750 Feeder Management Relay

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Key Benefits

The 750/760 Feeder Management Relay is a digital relay intended for the management and primary protection of distribution feeders. It can also be used for management and backup protection of busses, transformers, and power lines. The relay tracks the power system frequency and adjusts the sampling rate to maintain accuracy at all times.

  • Unique built-in control features | Comprehensive feeder protection plus automatic Transfer Scheme, Under Voltage and Under Frequency auto-restore
  • Best in class man machine interface (MMI) | Large backlit display with 40 characters to view relay information and settings in direct sunlight, full numerical keypad, and setpoint navigation keys
  • Accurate metering under sever system disturbances | Tracks power system frequency and adjusts sampling rate accordingly
  • Improve uptime of auxiliary equipment | Through I/O monitoring
  • Reduce troubleshooting time and maintenance costs | IRIGB time synchronization, event reports, waveform capture, data logger
  • Minimize replacement time | Draw-out construction
  • Simplify testing | Built in simulation features
  • Cost Effective Access information | Via Modbus RTU and DNP 3.0 Level 2 protocols, through standard RS232, RS485 & RS422 serial ports, and optional Modbus RTU over TCP/IP through embedded Ethernet Port to connect to 10MB Ethernet local or wide area networks
  • Complete asset monitoring | Analog I/O, Full metering including demand & energy
  • Follow technology evolution | Flash memory for product field upgrade
  • Long lasting life | When exposed to chemically corrosive and humid environments with optional conformal coating

 

 

750 Feeder Management Relay

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Features

Protection and Control
 

  • Complete time, instantaneous & directional phase, neutral, ground and negative sequence overcurrent
  • Time, instantaneous & directional sensitive ground overcurrent
  • Voltage restraint overcurrent
  • Bus phase and line auxiliary undervoltage
  • Bus phase overvoltage
  • Neutral overvoltage
  • Negative sequence voltage
  • Undervoltage automatic restoration
  • Bus underfrequency
  • Underfrequency automatic restoration
  • Automatic bus transfer
  • Breaker failure
  • Manual close control
  • Cold load pickup control
  • Power factor control
  • 4 shot recloser
  • 4 setting groups
  • Syncrocheck - V, f, Hz, & dead-source
  • 20 Programmable logic inputs
Monitoring and Metering
 

  • Fault locator, record of last 10
  • Breaker operation & trip failure
  • VT Failure
  • Power factor - two independent stages
  • Analog input - level and rate
  • Total breaker arcing current
  • Event recorder
  • Oscillography and Data Logger
  • Metering: V I Hz W var VA PF
  • Demand: Ia , Ib , Ic , MW, Mvar, MVA
User Interfaces and Programming
 

  • Front Panel LEDs, full key pad, and backlit LCD display
  • RS232, RS485 and RS422 ports - up to 19,200 bps
  • Ethernet port -10Mbs
  • Multiple protocols - ModBus™ RTU, ModBus™ RTU TCP/IP, DNP 3.0 Level 2
  • Includes EnerVista software