPScom® IPSlogic Functionprogramming screen is shown in Figure 4-46.

4–68


Figure 4-45 Select Initiating Functions Screen

4–69


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4–70


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4.5 System Applications andLogic Schemes

Bus Fault ProtectionDigital feeder and transformer protection logic canbe combined together to provide high-speed busfault protection. The 50W2 function will act as adelayed overcurrent detector (see Figure 4-47). Afault detected from any feeder relay will activate aprogrammable input on the relay. This input willblock the 50W2 function from operating under normalfeeder trip conditions. If a fault occurs on the busconnected to winding 2 and none of the feeder relayshave tripped, the 50W2 function will then proceed totrip the breaker after the specified time delay.

ExampleFunction 50W2 #1 is programmed with the followingI/O settings: trip Output #2, time delay setting of 7cycles for proper coordination, and IN4 is set as aBlocking Input. This application requires no speciallogic. In this configuration all feeder relay outputcontacts will be in parallel on IN4.

4–71


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Figure 4-48 Digital Feeder Relay BackupScheme

Backup for Digital feeder Relay FailureThe M-3311A Transformer Protection Relay canprovide backup for digital feeder relays (see Figures4-48 and 4-49). The backup feature is initiated bythe closure of a feeder relay’s self-test error contact.This scheme assumes that some sort of contactmultiplying is done on the self-test outputs. Amultiplied, normally open self-test contact can beparalleled with all feeder relays to initiate the backupfeature.

ExampleIn this example, the Negative Sequence Overcurrent(46) Function is used to provide the backupprotection. Use of the 46 Function allows forsensitive backup protection independent of the loadcurrent. If the 51 Function is used, it must be set tocoordinate with the load current and results in lesssensitive protection.

This application requires no special logic toimplement. The scheme is enabled using the 46Function basic settings through a user-selectedcontrol input, configured such that the 46 Functionis blocked by an open contact. The parallel contactsfrom the feeder self-test are wired to that input (seeFigure 4-49). The negative sequence function is setto coordinate with the downstream devices of thefeeders on the protected bus.

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With no feeder alarms, the paralleled self-test alarmcontacts will all be open, and the Negative SequenceOvercurrent function blocked. When a feeder relayfails and its self-test contact closes, the NegativeSequence overcurrent function is enabled(unblocked), and the contact stream establishes atrip path to the failed relay breaker trip circuit. TheNegative Sequence relay will then provide backupprotection to the failed relay circuit.

4–72


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Figure 4-50 Two Bank Load Shedding Scheme

Load SheddingDescriptionIn stations where there are two or more transformers(see Figure 4-50), usually there is a normally opentie breaker on the secondary side. If one of thetransformers is removed from the system, the tiebreaker closes and the remaining transformers willpick up the entire load. To prevent the remainingtransformer(s) from overloading, an overcurrent loadshedding is used to remove some of the load if itexceeds a predefined level.

The IPSlogic functions can provide a cascadingtime delay feature that can be used for this loadshedding configuration. The 52b contact is wired toa relay input, which is programmed to block the50W2 Function. The output of the 50W2 Function isprogrammed to initiate the IPSlogic functions thatare associated with the load shedding configuration.Each IPSlogic function output is used to trip acorresponding feeder load or initiate voltagereduction.

ExampleThe Function 50W2 #1 basic settings provide thefirst load shedding step. The tie CB 52b contactwired in parallel with the 52a contacts of the lowside transformer breakers are programmed as acontrol input (IN2). They are configured such thatthe 50W2 #1 Function is blocked by the closedcontacts. Closing of the Bus Tie Breaker (opens52b contact) in conjunction with the opening of oneof the low side breakers (opens a 52a contact)enables (unblocks) the 50W2 #1 function.

The 50W2 #1 is programmed to Output #2, providingthe first load shedding step. Output #2 isprogrammed as an “Initiating Output” in the IPSlogicFunction providing additional load shedding steps(See Figure 4-51). Each IPSlogic function isprogrammed with a different time delay setting.

4–73


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4–74


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LTC Blocking During FaultsDescriptionThe relay contains logic to block load Tapchangersfrom operating during feeder fault conditions (seeFigure 4-52). Blocking LTC operation during feederfaults can prevent excessive tap changes, reducecontact wear and provide more predictable tripcoordination. The blocking contact can be wired tothe Auto Disable input (Beckwith M-2270B/M-2001CTapchanger control, for example) or wired in serieswith the motor power for the Tapchanger.

ExampleFunction 50W1 #2 is programmed to trip on OUT7with a pickup of 2X transformer nameplate ratedcurrent. The seal-in delay of OUT7 is programmedto 3000 cycles (50 seconds). The normally closedcontact of OUT7 is wired to the Auto Disable inputof a Beckwith Electric M-2270B/M-2001CTapchanger control. This application requires nospecial logic.

4–75


4.6 Transformer Connections

Transformer Winding SelectionThe M-3311A can be applied in either a two or threewinding transformer differential application. Forapplications where a two winding differential isrequired, the user can set the relay systemconfiguration for Two Winding and designate thewinding current that will be disabled in the 87 PhaseDifferential Current function.

Only the current input to the 87 function of thedisabled winding is not functional. All other functionsassociated with the disabled winding may be enabledif desired. If the application requires a separateovercurrent function, the user may enable the desiredovercurrent functions.

Transformer and CT ConfigurationThe M-3311A includes Standard and Custommethods of defining the transformer winding andCT configurations. The Standard and CustomConfiguration options are made available by selectingeither Disable or Enable for the Custom Mode forTransformer and CT Connection.

Standard Transformer and CT ConfigurationThe standard transformer and CT configurationselections consist of six connections for eachtransformer winding and CT configuration. Theselectable configurations are:

• Wye

• Delta-ab

• Delta-ac

• Inverse Wye

• Inverse Delta-ab

• Inverse Delta-ac

When the user selects from these connectioncombinations, the relay automatically computesthe phase and magnitude compensation requiredfor the differential currents. The general expressionfor the compensation is given below.

IA CompW

nIAW

n

IB CompW

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BW

n

IC CompW

nICW

n

Where:

• IAW

n, I

BW

n, and I

CW

n are the

uncompensated currents entering/exitingwinding “n” of the transformer.

• IA

CompWn, etc. are the compensated

phase currents after being multiplied bythe 3x3 matrix ConnectType(N).

• The ConnectType(N) is a discrete numberrepresenting the number of 30 degreeincrements a balanced set of currentswith abc phase rotation will be rotated in acounterclockwise rotation.

Types 0–11 correspond to phase shiftsof; 0°, 30°, 60°, …, 330° with a magnitudegain of 1.

Types 13–23 correspond to phase shiftsof; 0°, 30°, 60°, …, 330° with a magnitudegain of 1/S3.

The compensation calculation uses a counterclockwise rotation from zero. Therefore a Delta-abtransformer (defined as 30 degree leading) has acompensation phase angle shift of 330°, (11x30°).The Delta-ac transformer (defined as 30° lagging)has a compensation phase angle shift of 30°, (1x30°).For a system with acb phase rotation, thecompensation calculation uses a counterclockwiserotation. For users more familiar with the IECtransformer configuration nomenclature, acomparison between the IEC definitions and theBeckwith connections is provided in Table 4-4. Anexample of a ConnectType(1) or 30° compensationmatrix is illustrated below.

IA CompW

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AW

n

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Phase Angle Shift - Standard ConnectionsAll inputs are compensated against a ReferenceVector of zero degrees. The six standard connectionsreferenced previously result in 6 compensation typesfor each transformer winding and 12 compensationtypes for each CT. The transformer compensationtypes are; 0, 1, 5, 6, 7, and 11, which correspond to30 degree phase shift multiples of; 0°, 30°, 150°,180°, 210°, and 330°, all with a gain of one.

The CT compensation types consist of thosecompensation types listed above and types 13, 17,19, and 23. Type 13, 17, 19 and 23 correspond to30 degree phase shift multiples of; 30°, 150°, 210°,and 330°, but with a magnitude gain of 1/S3.

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4–76


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4–77


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When the standard connection options are used,the transformer and CT phase angle shifts arecombined and the ConnectType returns the correctcombined phase angle shift. The MagnitudeCT willcompensate for the S3 associated with deltaconnected CT’s. The shift and magnitudecompensation is defined in Table 4-5. Using areference angle of zero degrees, the Phase AWinding phase angle shift is obtained as follows:

ConnectType (Wn) = ConnectXfm (Type) +

ConnectCT (Type)

MagnitudeCT (Wn) = ConnectCT (Type)

Where:

ConnectXfm is the connection of any transformerwinding

ConnectCT is the connection of any CT

If the transformer connection is a Delta-ac/Delta-ab/Inverse wye with Wye/Delta-ab/Delta-ac CT’s,the resulting phase angle compensation shifts andCT magnitude compensation are:

ConnectType (W1) = ConnectXfm (Delta-ac) +ConnectCT (Wye)

ConnectType (W1) = 1 + 0 = 1 connect type 1 or30°

ConnectType (W2) = ConnectXfm (Wye) +ConnectCT (Delta-ab)

ConnectType (W2) = 0 + 11 = 11 connect type11 or 330°

MagnitudeCT(W2) = ConnectCT (Delta-ab)

MagnitudeCT(W2) = 23 = 1/S3

ConnectType (W3) = ConnectXfm (Inverse Wye) +ConnectCT (Delta-ac)

ConnectType (W3) = 6 + 1 = 7 connect type 7or 210°

MagnitudeCT(W3) = ConnectCT (Delta-ac)

MagnitudeCT(W3) = 13 = 1/S3

If any transformer winding is a wye with a wye CT,the ConnectType is returned as 0, (or 0°), the relayautomatically eliminates the zero sequence current.

Phase Angle Shift - Custom ConnectionsFor configurations not available in the standard sixselections, a Custom Configuration selection isavailable. The transformer phase compensation issimilar to the Standard Configuration selection.However, the transformer phase shift compensationangle does not include the CT compensation phaseshift. In the Custom Mode For Transformer and CTConnection, the user must input the actualcompensation number as defined in the CustomConfiguration Table. The CT phase and magnitudecompensation are entered as one input using theselection from Table 4-6. For reference, examplesof the transformer phase shift ConnectType numbersare indicated in Table 4-4, under the Custom column.

4–78


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4–79


Calculation of Differential & Restraint Currents

The M-3311A uses the following algorithms forcalculating the restraint and differential currents.

I restraint: IR

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conditions should equal zero. As indicated by theoperate equation, the currents must be correctlydefined as entering/exiting the relay terminals. Whenthe transformer CT polarity markings are locatedaway from the transformer input terminals, thecorrect connection of the CT leads to the relay hasthe CT leads with the polarity mark connected tothe relay input terminals with polarity mark. If atransformer CT polarity marking is toward thetransformer input terminals, the Inverse CTconnection should be chosen, or the CT leadsshould be reversed at the relay terminals.Illustrations of the proper CT input connectionsmarking are provided in the following examples.

M-3311A Connection Examples

Figure 4-53 illustrates a typical transformerdifferential application in a power plant. Theconnections and input settings required for theGSU, (Generator Step Up) and Auxiliary transformersare reviewed in detail.

Auxiliary Transformer Example (ThreeWindings)The Auxiliary Transformer is a Delta/Wye/Wye withresistance grounded wye windings, and Wye/Wye/Wye CT’s. The IEC definition of the windings isDy11y11. The Beckwith standard connection is aDelta-ac/Wye/Wye. The correct connection of theCT leads is shown in Figure 4-54. If the transformerCT polarity markings are located away from thetransformer input terminals, the correct connectionof the CT leads to the relay has the CT leads withthe polarity mark connected to the relay inputterminals with polarity mark.

If the standard transformer configuration option isselected the configuration input selections are:

Transformer Configuration W1 = Delta-ac

Transformer Configuration W2 = Wye


CT Configuration W1 = Wye

CT Configuration W2 = WyeCT Configuration W3 = Wye

If the custom configuration option is selected, theinput settings are illustrated in Figure 4-55. Thesettings are:

Transformer W1 Setting = 1


Transformer W3 Setting = 0CT W1 Setting = 0

CT W2 Setting = 0

CT W3 Setting = 0

GSU Transformer ExampleThe GSU transformer illustrated in the example is aWye/Delta/Delta with a resistance grounded wyewinding and Delta-ac/Wye/Wye CT’s. The IECdefinition of the transformer is Yd1d1. The Beckwithstandard connection is a Wye/Delta-ac/Delta-ac.The application requires an 87GD (GroundDifferential) function for the wye winding. Sinceonly Winding 2 and Winding 3 in the M-3311A havean 87GD the wye winding must be assigned to oneof these winding inputs.

In the example illustrated in Figure 4-56, the wyewinding was assigned to the M-3311A windingnumber 3. Any transformer winding may be assignedto any relay input winding as long as the polaritymarking criteria discussed previously is followed.

If the standard transformer configuration option isselected the configuration input selections are:Transformer Configuration W1 = Delta-ac

Transformer Configuration W2 = Delta-ac




CT Configuration W3 = Delta-ac

If the custom configuration option is selected, theinput settings are illustrated in Figure 4-57. Thesettings are:



Transformer W3 Setting = 0CT W1 Setting = 0

CT W2 Setting = 0

CT W3 Setting = 13

4–80


CONNECTION EXAMPLES

52

W1

W2W3

R R

R

AuxiliaryPower

Transformer

87T

87T

87T

CT2 = CT3

CT2

W1W2

W3

G

GSUTransformer

G

G

5252

5252

W3

87GD

W1

W2

87GD

W3

87GD

W2

A

BC

W3Wye

a

b

c

W1Delta-ac

a

b

c

W2Delta-

ac

1i

GSU Transformer

Y d1 d1IEC

11i

A

BC

b

c

a

b

c

a

Auxiliary Transformer

Dy 11 y11IEC

W1Delta-ac

W2wye

W3wye

Figure 4-53 Typical Transformer Differential Application

4–81


AUXILIARY TRANSFORMER EXAMPLE

IEC

11i

Dy d11 d11

A

B

C

M-3311A4544

4746

4948

A

B

C

Ι 1

R

ICW2 ICW3

IBW2 IBW3

IAW2 IAW3

5554

5756

5958

5352

3938

4140

4342 ICW2

IBW1

IAW1

Beckwith Delta-ac/Wye/Wye with Wye/Wye/Wye CTs

If W1 CT Polarity isreversed, then useInverse-wye CTconnection for W1. ORReverse CT leads at relay.

ΙA

BC

W1

b

c

a

W2

b

c

a

W3

W1 W3Ι 3

A

B

C

R

W2Ι 2

IGW2 IGW35150

Required CT Polarity

W1

W3

W2

R

Ι 2

Ι 3

Ι 1

i 1

i 3

i 2

(Phase A Connection Shown)

R

M-3311A

3938 4544 5150 5352 5958

W1

W3

W2

R

Ι 2

Ι 3

Ι 1

i 1

i 3

i 2


R

M-3311A

3938 4544 5150 5352 5958

Figure 4-54 Delta-ac/Wye/Wye CT Connection Diagram

4–82


AUXILIARY TRANSFORMER EXAMPLE

��

��

��

��

��

��

��

��

�

��

��

��

!

�

��

��

�

�

��

��

�

��

"��

��#��

��

$��%��&��

��

��

!��

�

'��#��

��

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!��

�

��#��

��

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!��

�

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Figure 4-55 Custom Settings for Delta-ac/Wye/Wye

4–83


GSU TRANSFORMER EXAMPLE

A

B

C

A

B

C

M-3311A4544

4746

4948

A

B

C

R

ICW2 ICW3

IBW2 IBW3

IAW2 IAW3

5554

5756

5958

5352

3938

4140

4342 ICW1

IBW1

IAW1

Beckwith Wye/Delta-ac/Delta-ac with Delta-ac/Wye/Wye CTs

If W3 and W4 CT Polarity isreversed, then use InverseDelta-ac CT connection. ORReverse W3 and W4 andNeutral CT leads at relay for87GD Function.

A

BC

W3

a

b

c

W1

a

b

c

W2

1i

IEC Y d1 d1

W1 W2 W3I 3I 2

I 1

A

B

C

I 4 W4

ICW4

IBW4

IAW4

6968

7170

6766

IGW3

Reversed W3 and W4 CT Connections

W3

W2

W1

R

i

i

i

i N


M-3311A

3938 4544 5352 5958 66 67

W1 W2 W3 GW3 W4

i

i

Required CT Polarity

W3

W2

W1

R

i

i

i

i N


M-3311A

3938 4544 5352 5958 66 67

W1 W2 W3 GW3 W4

i

i

Figure 4-56 Wye/Delta-ac/Delta-ac CT Connection Diagram

4–84


Beckwith: Y/Delta-ac/Delta-acIEC Description: Y d1 d11

i

Ι

b

c

a

b

c

a A

BC

REF Winding

GSU TRANSFORMER EXAMPLEBreaker and a half application

Winding #1

Winding Type dl

CT Type Y

Line Current in Degrees 300

Phase Compensation To ref winding

CCW Rotation

Relay Phase Setting 1

o

300

#2

dl

Y

00

1

300

#3

Y0

Dac

00

0

00

#4

Y0

Dac

00

0

00

CT Compensation

Phase Degrees

Magnitude no

Combined Compensation 1 00

Relay CT Setting 0

Zero Sequence Filter

no

0

1/ 3

1/ 3 300

13 13

00 00 300 300

1/ 3

1 00 1/ 3 300

Enable Disable x

Zero Sequence Filtering is applicable for grounded wye winding with wye connected CTs. Otherwise, zerosequence currents could appear in this input to relay but in no other, causing possible false trip during anexternal fault.

Figure 4-57 Custom Settings for Wye/Delta-ac/Delta-ac

Legal Information

PatentThe units described in this manual are covered byU.S. Patents, with other patents pending.

Buyer shall hold harmless and indemnify the Seller,its directors, officers, agents, and employees fromany and all costs and expense, damage or loss,resulting from any alleged infringementof UnitedStates Letters Patent or rights accruing thereform ortrademarks, whether federal, state, or common law,arising from the Seller’s compliance with Buyer’sdesigns, specifications, or instructions.

WarrantySeller hereby warrants that the goods which are thesubject matter of this contract will be manufacturedin a good workmanlike manner and all materialsused herein will be new and reasonably suitable forthe equipment. Seller warrants that if, during aperiod of five years from date of shipment of theequipment, the equipment rendered shall be foundby the Buyer to be faulty or shall fail to peform inaccordance with Seller’s specifications of theproduct, Seller shall at his expense correct thesame, provided, however, that Buyers shall ship theequipment prepaid to Seller’s facility. The Seller’sresponsibility hereunder shall be limited to replace-ment value of the equipment furnished under thiscontract.

Seller makes no warranties expressed or impliedother than those set out above. Seller specificallyexcludes the implied warranties of merchantibilityand fitness for a particular purpose. There are nowarranties which extend beyond the descriptioncontained herein. In no event shall Seller be liable forconsequential, exemplary, or punitive damages ofwhatever nature.

Any equipment returned for repair must be sentwith transportation charges prepaid. The equipmentmust remain the property of the Buyer. The afore-mentioned warranties are void if the value of theunit is invoiced to the Seller at the time of return.

IndemnificationThe Seller shall not be liable for any propertydamages whatsoever or for any loss or damagearising out of, connected with, or resulting fromthis contract, or from the performance or breachthereof, or from all services covered by or furnishedunder this contract.

In no event shall the Seller be liable for special,incidental, exemplary, or consequential damages,including but not limited to, loss of profits orrevenue, loss of use of the equipment or anyassociated equipment, cost of capital, cost ofpurchased power, cost of substitute equipment,facilities or services, downtime costs, or claims ordamages of customers or employees of the Buyerfor such damages, regardless of whether said claimor damages is based on contract, warranty, tortincluding negligence, or otherwise.

Under no circumstances shall the Seller be liablefor any personal injury whatsoever.

It is agreed that when the equipment furnishedhereunder are to be used or performed in connec-tion with any nuclear installation, facility, oractivity, Seller shall have no liability for anynuclear damage, personal injury, property damage,or nuclear contamination to any property located ator near the site of the nuclear facility. Buyer agreesto indemnify and hold harmless the Seller againstany and all liability associated therewith whatso-ever whether based on contract, tort, or otherwise.Nuclear installation or facility means any nuclearreactor and includes the site on which any of theforegoing is located, all operations conducted onsuch site, and all premises used for such opera-tions.

Notice:Any illustrations and descriptions by BeckwithElectric Co., Inc. are for the sole purpose ofidentification.

The drawings and/or specifications enclosed hereinare the proprietary property of Beckwith ElectricCo., Inc., and are issued in strict confidence;therefore, shall not be used as a basis of reproduc-tion of the apparatus described therein withoutwritten permission of Beckwith Electric Co., Inc.

No illustration or description contained hereinshall be construed as an express warranty ofaffirmation, promise, description, or sample, andany and all such express warranties are specificallyexcluded nor shall such illustration or descriptionimply a warranty that the product is merchantableor fit for a particular purpose. There shall be nowarranties which extend beyond those contained inthe Beckwith Electric Co., Inc. terms of sale.

All rights reserved by Beckwith Electric Co., Inc. No reproduction may be made without prior written approvalof the Company.

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BECKWITH ELECTRIC CO., INC.6190 - 118th Avenue North • Largo, Florida 33773-3724 U.S.A.

PHONE (727) 544-2326 • FAX (727) 546-0121E-MAIL [email protected] PAGE www.beckwithelectric.com

© 2007 Beckwith Electric Co.Printed in USA

800-3311A-IB-00MC2 03/08

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