SR750 & SR760 FEEDER MANAGEMENT RELAYS
Total Protection, Control, Metering & Monitoring of Utility Distribution Feeders
Presentation Overview
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Requirements k Meeting the Needs k Cost Analysis
Our Strengths k Key Benefits k Ordering
Customer Requirements
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Protection k Control k Monitoring k Metering
Communication k Inputs & Outputs k User Interface k Reliability
Meeting the Needs of Protection
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Phase Timed Overcurrent (51P)
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Voltage Restraint
(12 selectable curves plus 2 Flexcurves)
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Ground Timed Overcurrent (51N) Phase & Ground Loset Overcurrent (50PL, 50NL) Phase & Ground Hiset Overcurrent (50PH, 50NH) Phase & Ground Directional Control
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Zero Sequence (67P) Negative Sequence (67N)
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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 Control
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Full Remote/Local Control Manual Close Control 4 ShotAutoreclose (760)
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TOC Curves Selection Between Reclosures Current Supervison
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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 Pickup
Capacitor Switching
Meeting the Needs of Monitoring
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Event Recorder (Last 128 Events) k Trace Memory (10 x 16 Cycle Captures) k Fault Locator k Breaker Trip & Close Coil Detection k Breaker Failure k VT Failure k Total Breaker Arcing
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Waveform Analysis
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Breaker Arcing
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Meeting the Needs of Metering
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Individual Voltages & Currents k Real, Reactive & Apparent Power Demand k Real & Reactive Power Costs & Usage k Running & Maximum Demand Levels k Frequency & Power Factor k Synchronizing Voltage & Frequency
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Meeting the Needs of Communications
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RS485/RS422 Serial Port (PLC, SCADA, PC, DNP 3.0 etc.) k Front Panel RS232 Program Port k Fully programmable front keyboard with a 40 character display & status indicators
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Meeting the Needs of Inputs
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1 analog input channel k Universal Power Supply (ac/dc) k 3 phase CTs & VTs k Zero Sequence ground CT k 14 selectable logic inputs (21 functions)
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Meeting the Needs of Outputs
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6 E/M aux relays, 10A Continuous & 30A make/carry k E/M trip, and close relays 20A Continuous & 40A make/carry (0.2s) k 1 solid state, 15A @ 250Vdc for 500ms k 8 analog outputs
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Meeting the Needs of User Interface
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Setup Software k Flash Memory for Future or Utility Upgrades or modifications k Fully Programmable keyboard with 40 character display and status indicators k Fast and easy to use k Draw out construction
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Meeting the Needs of Reliability
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Extensive IEC & ANSI Testing k Complete Burn-in and testing on Relays k Self Testing k Draw out Case (no external hardware) k Front Door with Gasket and Lock Provision k Heavy Duty Terminals k ISO 9002 Certified, UL, CSA, ACA (Australian Standard) & UK Approvals k Halt testing and CE
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Cost Analysis
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Full Protection Package k Full Metering Package complete with Transducers k Time Saving Fast and Easy User Setup k Programmable inputs and outputs k Fault Recording and Simulation Testing
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Our Strengths
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Customer Input for Design & Application k High Quality & Dependable Products k Built in Flexibility including Flash Memory k Continuous Upgrading & Windows Software k Full Technical & Applications Service
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Key Benefits
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Combines all elements into one, easy to use, reliable, cost effective package: Protection Control Monitoring Metering Communications User Interface
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Ordering
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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 420mA Specify Breaker Closed LED: Red or Green
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