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SR750 & SR760 FEEDERSR750 & SR760 FEEDER

MANAGEMENT RELAYSMANAGEMENT RELAYS

Total Protection, Control, Metering &

Monitoring of Utility Distribution

Feeders

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Presentation OverviewPresentation Overview

� Requirements

�Meeting the Needs

� Cost Analysis

� Our Strengths

� Key Benefits

� Ordering

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Customer RequirementsCustomer Requirements

� Protection

� Control

�Monitoring

�Metering

� Communication

� Inputs & Outputs

� User Interface

� Reliability

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Meeting the Needs of ProtectionMeeting the Needs of Protection� Phase Timed Overcurrent (51P)

� Voltage Restraint

� (12 selectable curves plus 2 Flexcurves)

� Ground Timed Overcurrent (51N)

� Phase & Ground Loset Overcurrent (50PL, 50NL)

� Phase & Ground Hiset Overcurrent (50PH, 50NH)

� Phase & Ground Directional Control

� Zero Sequence (67P)

� Negative Sequence (67N)

� Negative Sequence Instantaneous (46/50) and Time (46/51)

Overcurrent

� Voltage Phase Reversal (47)

� Negative Sequence Overvoltage (59Q)

� Undervoltage & Overvoltage (27-1, 27-2, 59-1, 59-2)

� Underfrequency & Overfrequency (81U-1, 81U-2, 81O-1, 81O-2)

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Meeting the Needs of ControlMeeting the Needs of Control

� Full Remote/Local Control

� Manual Close Control

� 4 ShotAutoreclose (760)� TOC Curves Selection Between Reclosures

� Current Supervison

� Synchrocheck (Voltage, Phase Angle and Frequency)

� Cold Load Pickup

� Power Factor Control

� Load Shedding & Restoration Control

� 4 Settings Groups

� Transfer scheme

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Cold Load PickupCold Load Pickup

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CapacitorCapacitor

SwitchingSwitching

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Meeting the Needs of MonitoringMeeting the Needs of Monitoring

� Event Recorder (Last 128 Events)

� Trace Memory (10 x 16 Cycle Captures)

� Fault Locator

� Breaker Trip & Close Coil Detection

� Breaker Failure

� VT Failure

� Total Breaker Arcing

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WaveformWaveform

AnalysisAnalysis

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BreakerBreaker

ArcingArcing

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Meeting the Needs of MeteringMeeting the Needs of Metering

� Individual Voltages & Currents

� Real, Reactive & Apparent Power Demand

� Real & Reactive Power Costs & Usage

� Running & Maximum Demand Levels

� Frequency & Power Factor

� Synchronizing Voltage & Frequency

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Meeting the Needs of CommunicationsMeeting the Needs of Communications

� RS485/RS422 Serial Port (PLC, SCADA,

PC, DNP 3.0 etc.)

� Front Panel RS232 Program Port

� Fully programmable front keyboard with a

40 character display & status indicators

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Meeting the Needs of InputsMeeting the Needs of Inputs

� 1 analog input channel

� Universal Power Supply (ac/dc)

� 3 phase CTs & VTs

� Zero Sequence ground CT

� 14 selectable logic inputs (21 functions)

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Meeting the Needs of OutputsMeeting the Needs of Outputs

� 6 E/M aux relays, 10A Continuous & 30A

make/carry

� E/M trip, and close relays 20A Continuous

& 40A make/carry (0.2s)

� 1 solid state, 15A @ 250Vdc for 500ms

� 8 analog outputs

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Meeting the Needs of User InterfaceMeeting the Needs of User Interface

� Setup Software

� Flash Memory for Future or Utility

Upgrades or modifications

� Fully Programmable keyboard with 40

character display and status indicators

� Fast and easy to use

� Draw out construction

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Meeting the Needs of ReliabilityMeeting the Needs of Reliability

� Extensive IEC & ANSI Testing

� Complete Burn-in and testing on Relays

� Self Testing

� Draw out Case (no external hardware)

� Front Door with Gasket and Lock Provision

� Heavy Duty Terminals

� ISO 9002 Certified, UL, CSA, ACA

(Australian Standard) & UK Approvals

� Halt testing and CE

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Cost AnalysisCost Analysis

� Full Protection Package

� Full Metering Package complete with

Transducers

� Time Saving Fast and Easy User Setup

� Programmable inputs and outputs

� Fault Recording and Simulation Testing

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Our StrengthsOur Strengths

� Customer Input for Design & Application

� High Quality & Dependable Products

� Built in Flexibility including Flash Memory

� Continuous Upgrading & Windows Software

� Full Technical & Applications Service

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Key BenefitsKey Benefits

� Combines all elements into one, easy to use,

reliable, cost effective package:

Protection Control

Monitoring Metering

Communications User Interface

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OrderingOrdering

� Specify SR 750 or SR 760

� Specify phase current of 5 amp or 1 amp

� Specify ground current of 5 amp or 1 amp

� Specify sensitive ground current of 5A or 1A.

� LO Power Supply range is - DC: 20 to 60V

AC: 20 to 48 V @ 48 to 62 Hz

HI Power Supply range is - DC: 88 to 300 V

AC: 70 to 265 V @ 48 to 62Hz

� Specify Analog outputs: 0-1mA, 0-5mA, 0-10mA and 4-

20mA

� Specify Breaker Closed LED: Red or Green