mpr3e5 technical manual issue 4, july 2010 - p&b · pdf filepage 3 mpr3e5 technical manual...

MPR3E5 Technical Manual

Issue 4, July 2010


Issue 4, July 2010

Contents 1. P&B MPR3E5.....................................................................................................................................................................................................1

1.1 Protective Functions. ...................................................................................................................................................................................2 1.2 Displayed Drive Data...................................................................................................................................................................................2 1.3. Displayed Drive Status. ..............................................................................................................................................................................2 1.4. Control Functions. ......................................................................................................................................................................................2

2. Technical Specification. ......................................................................................................................................................................................3 3. Environmental Tests. ..........................................................................................................................................................................................4 4. Inputs and Outputs. ............................................................................................................................................................................................5

4.1. Power Supply Live......................................................................................................................................................................................5 4.3. Current Transformer Inputs. .......................................................................................................................................................................5 4.4. Output Relays.............................................................................................................................................................................................5 4.5. Digital Inputs. .............................................................................................................................................................................................5 4.6. RS485 Rear Port. .......................................................................................................................................................................................5 4.7. RS232 Front Port. ......................................................................................................................................................................................5

5. Faceplate Functions. ..........................................................................................................................................................................................6 5.1. LED Status. ................................................................................................................................................................................................6

6. LCD Display. ......................................................................................................................................................................................................7 6.1. Menu Screens. ...........................................................................................................................................................................................7 6.2. Display Scroll..............................................................................................................................................................................................8 6.3. Motor Settings. ...........................................................................................................................................................................................9

CT Primary...................................................................................................................................................................................9 Full Load Current (FLC). ..............................................................................................................................................................9 Actual Running Current (ARC). ....................................................................................................................................................9 E/F Primary. .................................................................................................................................................................................9

6.4. Serial Settings. .........................................................................................................................................................................................10 6.5. Protect Settings. .......................................................................................................................................................................................12

Function. .............................................................................................................................................................................................................13 Alarm. ..................................................................................................................................................................................................................13 Trip. .....................................................................................................................................................................................................................13 Auto Reset. .........................................................................................................................................................................................................13 Panel-Reset.........................................................................................................................................................................................................13 Remote-Reset. ....................................................................................................................................................................................................13

6.5.1. Maximum Start Time. .......................................................................................................................................................................14 6.5.2. Thermal Model. ................................................................................................................................................................................14 6.5.3. Too Many Starts...............................................................................................................................................................................16 6.5.4. Undercurrent. ...................................................................................................................................................................................16 6.5.5. Overcurrent / Stall. ...........................................................................................................................................................................17 6.5.6. Negative Phase Sequence. ..............................................................................................................................................................17 6.5.7. Earth Fault. ......................................................................................................................................................................................17 6.5.8. Load Increase. (Low Set Overcurrent)..............................................................................................................................................18 6.5.9. Single Phase....................................................................................................................................................................................18 6.5.10. Unbalance Current. ........................................................................................................................................................................18 6.5.11. Short Circuit ...................................................................................................................................................................................19 6.5.12. Contactor Fault...............................................................................................................................................................................19 6.5.13. Serial Timeout. ...............................................................................................................................................................................19 6.5.14. Internal Error. .................................................................................................................................................................................19 6.5.15. Phase Rotation...............................................................................................................................................................................20 6.5.16. Serial Inhibit. ..................................................................................................................................................................................20

6.6. MPR3E5 Motor Starting............................................................................................................................................................................21 6.7. I/O Settings (Input / Output Settings). .......................................................................................................................................................22

6.7.1 Digital Inputs .....................................................................................................................................................................................22 Reset Fault.................................................................................................................................................................................22 Block Input. ................................................................................................................................................................................22 Speed Switch. ............................................................................................................................................................................22

6.7.2 Relay Outputs ...................................................................................................................................................................................22 Trip.............................................................................................................................................................................................22 Trip Fail Safe..............................................................................................................................................................................22 Alarm. ........................................................................................................................................................................................23 Alarm Fail Safe...........................................................................................................................................................................23 Inhibit. ........................................................................................................................................................................................23 Inhibit Fail Safe. .........................................................................................................................................................................23 Healthy.......................................................................................................................................................................................23 Healthy Fail Safe........................................................................................................................................................................23 Aux Trip .....................................................................................................................................................................................23 Internal Fail. ...............................................................................................................................................................................23

6.8. System Settings. ......................................................................................................................................................................................24 6.9. Trip History...............................................................................................................................................................................................26 6.10. Alarm History..........................................................................................................................................................................................26 6.11. Last Fault. ..............................................................................................................................................................................................26 6.12. Stats Info. ...............................................................................................................................................................................................27


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6.13. Calibration Menu. ...................................................................................................................................................................................27 6.14. Smart Card Settings (OPTIONAL). .........................................................................................................................................................28

7. Menu Tree Structure.........................................................................................................................................................................................29 8.1. MPR3E5 System Settings Summary..............................................................................................................................................................30 8.2. MPR3E5 Control Setting Summary................................................................................................................................................................31 8.3. MPR3E5 Protection Setting Summary. ..........................................................................................................................................................32 8.4. MPR3E5 Blank Protection Setting Summary..................................................................................................................................................33 Appendix 1 ...........................................................................................................................................................................................................34 MPR3E5 Installation. ............................................................................................................................................................................................34 Appendix 2 ...........................................................................................................................................................................................................35 Termination Numbers. ..........................................................................................................................................................................................35 Appendix 3 ...........................................................................................................................................................................................................36 MPR3E5 Schematic Diagrams. ............................................................................................................................................................................36 Appendix 4 ...........................................................................................................................................................................................................37 Thermal Overload Curve. .....................................................................................................................................................................................37 Appendix 5 ...........................................................................................................................................................................................................38 Thermal Overload Trip Times. ..............................................................................................................................................................................38 Appendix 7 ...........................................................................................................................................................................................................42 Handling Guidelines. ............................................................................................................................................................................................42


Issue 4, July 2010

1. P&B MPR3E5

P&B Protection Relay's MPR3E5 is a highly sophisticated microprocessor based motor protection unit, specifically designed to be used as an integral part of any type or manufacture of Motor Control Centre. MPR3E5 provides total protection and monitoring of LV and MV motor starters with 1ms time stamping of events. MPR3E5 monitors the motor current by means of conventional ring type current transformers with typically 1A or 5A secondary outputs. This measured current is then used by the MPR3E5 to determine tripping or alarm functions in order to interrupt the main switching device and protect the motor from overload and damage. The MPR3E5 is a withdrawable, easily installed package. The MPR3E5 can be used as a direct replacement for older MPR3E5 relays by removing the relay module from the switchgear mounted casing and fitting the new MPR3E5 in its place without the need for any wiring changes. All setting parameters are programmed independently for each unit via the integral keypad and liquid crystal display on the front plate or via any of the communication ports and PC based software package available for the Vision series of products. MPR3E5 can be configured to support most motor starter applications, protective functions can be individually configured to enable or disable the tripping and alarm functions. Tri-Colour Light Emitting Diodes mounted on the front plate give immediate visual indication of the motor status i.e. RUNNING / INHIBIT / HEALTHY and ALARM / FAULTY / HEALTHY conditions. The MPR3E5 can also be integrated onto an RS485 based network. This allows measured, statistical and status information from the relay to be reported to a remote central communicating system. Pages 30 to 33 can be used as a template for your relay settings schedule. Note: The thermal overload curve extension explained in this manual is applicable from software version 0.006 and above. The overload curve responds definite time above 6x FLC for earlier software versions.


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1.1 Protective Functions.

Max Start Time Protection Thermal Overload Protection with adjustable t6x and hot/cold ratio and fixed pre alarm Undercurrent Protection Overcurrent Protection Single Phase Protection Phase Unbalance Protection Earth Fault Protection Excess Number of Starts Protection Short Circuit Protection Serial Timeout Protection Internal Error Protection Load Increase (Low Set Overcurrent) Negative Phase Sequence Phase Rotation

1.2 Displayed Drive Data.

Negative Seq. Current Individual Phase Currents Average Three Phase Current Earth Fault Current Percentage Motor Load Percentage Thermal Capacity Alarm Description Trip Description Inhibit Description

1.3. Displayed Drive Status.

Running / Starting / Stopped / Inhibit Motor Status Alarm Status Trip Status Inhibit Status Digital Input Status

1.4. Control Functions.

Via Hardwired inputs: Via Keypad Via Comms input: Block, Reset Reset Reset


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2. Technical Specification.

Power Supply.

AUXILIARY POWER SUPPLY & LOW VOLTAGE POWER SUPPLY AC Nominal Range 80 – 265V AC / DC

Range 24V AC / 24-48V DC (Low Voltage Power Supply Optional Extra)

Frequency 45 - 65 Hz

Maximum Power Consumption 10VA, 15VA Nominal

Measurement. PHASE CURRENT MEASUREMENT Method True RMS, Sample time <1ms

Range 0.1 to 16x Phase CT Primary Amps

Full Scale 16 x Phase CT Primary Amps Setting

Accuracy ± 3% at Phase CT Primary amps

EARTH PHASE CURRENT MEASUREMENT Method True RMS, Sample time <1ms

Range 0.05 to 2.0x E/F CT Primary Amps

Full Scale 2.0 x E/F CT Primary Amps Setting

Display Accuracy ± 3% of Reading Over Range

Pick Up accuracy ± 3% of setting

Protection Functions. OVERLOAD ALARM AND TRIP CURVES Fault Time Accuracy ± 40mS up to 10 seconds

± 2% of trip time over 10 seconds

Threshold Current Level Overload Setting ± 2%

CURRENT UNBALANCE ALARM AND TRIP Method Unbalance = 100 x (Imax - Imin) / Ir %

Where Imax = max. of 3 phase currents Imin = min. of 3 phase currents Ir = Larger of Imax or Motor FLC

Alarm Threshold Unbalance Level 50% of Unbalance current ± 2%

Alarm Fixed Time Delay Accuracy 1.0 ± 0.5 seconds

Trip Threshold Unbalance Level Unbalance Current Setting ± 2%

Trip Time Accuracy ± 1 second up to 10 seconds

± 1 second +/- 2% above 10 sec.

TIME DELAYS Accuracy ± 0.5 seconds or ± 2% of time

Exceptions

Earth Fault Trip +150mS,-0.0@ 1.1 x setting +60mS,-0.0@ 2 x setting +40mS,-0.0@ 5 x setting

Total Run Time Accuracy ± 2%

Relay Contacts Ratings. OUTPUT RELAYS Rated Load 10A @ 250 AC

10A @ 30V DC

Maximum Breaking Voltage 250V AC

Max Making Current (max. 4s at duty cycle 10%) 35A

Max Breaking Capacity AC 2500VA

Max Breaking Capacity DC 600mA @ 110V DC 100mA @ 220V DC


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3. Environmental Tests.

CLIMATIC TEST STANDARD SEVERITY LEVEL

Temperature Dry Cold Operational

IEC 60068-2-1 -20 deg C ,96 hrs

Temperature Dry Cold Transportation & Storage

IEC 60068-2-1 -40 deg C , 96hrs

Temperature Dry Heat Operational

IEC 60068-2-2 +60 deg C , 96 hrs

Temperature Dry Heat Transportation & Storage

IEC 60068-2-2 +85 deg C , 96 hrs

Damp Heat Steady State

IEC 60068-2-30 95% Non-condensing, Cyclic Test Db

Enclosure IEC 60529 front IP52 , rear IP00

MECHANICAL

Vibration IEC 60255-21-1 Class I

Shock & Bump IEC 60255-21-2 Class I

Seismic IEC 60255-21-3 Class I

ELECTRICAL

Insulation resistance IEC 60255-5 500 Vdc , 5 secs

Dielectric Test IEC 60255-5 Series C of table 1 2.5 kV 50Hz , 1 min 1.0 kV open contacts , 1 min

High Voltage Impulse IEC 60255-5 5 kV peak 1.2/50uS,0.5J 3 pos , 3 neg

Voltage Dips , Short Interruptions & Voltage variations immunity

IEC 60255-11 IEC 61000-4-11

3 dips & 3 interruptions at 10 sec intervals of duration between 10mS and 500mS at zero crossings. Variations 40% &70%

Ripple in dc supply IEC 60255-11 12% ac ripple

VT input Thermal Withstand

120% Vn , continuous

CT input Thermal Withstand

250xIn half wave,100xIn for 1 second 30 xIn for 10 second , 4 xIn cont.

ELECTROMAGNETIC COMPATIBILITY

Electrical fast Transient/Burst

IEC 60255-22-4 IEC 61000-4-4

Class IV-4.0kv Power supply Class III -2.0 kV Other inputs 1 min each polarity

Oscillatory Waves 1 Mhz Burst

IEC 60255-22-1 Class III Longitudinal 2.5 kV , 2sec Transverse 1.0 kV , 2 sec

Electrostatic Discharge IEC 60255-22-2 Class II 6 kV contact 8kV air discharge , 10 discharges at 1 sec intervals

Conducted Disturbance RF fields

IEC 61000-4-6 0.15 to 80 Mhz Severity Level 10Vrms +sweeps 0.05-0.15MHz & 80-100MHz

Radiated e-m field from digital portable telephones

ENV 50204 900 & 1890mhz at 10V/m

Radiated RF e-m field immunity test

IEC 60255-22-3 ClassIII test method A +sweep 500-1000mhz or IEC 1000-4-3 80-1000mhz severity 10V/m 80% modulated 1 kHz

Surge Immunity IEC 61000-4-5 4kV common mode 2kV differential mode , 1.2/50uS

Power Frequency Magnetic Field

IEC 61000-4-8 1000A/m for 1 sec 100A/m for 1 minute

Pulse Magnetic Field IEC 61000-4-9 6.4/16uS , 1000A/m

Damped Oscillatory Magnetic Field Immunity

IEC 61000-4-10 0.1 & 1.0 Mhz , 100A/m

Conducted & Radiated RF Interference Emission

EN55022 or EN55011or EN50081-2

Class A interference limits

Power frequency conducted immunity, common mode

IEC 61000-4-16 IEC 60255-22-7

DC to 150kHz sweep test level 4 300V at 16 2/3 & 50/60Hz


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4. Inputs and Outputs.

4.1. Power Supply Live.

The MPR3E5 requires a permanent AC or DC Voltage to supply the unit as specified by the relay rating label. This auxiliary live is also used as the source voltage to power the digital inputs.

4.3. Current Transformer Inputs.

The MPR3E5 has provision to allow connection of standard protection class 1 amp or 5 amp secondary rated current transformers with 1-2.5VA. The Earth fault measurement can either be a residual connection from the three phase CT’s, or more commonly via a CBCT.

4.4. Output Relays.

The MPR3E5 has 4 output relays which can be assigned depending upon the required function. Each output relay is a changeover contact with Common (C) and Normally Open (NO) and Normally Closed (NC) contacts.

4.5. Digital Inputs.

The MPR3E5 has 2 digital inputs which provide an indication of statuses to the relay of the motor starter condition. The condition of all these inputs can be viewed at any time via the Display Scroll page of the relay, this enables complete wire checking without the need to disconnect or even gain access to the rear panel wiring. The source voltage for the digital inputs is derived from the auxiliary power supply, when power is connected, these terminals will be live.

4.6. RS485 Rear Port.

The RS485 port utilises a half duplex RS485 protocol allowing up to 32 units to be daisy-chained together with a single shielded twisted pair cable. The MPR3E5 provides high-speed data acquisition to supervisory computers to form a complete motor management system. The host system can interrogate the unit to monitor motor status, running conditions, historical data and fault data as well as control functions such as reset of fault / alarm conditions. Setting parameters may also be changed or read. The MPR3E5 is available with P&B network gold (P&B protocol) installed for use with the Xcell Data Concentrator for fully Integrated Protection, Control & Monitoring Systems with full dual redundancy or with a Slave implementation of Modbus RTU protocol for small systems and direct Modbus access to devices where data concentration is not required.

4.7. RS232 Front Port.

The front mounted RS232 port allows access to historical and running data without disturbing the rear RS485 network. This port can be used for direct programming.


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5. Faceplate Functions.

The MPR3E5 faceplate has been designed to provide an intuitive easy to use display allowing access to all the required information an operator would require. This is achieved by using tri colour LED indications and a LCD display driven by 4 function keys. The concept eliminates the need for additional indication devices on the front of the motor starter panel such as Lamps, Ammeter, Voltmeter, Hours Run Indicator, Operations Counter, etc. Helping to reduce the overall cost of the motor starter panel and giving improved reliability by the reduction of separate components.

5.1. LED Status.

The LED's operate as follows:

LED Colour Left Hand LED – Motor Status Right Hand LED – Fault Status

GREEN Healthy Healthy

AMBER Inhibit Alarm

RED Running Fault

Two line LCD Display

Selector button for right hand menu options

Up/Down Scroll keys. For scrolling through menus or increasing/ decreasing values

RS232 Front Connection

Left Indicator LED “motor status”

Selector button for left hand menu options

Right Indicator LED “fault status”

Motor Settings

Y Top


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6. LCD Display.

The MPR3E5’s interface is fundamental to the philosophy of the Vision relay family of devices. The screen provides access to all dynamic and historical data and protection parameters.

6.1. Menu Screens.

Upon power up the MPR3E5 software version screen appears for a few seconds. The screen shows the software version and the unit type, which should be noted in all correspondence regarding the relay. After the Introduction screen disappears then the initial display scroll page appears. The four push buttons are used to navigate to areas of the menu structure. Using these soft-keys provides for a very easy to use environment to effectively navigate the entire menu system. Any description in the LCD window appearing to the LEFT in CAPITALS can be selected using the left hand push button. Any description in the LCD window appearing to the RIGHT in CAPITALS can be selected using the right hand push button. Otherwise the bottom right hand portion of the LCD is reserved for displaying status messages; STARTING, RUNNING, STOPPING, ACTIVE FLT. The centre push buttons are used to scroll the LCD window to display different menu prompts or data. Whilst the MENU prompt remains to the bottom left portion of the LCD, the up and down push buttons can be used to select different pages of measured or status data, this is referred to as display scroll. Any one of those display scroll pages can be selected as the default page, meaning if the unit is left in a sub menu – it would automatically return to the pre-selected page within the display scroll after an adjustable period of time

MPR3E5

SW Version x.xxx 0.0A I1 Trip

MENU


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0AMENU

Healthy Protection SettingsY Top

6.2. Display Scroll.

Examples of the Display Scroll screens. Selecting the <MENU> button allows access in to the sub menu and settings structure. The <UP> and <DOWN> buttons scroll through each sub menu heading. The left button selects entry to each level. The right button <TOP> restores the screen to the display scroll and menu prompt.

0.00A I1 Hlthy Menu

0.00A I2 Hlthy Menu

0.00A I3 Hlthy Menu

0.00A Av Hlthy Menu

0.00A In Hlthy Menu

0.00A Io Hlthy Menu

ML 80% Hlthy Menu

TC 10% Hlthy Menu

DI1 OFF Menu

DI2 OFF Menu

Tr Normal Menu

Al No Alarm Menu

Ih No Inhibit Menu

Motor Running Menu

Test Mode No Menu

Motor SettingsY Top


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6.3. Motor Settings.

This screen allows access to the Motor Settings of the relay. The CT Primary, EF CT Primary, FLC and ARC can all be viewed and set. The list of values that are available to be changed can be scrolled through by pressing the UP and DOWN buttons.

A value can be selected to have its value changed by pressing the Y button when the value is highlighted. This then brings up the VALUE CHANGE SCREEN

The Value Change pop-up allows you to alter settings in specified steps within the minimum and maximum values of the particular setting range. The UP and DOWN arrow buttons are used to alter the value. The Next function is used to skip along to the next character. Save is pressed to store the new value and exit.

If an undesired value is inserted incorrectly use the Next button to skip past the last character to the left. The Save option button now operates as a Discard to dump the new value without saving – reverting back to the original value on initial selection.

CT Primary.

This setting allows the user to program the primary current rating of the protection class current transformers on the supply phases. It is assumed that all phase current transformers are of the same rating. There is no need to enter the current transformer secondary rating as the MPR3E5 is pre-programmed depending on whether the relay has been purchased with a 1A or 5A CT input.

Full Load Current (FLC).

The FLC is the motors continuous maximum Full Load Current rating as provided in the motor manufacturers data. The settable range is 25-200% of the ‘CT Primary’ setting. The ‘FLC’ setting enables all protective functions except Undercurrent and Load Increase to be set in terms of a percentage of FLC and enables the MPR3E5 to display the “Motor Load” in terms of a percentage a FLC.

Actual Running Current (ARC).

This setting allows the user to program the motors Actual Running Current when supplying a typical load at normal speed. This value is typically less than the motor FLC rating and enables the protective functions (Under Current and Load Increased) to be set in terms of a percentage of this value.

E/F Primary.

This setting allows the user to program the primary current rating of the protection class current transformer used to measure the earth fault current If a residual current transformer connection is used to detect earth fault then the same setting as for CT Primary should be used.

CT PrimaryY N1000A

Motor SettingsY Top

CT PrimaryY N1000A

Data =Save Next

001000


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6.4. Serial Settings.

This screen allows the configuration of the communication ports.

Serial Enabled / Disabled. This setting allows the user to enable the MPR3E5 serial communications port. This setting must be set to ‘Enable’ if communication with the relay through any serial link is required. Drive Number. This setting range 1 to 32, with a default setting of 1, identifies the MPR3E5 unit to the Xcell unit (or any Master device connected to the Data highway) to which the RS485 port is connected. When updating firmware the auto program mode requires the drive number to be 1. RS485 Baud Rate. This setting allows the user to configure the appropriate communications baud rate such that the MPR3E5 can communicate effectively on the Data Highway to which it is connected. RS232 Baud Rate. This setting allows the user to configure the baud rate for the front mounted RS232 port. Serial Delay. The MPR3E5 may be configured to respond to a request for information from the serial port instantly or after a designated delay. A communications delay may be beneficial to ensure the Master device on the Data Highway receives all information sent back by the MPR3E5 without enduring data collisions on the network. Fast Scan 1 to 3. A Fast Scan is a system used when operating in conjunction with the XCell Data Concentrator. As the XCell polls relays attached on its network, the fastscan settings allows the user to select important data to be read at a quicker rate. The data on the communications link is broken into Fast Scan Data (or Process Critical Data) and Slow Scan or Full Read Data (Electrical Engineering Data). The configuration of Fast Scan is not necessary unless the MPR3E5 in used in conjunction with the XCell unit. Each Fast Scan number can be programmed to export important data when requested. This number references an internal address in MPR3E5 and allows configurable data mapping between units. Typical data could be Average Phase Current, Motor Load and so on..

Serial SettingsY Top

SerialY NEnabled


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Max Scan Time. This setting need only be used in order to limit the amount of data traffic on a RS485 network. Dynamic data can change rapidly, this setting allows the MPR3E5 to limit the number of updates it makes to its Fast Scan values. RS485 Protocol. The RS485 serial communications port may be configured to operate using a slave implementation of Modbus RTU® or P&B Engineering’s own protocol “P&B Standard”. RS232 Protocol. The RS232 serial communications port may be configured to operate using Modbus RTU® or P&B Engineering’s own protocol “P&B Standard”. RS485 Parity. This setting allows the user to set the parity to match that of the host system on the serial link. The options are “Odd”, “Even” and “None”. RS232 Parity. This setting allows the user to set the parity to match that of the host system on the serial link. The options are “Odd”, “Even” and “None”. Serial Timeout Protection. This setting is a protective function and is described in detail in section 6.5


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6.5. Protect Settings.

This sub menu allows the user to configure all of the current based protective functions:

DISPLAYED: FULL DETAIL: Start Time Maximum Start Time Thermal Thermal Model Too Many Starts Too Many Starts < Current Under Current > Current Over Current >Inps Negative Phase Sequence Earth Flt Earth Fault Load Inc Load Increase Sgl Phase Single Phase Unbal. Unbalance Short Circ. Short Circuit Contactor Fault Contactor Fault Phase Rot Phase Rotation Ser Tmout Serial Timeout Int Err Internal Error

Each function can be set to Alarm and / or Trip and / or Block or left as an unused function, disabled. The resets for each are protective function are independently configurable as are the trip levels and trip times. The protective function actions are as follows:

Disabled Protection Disabled Alarm Alarm Enabled Trip Trip Enabled Alarm & Trip Alarm & Trip Enabled Block Block Enabled Alrm & Blck Alarm & Block Enabled Trip & Blck Trip & Block Enabled A&T&B Alarm, Trip and Block Enabled

The reset options are as follows; Using the UP and DOWN keys the data can be changed to one of the following;

Panel Panel reset only Serial Serial reset only S P Serial or Panel reset Remote Remote reset only R P Remote or Panel reset R S Remote or Serial reset R S P Remote or Serial or Panel reset AUTO Auto reset

Protect SettingsY Top

StartTime ActionY NDISABLED

Max Start ResetY NDISABLED

DATA=DISABLEDSave Discard


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Each protection function is configurable independently of the others. The available action, the type of reset, the various threshold levels and trip timers for each and every protection function can be found in section 6.5. This section describes in detail what each function does and how it operates. Function. If a particular function is required for a protective use it should be selected and set to the required action. If a particular function is not required it should be left disabled. The display will show DISABLED next to the function name. If a function is disabled then the threshold level and trip times will not impact the activity of the relay. Alarm. An Alarm is considered as a high level function. If the function activates it will be recorded as part of the alarm history and cause MPR3E5 to enter an alarm state; the alarm fault will be displayed in the main display scroll page and the right hand LED will give an alarm indication (amber colour). If an output relay is set as Alarm it will change state with the fault. Trip. A Trip is considered as a high level function. If the function activates it will be recorded as part of the trip history and cause the MPR3E5 to enter a trip state; the fault will be displayed in the active faults page and the unit will automatically display that page, the right hand LED will give a Trip indication (red colour). If an output relay is set as Trip it will change state with the fault. Block. In order for block to operate the function must be configured and a digital input also assigned as block. When the digital input is energised this will prevent the protective function from operating against breach of threshold and trip time. Reset. The configuration of the reset allows that particular protection function to be cleared or reset to a healthy condition providing the condition that caused the fault, alarm or inhibit has been removed. Auto Reset. This option, when enabled, automatically resets the fault when the situation that caused the trip has been removed. If Auto Reset is selected the other reset options are not required. Panel-Reset. This option, when Enabled, allows a reset of a fault to be carried out from the front panel of the relay. A reset button will be displayed in the top right hand corner of the main display scroll page, if any fault has been removed and is enabled for a panel reset. Serial-Reset. This option, when Enabled, allows a reset of a fault to be carried out through the serial communication port of the relay. Remote-Reset. This option, when Enabled, allows a reset of a fault to be carried out through a digital input to the relay. A digital input must be set to Reset Faults and must be closed after the fault condition has been removed in order for the reset to operate.


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6.5.1. Maximum Start Time.

When starting a motor a starting sequence must be completed before the MPR3E5 will register the motor as “Running”. For this sequence to be complete the starting current must exceed 150% of the programmed motor full load current (FLC) then fall to or below 125% FLC. The Maximum Start Time protection feature may be configured to allow a maximum time for the motor to complete the starting sequence. If the motor has not been registered as “Running” before the expiry of the programmed timer then the unit may be configured to trip, alarm or indicate as a result. Trip Time. This setting determines the maximum time that the motor is allowed to take to complete it's starting sequence. The starting sequence ends when the current falls to under 125% of FLC at which point the message "Running" appears on the screen.

6.5.2. Thermal Model.

The Thermal Model protection is arguably the most fundamental feature in any motor protective relay. This is implemented as a software model of the electromechanical overload operation of the heating element and bimetallic coil which became the method of safely protecting rotating electrical plant.

The Thermal Model protection cannot be switched off, that means even with incorrect settings the relay would try and offer some protection in an overloaded condition.

In order for this protection to operate successfully a motor is assumed to have a “thermal capacity” or TC. In its simplest terms, a motor start from standstill using a DOL method will absorb 6x its full load current (FLC) in order to magnetise and establish a magnetic field. Once the Motor overcomes its initial inertia and begins to rotate, the inrush current decreases until the motor reaches its nominal rotating speed and draws a continuous current, FLC. Once the TC reaches 100% a trip occurs. From standstill, with a thermal capacity of zero (referred to as the Cold Condition) a motor has 100% of its TC available to start. If the inrush of 6X FLC remained steady (stalled rotor) the time taken to absorb 100% TC and a trip would be equal to the t6x setting. This is called the basic thermal characteristic. The graph, right, shows multiples of FLC against the operating time. The Thermal model curve remains DT above 6x to allow for fuse discrimination unless configured otherwise. I.E. An overload of 7 or 8x would trip in the same time as that for 6x (see Appendix 5). Assuming t6x = 1: If a 2x inrush, from cold (0%) occurred the resultant trip time would be 10s.


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Pre-Alarm If Enabled an Alarm is called when the Thermal Capacity reaches the set limit. When it reaches 100% a Trip is called. The Pre-Alarm can be disabled, where as the Trip cannot. When a motor successfully starts and maintains normal a FLC its TC increases to a steady state condition which is determined by the Hot / Cold ratio (H/C). If an overload occurred from this steady state condition the trip time is faster as the motor has already absorbed some thermal capacity up to its steady state (referred to as the Hot Condition). How much it has absorbed is dependant upon the withstand times of the motor or, its H/C ratio. Hot/Cold Ratio. The H/C ratio is calculated from the motor manufacturers’ data, overload times are quoted both from a stand still (cold) overload and for a running (hot) overload. The Hot withstand time divided by the Cold withstand time gives us a ratio. This ratio, expressed as a percentage, then equates to a steady state running condition. i.e.

% Hot / Cold Ratio Setting 80 70 60 50 40 30 20

Steady State % Thermal capacity Running At 100% FLC

17 26 35 44 52 61 69

Available % Thermal Capacity For Overloads

83 74 65 56 48 39 31

If we take a ratio of 60%. After a start and after running at FLC we reach the steady state thermal capacity of 35%, we have 65% TC remaining and available before a trip occurs, if an overload did occur the trip time is determined by the multiple of the overload condition (2x, 3x FLC etc) and the t6x setting. The overload level for MPR3E5 has a fixed pick-up of 105% of FLC, therefore the current must be in excess of this value for the thermal capacity to increase towards 100%. During the start and run-up of a motor the absorbed TC is generally more than the steady state TC, so it does not follow that with a H/C ratio of 50% and 44% running TC that a second start would be permitted. A second start could only take place once sufficient TC is available. The unit may enter an inhibit mode to prevent a start. The stats page under the Data menu indicates the TC absorbed during the last start. Thermal Capacity is retained in non volatile memory to avoid resetting on a power down. Cool Time Factor. The time taken for TC to decrease is usually longer than the heating constant as motors generally dissipate absorbed TC by radiation. The Cool Time Factor should be set according to the ratio of the motor cooling time constant at standstill divided by the heating time constant when running at normal speed. The higher the value of this setting the longer it will take for the thermal capacity to reduce to the level required to enable a restart.

t6x. This setting defines the basic thermal characteristic, the trip time for a 6x FLC overload condition from 0% absorbed TC. In real terms, the trip time for a continuous 6x overload from 0% to 100% will equate directly to the t6x setting. (i.e. if t6x is set at 10, the trip time will be 10 seconds)


Issue 4, July 2010

The formulas below describe how the thermal model operates from cold and hot. Cold Condition

where; ‘p’ is the multiple of FLC ‘a’ is the t6x setting ‘tc’ is the operating time (in seconds)

Running (Hot) Condition

‘IL’ is the steady state prior to overload (If motor is running at FLC IL = 1) ‘H/C’ is the hot cold ratio expressed as a decimal i.e. 40% = 0.40

A trip time table for overload level with respect to the H/C condition is given in Appendix 4. An application example showing how the Thermal Model settings are calculated is available on our website: www.pbsigroup.com

6.5.3. Too Many Starts.

The MPR3E5 will inhibit and can be configured to indicate as a result of too many starts occurring. It is often desirable to prevent multiple starts of a drive particularly if it is the cause of stability problems on the power system. No reset type is available. The inhibit will auto-reset after the selected time delay has elapsed. Only then can a start can then be made. Starts per Hour. The number of allowable starts before actively inhibiting further starts from being made. Start Inhibit Time. Once the number of starts has been exceeded, the start inhibit time will inhibit the relay and prevent the motor from being restarted until the timer has expired, as such point the number of starts permitted per hour is also reset.

6.5.4. Undercurrent.

The MPR3E5 may be configured to trip, alarm and/or indicate as a result of an undercurrent condition, usually the result of loss of load. Undercurrent protection is disabled during STARTING and in TEST MODE. Trip Level. The undercurrent pickup is set as a percentage of the Actual Running Current (ARC) which is the typical loaded current of the motor. The undercurrent pickup should be set higher than the unloaded current the motor may be subject to. If the measured current falls below this threshold level the unit will action after the time delay. Trip Time. The trip time is set to determine how long an undercurrent condition can persist before the configured action is taken.

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=22

22

05.1

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log..32p

IC

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ect


Issue 4, July 2010

U/C Reset Delay. When an undercurrent condition occurs the unit can be prevented from resetting until the U/C Reset Delay timer has expired. In some applications, typically well pumps the motor is cooled by the pumped fluid so the motor may be “hot” on tripping. This delay allows for a cooling period before an attempt at restart.

6.5.5. Overcurrent / Stall.

The MPR3E5 may be configured to trip, alarm and/or indicate as a result of an overcurrent condition, typically caused by a phase or earth fault, mechanical jam or other heavily loaded motor condition. Overcurrent protection is usually used to ensure faults are cleared more quickly than that provided by the Thermal overload protection. Overcurrent protection is disabled during STARTING. Trip Level. The overcurrent pickup is set as a percentage of the Full Load Current (FLC). If the current rises and remains above the threshold level action is taken after the trip time has elapsed. Trip Time. The trip time is set to determine how long an overcurrent condition can persist before the configured action is taken.

6.5.6. Negative Phase Sequence.

The MPR3E5 may be configured to trip, alarm and/or indicate as a result of a negative phase sequence condition. Trip Level. The overcurrent pickup is set as a percentage of the Full Load Current (FLC). If the current rises and remains above the threshold level action is taken after the trip time has elapsed. Trip Time. The trip time is set to determine how long an overcurrent condition can persist before the configured action is taken.

6.5.7. Earth Fault.

The MPR3E5 may be configured to trip, alarm and/or indicate as a result of an EF overcurrent condition. Earth Fault measurement can be achieved by either, using a core balance transformer (CBCT) or by using a residual connection from the three phase CT’s Generally it is desired that earth fault protection be instantaneous although in some applications transient earth fault currents may be seen, and requires a small delay to be imposed to prevent nuisance tripping. In most cases the earth fault protection feature should be set to ensure appropriate coordination with other devices. Depending on the type of system grounding (resistive or solidly earthed) an earth fault current has the potential to be very large. The user must be aware of the maximum earth fault current the system can experience when using the Earth Fault protection feature with a fused contactor. If solidly earthed, the earth fault current may be much higher than the rated current breaking capability of the contactor. An attempt to break a fault current in excess of its rating may cause damage to the equipment. In such applications the user should ensure appropriate coordination between the device and HRC fuses and/or disable the Short Circuit protection feature. Circuit Breakers are typically rated to break the full fault current, Contactors are not.


Issue 4, July 2010

Trip Level. The earth fault pickup is set as a percentage of the EF CT Primary. If the current rises and remains above the threshold level action is taken after the trip time has elapsed.

With a residual connection the EF CT Primary should be set to the same value as the CT Primary. With a CBCT connection the EF CT Primary should be set to the primary rating of the CT. Trip Time.

The trip time is set to determine how long an earth fault condition can persist before the configured action is taken.

6.5.8. Load Increase. (Low Set Overcurrent)

The MPR3E5 may be configured to trip or alarm as a result of a load increase condition, often used to indicate process conditions such as stock on a conveyor belt. Load Increase protection is disabled during STARTING. Trip Level. The load increase pickup is set as a percentage of the Actual Running Current (ARC). Depending on the application a load increase may be a frequent occurrence and care must be taken to prevent nuisance tripping. Trip Time. The trip time is set to determine how long an increased load condition can persist before the configured action is taken.

6.5.9. Single Phase.

The MPR3E5 may be configured to trip, alarm and/or indicate as a result of a single phasing condition, i.e. loss of one current phase, and will operate in 100ms. The function operates at 100% unbalance. If this function is disabled the unbalance protection will not operate at the 100% condition. For single phase to operate the remaining phases should be reading above 60% of the FLC setting.

6.5.10. Unbalance Current.

Unbalance of a three-phase motor can cause the windings to overheat as the motor continues to rotate and develop the required torque to meet the demand. Unbalance is determined thorough measured current. The amount of unbalance is calculated using one of the equations detailed below: i) If the Highest_Phase_I > 80% motor full load current (FLC):

100__

)____(% ×

−=

IPhaseHighest

IPhaseLowestIPhaseHighestUnbalance

ii) If the Highest_Phase_I < 80% of FLC:

100___

)____(% ×

−=

currentloadFullMotor

IPhaseLowestIPhaseHighestUnbalance


Issue 4, July 2010

Trip Level. If the unbalance increases and remains above the set level action is taken after the trip time has elapsed. Trip Time. The trip time is set to determine how long an unbalance condition can persist before the configured action is taken.

6.5.11. Short Circuit

The MPR3E5 may be configured to trip as a result of a short circuit condition. This feature is typically enabled when the motor is being controlled by a circuit breaker rather than a fused contactor arrangement. It provides a fixed instantaneous trip (<100ms) at a fixed phase current setting of 10x In (where In is the phase current transformer primary setting). When this setting is disabled a trip inhibit is active for currents over 8-12xIn. This is configurable in the protection settings menu. Above the trip inhibit threshold only the Thermal Model is active and the relay will trip according to the Overload Curve irrespective of other settings. This prevents a contactor from being damaged by attempting to break a fault current in excess of its rating. The intention is to allow the HRC fuse or other fault current rated device to clear the fault.

6.5.12. Contactor Fault.

Contactor Fault protection is determined from the measured current meaning if a trip signal is issued and the MPR3E5 can still detect current it can determine that the contactor (or breaker) has failed to open. In which case, it will respond with a secondary trip or alarm, dependant upon the configured action. Trip Time. Determines the allowable time for phase current to be measured before any action is taken. Trip Inhibit Level. Determines the allowable level above which the contactor fault function will be inhibited from issuing a trip output.

6.5.13. Serial Timeout.

For a set period of inactivity on the rear communication port the unit can be configured to take some action in the event. It is worth noting that the MPR3E5 device is slave to any host system, the unit will not send information via the serial port unless it has been requested by a master device.

6.5.14. Internal Error.

The MPR3E5 incorporates an internal software and hardware watchdog feature to monitor the integrity of both on board hardware and software systems. This feature may be configured to indicate as a result of any registered problems. If a problem with the hardware or software is located during the error check routines the MPR3E5 will generate an error code (or diagnostic status).


Issue 4, July 2010

6.5.15. Phase Rotation.

The direction of rotation of a motor is determined by the connection of the 3 phase supply. In some applications it may be necessary to prevent the motor accelerating in the opposite direction or with incorrect phase connections. The MPR3E5 may be configured to trip, alarm and/or indicate as a result of an incorrect phase rotation. Phase Rotation is only enabled during the STARTING sequence. Direction. The configurable phase rotation can be ‘ABC’ (0

0 120

0 240

0) or ‘ACB’ (0

0 240

0 120

0) this determines the preference.

If the phase relationship is anything other than this the configured action is taken.

6.5.16. Serial Inhibit.

Serial Inhibit can be used as an effective lockout function. A command is issued by the DCS or over the serial link to inhibit the starting of the drive. The relay will display an active inhibit until such time that a reset command clears the standing inhibit. It is not possible to clear the inhibit by any other means.


Issue 4, July 2010

6.6. MPR3E5 Motor Starting.

As the MPR3E5 is not in direct control of the motor starter, meaning the relay does not make the decision to first close the contactor or breaker it thus behaves purely as a protective motor overload device. i.e. The MPR3E5 does not issue the close signal to starter but will, in cases of overload or other active protective functions, issue a trip signal to open the main contactor or breaker The MPR3E5 will determine if the drive is in a running status and indicate via the LED colour, this is determined solely by the measured current in the circuit. As the measured current is the only ‘control’ signal that the MPR3E5 receives then, if the level of current falls below 10% of FLC then the MPR3E5 will assume the drive has stopped. Care must be taken with systems which may have large changes in load or unload or indeed soft start drives where the inrush current is controlled.


Issue 4, July 2010

6.7. I/O Settings (Input / Output Settings).

The I / O settings are where the 2 digital inputs and 4 relay outputs are each assigned to a function. Relay outputs can be assigned to the same function where as the digital inputs cannot. If a digital input has previously been assigned it is removed from the list to prevent it being duplicated elsewhere.

6.7.1 Digital Inputs

The MPR3E5 provide 2 digital inputs which can be configured to one of the functions described below. Otherwise the digital input defaults are Not Used.

Reset Fault.

This input enables the operator to reset MPR3E5 Fault or Alarm conditions. The Input can only perform a reset if the following conditions are met: 1. The Protection Settings for the specific fault or alarm are set to allow remote resets. 2. The condition that caused the Fault or Alarm to occur no longer exists.

Block Input.

The Block Input can be used to block assigned protection functions, upon energising of the Digital Input. Each protection function has an option to enable the ‘BLOCK’ functionality. The block option must be configured in each of the protection functions where blocking of the function may be desired in for the blocking input to work. If a function is configured to be blocked AND the digital input assigned as block is energised, then that function is prevented from taking its normal programmed action.

Speed Switch.

Closing of this input reduces the trip time on the cold and hot curves by 50%. A tachometer is generally used on the rotor to determine if the shaft is turning and the transducers output is fed to this input (open for rotation, closed for low speed or standstill). This provides a faster trip for stalled motors.

6.7.2 Relay Outputs

The MPR3E5 provide 4 changeover contact relay outputs which can be configured to one of the functions described below. Otherwise the programmable relay output defaults are Not Used.

Trip.

If an output relay is assigned as ‘Trip’ then this relay will change from the de-energised to the energised state when triggered by any protection function that is configured to trip the relay.

Trip Fail Safe.

If an output relay is assigned as ‘Trip FS’ (Trip Failsafe) then this relay will change from the energised to the de-energised state when triggered by any protection function that is configured to trip the relay.

I / O SettingsY Top

Digital 1Y NReset Fault


Issue 4, July 2010

Alarm.

If an output relay is assigned as ‘Alarm’ then this relay will change state from de-energised to the energised relay contact when triggered by any protection function that is configured to alarm.

Alarm Fail Safe.

If an output relay is assigned as ‘Alarm FS’ then this relay will change state from energised to the de-energised relay contact when triggered by any protection function that is configured to alarm.

Inhibit.

If an output relay is assigned as ‘Inhibit’ then this relay will change state from de-energised to the energised relay contact when the MPR3E5 registers an inhibit condition.

Inhibit Fail Safe.

If an output relay is assigned as ‘Inhibit then this relay will change state from energised to the de-energised relay contact when the MPR3E5 registers an inhibit condition.

Healthy.

If an output relay is assigned as ‘Healthy’ this relay will be in its de-energised state at all times while the unit reports the motor as being healthy. This relay will be energised when the unit registers either an Alarm or Fault condition or the motor has been inhibited from starting.

Healthy Fail Safe.

If an output relay is assigned as ‘Healthy FS’ this relay will be in its energised state at all times while the unit reports the motor as being healthy. This relay will be de-energised when the unit registers either an Alarm or Fault condition or the motor has been inhibited from starting.

Aux Trip

If an output relay is assigned as ‘Aux Trip’ (Auxiliary Trip) then this relay will be energised when any of the measured phase currents are above the contactor inhibit level setting.

Internal Fail.

If an output relay is assigned as ‘Intrnl Fail’ this relay will energise if a hardware or software fault is detected by the MPR3E5s internal diagnostic functions or watchdog circuits.


Issue 4, July 2010

6.8. System Settings.

This screen allows access to relay specific settings. Such as, password functionality, screen contrast settings etc and non categorised relay settings. These settings and their functions are explained in detail below

Password. If the password is set to enabled the default password (6363) may be used to change setting and reset statistical data. If the password has been changed then the new password must be used. Change Password. The MPR3E5 default password is '6363'. It is recommended for security purposes this password be changed. The password may be up to 6 characters long and alphanumeric if desired. If the User Password is lost and the Engineers Password has been disabled the only options to retrieve the password are to either read the information via the serial link or execute a Configuration Reset on the relay to restore all of the factory defaults. Contrast and LCD Backlight. These functions allow the user to change the display contrast and backlight levels. Reset Thermal Capacity. The absorbed TC can be forced to zero in order to complete thermal tests or for emergency starting. (Password Protected) Set Default Page / Default Return Time. Any of the display scroll data pages can be nominated as the default page and returned to after a set period of key press inactivity. To set the page; select the required page in the main display scroll menu then enter the system settings menu and select ‘set default page’. Time Sync Delay. The MPR3E5 can be time synchronised by either, Chronovision which is a GPS based device which sits on the RS485 network and synchronises the time and date of each connected unit, or via broadcast command on the daisy chained RS485 modbus network. This delay prevents immediate updating of the Relay real time clock (RTC). Software Version. Displays the operating firmware loaded on to the unit. This should be noted along with the serial number when corresponding about this equipment Serial Number. Displays the Serial number of the Relay. Smart Card Activation Key In order for the smart card to operate a unique activation code is required to access hidden menu screens.

System SettingsY Top

PasswordY NENABLED


Issue 4, July 2010

Time and Date. These functions allow the user to set the date and the time on the relay. Chronovision When enabled allows the real time clock to be updated via the broadcast GPS sync signal from Chronovision. Screen Saver and Screen Saver Time To help extend the life of the LCD we can power the display down if the application suits. The screen will power down after the set time from the last key press. The MPR3E5 will still operate and can be remotely controlled via digital inputs or the serial interface. On any key press or active fault the display will relight.


Issue 4, July 2010

6.9. Trip History.

This screen allows access to the relays Trip History data. Upto 32 Trip events can be registered in this menu screen, starting with the most recent to last available (32

nd most recent trip).

Each event record contains the Trip Cause, the Trip Time and Trip Date.

The up and down pushbuttons allow each trip record to be scrolled through. In the left hand corner of the LCD a letter ‘R’ is shown, this allows the reset (deleting) of individual trip events. To reset a particular event scroll through the available trip records until the event you require is reached, then press the left hand pushbutton under the letter ‘R’ shown on the LCD. The trip event will now be reset. Only press this once otherwise multiple events could be accidentally reset with continual pressing, each trip record will take a few seconds to delete and update on the LCD.

6.10. Alarm History.

This screen allows access to the relays Alarm History data. Upto 32 Alarm events can be registered in this menu screen, starting with the most recent to last available (32

nd most recent alarm).

Each event record contains the Alarm Cause, the Alarm Time and Alarm Date.

The up and down pushbuttons allow each trip record to be scrolled through. In the left hand corner of the LCD a letter ‘R’ is shown, this allows the reset (deleting) of individual alarm events. To reset a particular event scroll through the available alarm records until the event you require is reached, then press the left hand pushbutton under the letter ‘R’ shown on the LCD. The alarm event will now be reset. Only press this once otherwise multiple events could be accidentally reset with continual pressing, each alarm record will take a few seconds to delete and update on the LCD.

6.11. Last Fault.

This screen allows access to the relays last fault data information. This will be the most recent trip and alarm events. Information given in this screen is more detailed than that of the Alarm and Trip History pages. To scroll through the available data use the up and down pushbuttons on the frontplate of the relay. The information provided for both last trip and last alarm is as follows:

Trip Cause Alarm Cause Trip Time Alarm Time Trip Date Alarm Date Trip I1 Value Alarm I1 Value Trip I2 Value Alarm I2 Value Trip I3 Value Alarm I3 Value Trip In Value Alarm In Value Trip Io Value Alarm Io Value Trip TC Value Alarm TC Value

Trip HistoryY Top

Trip Cause :1R No Data

Alarm HistoryY Top

Alarm Cause :1R No Data

Last Fault

Y TopLast Trip Cause

NNo Data


Issue 4, July 2010

6.12. Stats Info.

If the Password is set to enabled, the password will be requested here to allow access to this menu.

This screen allows access to relays statistical information. To scroll through the available data use the up and down pushbuttons on the frontplate of the relay. In the left hand corner of the LCD a letter ‘R’ is shown, this allows the reset (deleting) of individual statistical values.

Statistical information available in this menu is as follows:

No. of Starts Number of Starts (total) Run @this Start Number of hours run during this start Total Run Time Total number of hours run (during all starts) No. of Trips Number of Trips (total) Acc Trp Current 1 Accumulated Trip Current for I1 (can be used as breaker wear indic.) Acc Trp Current 2 Accumulated Trip Current for I2 (can be used as breaker wear indic.) Acc Trp Current 3 Accumulated Trip Current for I3 (can be used as breaker wear indic.) Start Peak I Last Starting Peak Current Strt Time Length Last Start Time in seconds

6.13. Calibration Menu.

The calibration menu should not be entered unless it is absolutely necessary to do so. Any inadvertent settings made here may compromise the accuracy of the unit and its ability to trip.

If the Password is set to enabled, the password will be requested here to allow access to this menu.

The gain and offset values for each of the analogue channels can be adjusted. Auto calibration routines can also be performed. Each unit is calibrated prior to dispatch and a signed test report is issued. The user may however access these settings if required and re-calibrate the device if deemed necessary.

In addition to the calibration of analogue inputs the Calibration Sub Menu provides some useful diagnostic tools. After entering the password the Calibration Sub Menu will be displayed and allows access to the following settings: Gain and Offsets for each analogue channel. Typically a gain value is between 900 to 1200 Auto I Cal With injected In phase current channels can be calibrated Auto In Cal With injected 3phase current In can be calibrated Auto Io Cal With injected Io earth current channel can be calibrated Reset Cal Factors Reset the calibration to default, gain=1024 Run Offset Cal Without any injected input, this sets all channels to 0. Digital Inputs Check of the binary digital input status O/P Relay Tests Output relays can be forced to changed state Noise Check View the noise level readings per channel Soak Setup Sets the relay into a heat treatment mode Test Mode Sets the relay into a test mode System Frequency Corresponds the relay to the frequency of the measured system.

Stats Info

Y TopNo. of Starts

NR 0

Calibration MenuY Top

Password=AAAAASave Next


Issue 4, July 2010

6.14. Smart Card Settings (OPTIONAL).

The Smart Card is a removable eeprom memory card which can be supplied with the MPR3E5 on request. An activation code is required to access this menu system in order to allow full manipulation of the card. The activation code is programmed in the System Settings, Enable Smart Card option.

The Smart Card can be used for parameter storage and for cloning like drives or it can be formatted as an extended data card which will log and store events.

Smart Card MenuY Top

Card TypeY NSetting


Issue 4, July 2010

7. Menu Tree Structure

I1, I2, I3, Average Current, NPS Current, Earth Current, Motor Load, Thermal Capacity, DI1, DI2 Trip Status, Alarm

Status, Inhibit Status, Motor Status, Test Mode

Maximum Start Time Thermal Model

Too Many Starts Under Current Over Current

Negative Phase Seq. Earth Fault

Load Increase Single Phase

Unbalance Short Circuit

Contactor Fault Phase Rotation Serial Timeout Internal Error

2x Digital Inputs:

Not Used Reset Faults Speed Switch

Block Input

4x Output Relays:

Trip / Trip FS Alarm / Alarm FS Inhibit / Inhibit FS

Healthy/ Healthy FSAux. Trip

Internal Fail

SERIAL SETTINGS

MOTOR SETTINGS

CT Primary FLC ARC

EF CT Primary

Serial Enable Drive Number

RS485 Baud Rate RS485 Protocol

RS485 Parity RS232 Baud Rate RS232 Protocol

RS232 Parity Serial Delay Fast Scan 1 Fast Scan 2 Fast Scan 3

Max Scan Time

Card Inserted Card Type:

Data or Settings Device Type Card Options Transfer T&D

Transfer to Card or Device

Lock Auto Lock

Format Card

PROTECT SETTINGS

DISPLAY SCROLL

INITIAL MENU

MENU

CALIBRATION MENU

I/O SETTINGS

SYSTEM SETTINGS

SMART CARD MENU

OPTIONAL

Password Engineer Password Change Password

Contrast LCD Backlight

Reset TC Set Default Page

Default Return Time Time Sync. Delay

Software Ver. Serial No.

Enable Smartcard Time & Date Chronovision Screen Saver

Gain and Offsets Auto I Cal

Auto In Cal Auto EF Cal

Reset Calibration Offset Calibration

Digital Inputs O/P Relay Tests

Noise Check Soak Setup Test Mode

System Frequency

TRIP & ALARM HISTORY

Trip/Alarm Cause Trip/Alarm Time Trip/Alarm Date

Upto 32 events

can be stored in each trip menu

and alarm menu page

Trip/Alarm Cause Trip/Alarm Time Trip/Alarm Date

Trip/Alarm I1 Trip/Alarm I2 Trip/Alarm I3 Trip/Alarm In Trip/Alarm Io Trip/Alarm TC

LAST FAULT

No. of Starts Run Hrs @ this Start Total Run Time Hrs

No. of Trips Acc. Current I1 Acc. Current I2 Acc. Current I3

STATS. INFO.


Issue 4, July 2010

8.1. MPR3E5 System Settings Summary.

Range Step Default User Setting Serial Settings

Serial Enabled / Disabled Enabled Drive Number 1-32 1 1 RS485 Baud Rate 9600/19200/38400 9600 RS485 Serial Protocol Modbus / P&B / P&B Inv P&B RS485 Parity Even / Odd / None Even RS232 Baud Rate 4800/9600 4800 RS232 Serial Protocol Modbus / P&B / P&B Inv P&B RS232 Parity Even / Odd / None Even Serial Delay 1ms-20ms 1ms 1ms Fastscan 1 0-255 2 0 Fastscan 2 0-255 2 0 Fastscan 3 0-255 2 0 Max Scan Time 1-30s 1s 1s Motor Settings

CT Primary 1-1000A 1A 100A FLC 25-200% of CT Primary 0.01A / 0.1A / 1A 50.0A ARC 50-100% FLC 0.01A / 0.1A / 1A 50.0A EF CT Primary 0.1-1000A 0.1A 100A

System Settings

Password Enabled / Disabled Disabled Engineering Password Enabled / Disabled Enabled Change Password 5 Characters 6363 LCD Contrast LCD Backlight Default Return Time No Return (Off) 1-5min 1min 1min Time Sync Delay 0-2000ms 1ms 0ms Software Version X.XXX Serial Number XXXXXX Enable Smart Card XXXXXX Time XX:XX:XX Date XX/XX/XX Chronovision Enabled / Disabled Disabled LCD Scrn Saver Enabled / Disabled Disabled LCD Scrn Saver Time 60-3600s 1s 3600s


Issue 4, July 2010

8.2. MPR3E5 Control Setting Summary.

Range Step Default User Setting Digital Inputs

Dig_In 1 Not Used / Speed Switch / Reset / Block

Not Used

Dig_In 2 Not Used / Speed Switch / Reset / Block

Not Used

Relay Outputs

Relay 1 Trip / Trip FS Trip Relay 2 Programmable Not Used Relay 3 Programmable Not Used Relay 4 Programmable Not Used


Issue 4, July 2010

8.3. MPR3E5 Protection Setting Summary.

# Selectable

! Fixed

Tri

p

Ala

rm

Inh

ibit

Blo

ck

Au

to

Pan

el

Seri

al

Rem

ote

ANSI No.

Protective Function Available

Action Available

Reset Variable Range Step

48/14 Maximum Start Time # # # # # # # Trip Time 1-250s 1s

26/49 Thermal Model ! # # # # #

Hot/Cold Ratio Cool Time Factor t6x

20-80% 25-2000% 1-120s

1% 5% 1s

37 Undercurrent # # # # # # #

Trip Level (% of ARC) Trip Time U/C Reset Delay

30-90% 1-60s 0-1200s

5% 1s

10s

51 Load Increase # # # # # # # Trip Level (% of ARC) Trip Time

105-150% 1-60s

5% 1s

50/51 Overcurrent # # # # # # # Trip Level (% of FLC) Trip Time

150-750% 0.1-10.0s

5% 0.1s

46SP Single Phase # # # # # # # Trip Time =<100ms

46 Unbalance # # # # # # # Trip Level (% of FLC) Trip Time

10-40% 1-60s

5% 1s

50n/51n Earth Fault # # # # # # # Trip Level Trip Time

4-40% 0.5-5.0s

1% 0.01s

66 Too Many Starts ! ! Starts Per Hour Start Inhibit Time

1-30 1-120m

1 1m

50 Short Circuit # # # # # # Trip Level[fixed] Trip Time [fixed]

10x In =<100ms

Contactor Inhibit Level Trip Level 8-12 In 1

Serial Timeout # # # # # # # Timeout In 5-120 1s

Internal Error # # # # # # #

46 Negative Phase Sequence # # # # # # # Trip Level (% of FLC) Trip Time

4-200% 0.1-10s

1% 0.1s

46 Phase Rotation # # # # # # # Trip Direction Trip Time [fixed]

ACB or ABC 10 cycles

48 Contactor Fault # # # # # # # Trip Time 0.1-2.0s 0.1s


Issue 4, July 2010

8.4. MPR3E5 Blank Protection Setting Summary.

# Selectable

! Fixed

Tri

p

Ala

rm

Inh

ibit

Blo

ck

Au

to

Pan

el

Seri

al

Rem

ote

ANSI No.

Protective Function Available

Action Available

Reset Variable User Setting

48/14 Maximum Start Time Trip Time

26/49 Thermal Model !

Hot/Cold Ratio Cool Time Factor t6x

37 Undercurrent

Trip Level (% of ARC) Trip Time U/C Reset Delay

51 Load Increase Trip Level (% of ARC) Trip Time

50/51 Overcurrent Trip Level (% of FLC) Trip Time

46SP Single Phase Trip Time =<100ms

46 Unbalance Trip Level (% of FLC) Trip Time

50n/51n Earth Fault Trip Level Trip Time

66 Too Many Starts ! ! Starts Per Hour Start Inhibit Time

50 Short Circuit Trip Level[fixed] Trip Time [fixed]

=<100ms

Contactor Inhibit Level Trip Level

Serial Timeout Timeout In

Internal Error

46 Negative Phase Sequence Trip Level (% of FLC) Trip Time

46 Phase Rotation Trip Direction Trip Time [fixed]

10 cycles

48 Contactor Fault Trip Time


Issue 4, July 2010

Appendix 1

MPR3E5 Installation.

The MPR3E5 is supplied in a withdrawable case suitable for flush mounting as detailed below. The control and CT cable should be stranded copper core of 0.5 to 2.5mm

2.

The rear terminal block accepts both pre-insulated screw and push on blade type connectors. Each terminal having 1x M4 screw type and 2x 4.8mm blade type complying BS5057. Wiring torque of M4 screw should not exceed : 0.5 – 0.6 Nm The MPR3E5 has been designed for installation on to open type panels, for use on the flat surface of a type 1 enclosure and for installations where the ambient temperature does not exceed 60

0 C.

17

8m

m D

OO

R S

WIN

G

215.00 mm

FITTED with 12mm M4 STUDS

34.00 mm

AN

Y F

ITT

ED

PU

SH

BU

TT

ON

S P

RO

JE

CT

LE

SS

TH

AN

10

mm

MIN 25mmFOR CABLECLEARANCE

45

.00

mm

16

8.0

0 m

m

15

8.0

0 m

m

ø 4.30 mm

17

8.0

0 m

m

52.00 mm

98.00 mm

102.00 mm

23.00 mm75.00 mm


Issue 4, July 2010

Appendix 2

Termination Numbers.

1

3

5

7

9

11

13

15

17

19

21

23

25

27

2

4

6

8

10

12

14

16

18

20

22

24

26

28

+ ve - ve

Relay 1 NO

Relay 3 NC

Relay 2 NO

Relay 4 NO

485 +

Relay 1 NC

Relay 1 C

Digital Input 2

Relay 4 C

485 -

Relay 2 NC

Relay 2 C

Relay 3 C

Relay 3 NO

I2 (S2)

I3 (S2)

Io (S2)

I2 (S1)

I3 (S1)

485 Gnd

Relay 4 NC

Digital Input 1

I1 (S1)

Io (S1)

I1 (S2)

EARTH


Issue 4, July 2010

Appendix 3

MPR3E5 Schematic Diagrams.

Conventional Protection Class Ring-Type Current Transformers of 1A or 5A Secondary rating are common and can be connected directly to the CT inputs of MPR3E5. Two CT’s can be used for phase current measurement with the third phase residually connected through the remaining CT input. Or normally three CT’s can be used connected directly to each phase input of MPR3E5, the summation can be connected via the earth CT input to provide earth fault protection, or the earth fault is via a CBCT. In the residual earth connection it may be a requirement to addition a stabilising resistor in the earth return leg, this is generally only required when EF protection is set at a low threshold and fast operating time. The spill current (errors in the CT matching) during the initial energising can cause the drives to trip due to earth fault.


Issue 4, July 2010

Appendix 4

Thermal Overload Curve.

Within the Thermal protection settings, the MPR3E5 can be programmed to respond with a definite time (DT) above levels of current in excess of the configured break out point. This can be used to help improve co-ordination with upstream or fused equipment.

These DT break out points can be set to 6x FLC, 8x FLC, 10x FLC or 12x FLC, the default being at 6x FLC. The graph alongside shows the cold Thermal Overload response when t6x is set to 1 second. Note the ‘t6x hinge point’ ( ) at FLC=6, t=1, when the value t6x is adjusted it is this point on the curve which the new value would pass through. The DT break points are also shown (where the response behaves as definite time for values of measured current above the set threshold).

DT response exceeding: 6x FLC




Multiples of FLC

Tri

p t

ime in

seco

nd

s


Issue 4, July 2010

Appendix 5

Thermal Overload Trip Times.

The table below shows the trip times for Thermal Overload when t6x is set to 1 second.

Multiples Of FLC

Trip Time Cold Condition

Trip Time When H/C=80%



1.1 77.468313 71.686872 60.408772 42.837322

1.2 46.426652 41.641637 32.778060 20.476885 1.3 33.811442 29.780965 22.586635 13.291047

1.4 26.453714 23.009533 17.029457 9.668931

1.5 21.547026 18.568132 13.504964 7.487293

1.6 18.025108 15.422047 11.071467 6.034917

1.7 15.374032 13.079142 9.295212 5.003074

1.8 13.309965 11.271059 7.946272 4.235556 1.9 11.661489 9.837634 6.890768 3.644744

2 10.318274 8.676889 6.045270 3.177680

2.1 9.205826 7.720641 5.355032 2.800485

2.2 8.271929 6.921518 4.782637 2.490488

2.3 7.478859 6.245566 4.301648 2.231962

2.4 6.798677 5.667817 3.892871 2.013661 2.5 6.210250 5.169508 3.542038 1.827342

2.6 5.697305 4.736272 3.238339 1.666828

2.7 5.247117 4.356935 2.973434 1.527405

2.8 4.849597 4.022677 2.740797 1.405415

2.9 4.496648 3.726455 2.535250 1.297983 3 4.181706 3.462575 2.352637 1.202813

3.1 3.899395 3.226394 2.189587 1.118058

3.2 3.645273 3.014089 2.043337 1.042213

3.3 3.415644 2.822485 1.911608 0.974041

3.4 3.207406 2.648928 1.792498 0.912516

3.5 3.017942 2.491181 1.684415 0.856783 3.6 2.845028 2.347350 1.586014 0.806122

3.7 2.686764 2.215821 1.496151 0.759922

3.8 2.541521 2.095209 1.413849 0.717665

3.9 2.407889 1.984322 1.338271 0.678907 4 2.284650 1.882129 1.268692 0.643264

4.1 2.170741 1.787732 1.204484 0.610407 4.2 2.065233 1.700348 1.145100 0.580047

4.3 1.967312 1.619293 1.090064 0.551934

4.4 1.876260 1.543962 1.038954 0.525849

4.5 1.791444 1.473824 0.991403 0.501597

4.6 1.712303 1.408407 0.947082 0.479009

4.7 1.638336 1.347292 0.905703 0.457935 4.8 1.569099 1.290108 0.867008 0.438239

4.9 1.504193 1.236521 0.830768 0.419803 5 1.443263 1.186234 0.796777 0.402521

5.1 1.385988 1.138978 0.764850 0.386297

5.2 1.332079 1.094512 0.734823 0.371045

5.3 1.281275 1.052621 0.706547 0.356689 5.4 1.233342 1.013107 0.679886 0.343159

5.5 1.188065 0.975792 0.654720 0.330392

5.6 1.145251 0.940516 0.630936 0.318332

5.7 1.104724 0.907132 0.608436 0.306926

5.8 1.066322 0.875505 0.587128 0.296128 5.9 1.029899 0.845513 0.566928 0.285896

6 0.995320 0.817046 0.547760 0.276188

If set to 6x FLC the curve become definite time for multiples of FLC greater than 6. I.E.

7 0.995320 0.817046 0.547760 0.276188 8 0.995320 0.817046 0.547760 0.276188


Issue 4, July 2010

Otherwise the curve will continue with the following trip times:

Multiples Of FLC





6 0.995320 0.817046 0.547760 0.276188

6.1 0.962462 0.790001 0.529555 0.266972 6.2 0.931213 0.764285 0.512249 0.258212

6.3 0.901468 0.739811 0.495783 0.249880

6.4 0.873132 0.716500 0.480104 0.241948

6.5 0.846118 0.694279 0.465161 0.234391

6.6 0.820343 0.673081 0.450909 0.227184

6.7 0.795733 0.652844 0.437307 0.220308 6.8 0.772219 0.633510 0.424314 0.213740

6.9 0.749735 0.615027 0.411894 0.207464 7 0.728224 0.597344 0.400016 0.201463

7.1 0.707628 0.580416 0.388646 0.195719

7.2 0.687897 0.564201 0.377757 0.190219

7.3 0.668982 0.548659 0.367321 0.184950 7.4 0.650840 0.533752 0.357314 0.179897

7.5 0.633428 0.519448 0.347712 0.175050

7.6 0.616708 0.505712 0.338494 0.170397

7.7 0.600643 0.492517 0.329639 0.165928

7.8 0.585200 0.479833 0.321129 0.161633

7.9 0.570347 0.467634 0.312945 0.157504 8 0.556053 0.455897 0.305072 0.153532


9 0.556053 0.455897 0.305072 0.153532 10 0.556053 0.455897 0.305072 0.153532


Multiples Of FLC





8 0.556053 0.455897 0.305072 0.153532

8.1 0.542292 0.444597 0.297493 0.149709

8.2 0.529037 0.433714 0.290194 0.146028

8.3 0.516263 0.423226 0.283162 0.142482

8.4 0.503947 0.413116 0.276383 0.139063

8.5 0.492068 0.403364 0.269845 0.135767 8.6 0.480606 0.393955 0.263538 0.132587

8.7 0.469540 0.384872 0.257450 0.129518

8.8 0.458853 0.376101 0.251571 0.126555

8.9 0.448527 0.367627 0.245892 0.123692 9 0.438547 0.359437 0.240404 0.120926

9.1 0.428897 0.351518 0.235098 0.118253 9.2 0.419563 0.343859 0.229966 0.115667

9.3 0.410531 0.336448 0.225001 0.113165

9.4 0.401788 0.329275 0.220196 0.110744

9.5 0.393321 0.322329 0.215543 0.108400

9.6 0.385121 0.315601 0.211037 0.106130 9.7 0.377174 0.309082 0.206671 0.103931

9.8 0.369472 0.302763 0.202439 0.101800

9.9 0.362003 0.296637 0.198337 0.099733 10 0.354759 0.290695 0.194358 0.097730


11 0.354759 0.290695 0.194358 0.097730

12 0.354759 0.290695 0.194358 0.097730


Issue 4, July 2010


Multiples Of FLC





10 0.354759 0.290695 0.194358 0.097730

10.1 0.347731 0.284930 0.190498 0.095786

10.2 0.340910 0.279336 0.186752 0.093900 10.3 0.334288 0.273905 0.183116 0.092069

10.4 0.327857 0.268631 0.179585 0.090291

10.5 0.327857 0.268631 0.179585 0.090291

10.6 0.315541 0.258531 0.172824 0.086887

10.7 0.309642 0.253694 0.169586 0.085257

10.8 0.303908 0.248991 0.166439 0.083673 10.9 0.298331 0.244418 0.163378 0.082132

11 0.292907 0.239970 0.160401 0.080634

11.1 0.287629 0.235643 0.157505 0.079176

11.2 0.282493 0.231432 0.154687 0.077758

11.3 0.277494 0.227333 0.151944 0.076378

11.4 0.272626 0.223342 0.149274 0.075034 11.5 0.267886 0.219456 0.146673 0.073725

11.6 0.263268 0.215670 0.144140 0.072450

11.7 0.258769 0.211982 0.141672 0.071209

11.8 0.254384 0.208387 0.139268 0.069998

11.9 0.250110 0.204883 0.136924 0.068819 12 0.245943 0.201467 0.134638 0.067669

The curve will respond as definite time for multiples of FLC thereafter.

13 0.245943 0.201467 0.134638 0.067669

14 0.245943 0.201467 0.134638 0.067669

For completeness the graph over shows the thermal overload curve with both the cold curve and the hot curve shown as a banded orange coloured area with limits of 80% and 20% (H/C ratio) and also the mid point of 50%.


Issue 4, July 2010

Tri

p t

ime

in

se

co

nd

s

Multiples of FLC

Cold Curve 80% H/C 50% H/C

20% H/C


Issue 4, July 2010

Appendix 7

Handling Guidelines.

Installation. Protection relaying equipment should be installed, commissioned and programmed by professional engineers familiar with such products. P&B cannot be held liable if proper handling is not observed. The relay is programmed to the factory default settings upon shipment and must be programmed correctly to achieve safe and satisfactory protection of the equipment. Changes to the relay hardware and or software may affect the calibration of the unit and its measurement accuracy should be checked prior to reinstating the product in service. If unsure, contact P&B for advice. Disposal. P&B are committed to manufacturing practices which do not result in pollution or cause damage to the environment. As the MPR3E5 contains a non rechargeable battery we would recommend safe disposal of equipment at the end of its life inline with local laws. If you wish us to dispose of equipment on your behalf we are able to provide such services. Caution, battery may explode if mistreated. Do not recharge, disassemble or dispose of in fire.

Due to product development and technology changes, all information contained within this publication is subject to

change without prior notice

Publication number MPR3E5 Issue 4 Dated July 2010

mpr3e5 technical manual issue 4, july 2010 - p&b · pdf filepage 3 mpr3e5 technical manual...

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