SIL-B Feeder Protection Relay

SIL-B-SIL-B Feeder Protection Relay

Sipariş No : SIL-B

The SIL B is a Relay for Primary Distribution which is able to protect a feeder by means of current and voltage functions. It is normally used with a circuit breaker as cutting element. Monitors differences in voltage magnitudes, phase angles, and frequencies to perform synchronism checks across the circuit breaker. This function can be coordinated with the auto-reclose function (up to five recloses)

SIL-B Feeder Protection Relay

Protection Function ANSI     Protection Function ANSI
Three-phase overcurrent protection INST,DT or IDMT 50/51     Overvoltage protection 59P/59N
Directional three-phase overcurrent protection 67     Undervoltage protection 27P
Residual overcurrent protection 50/51N     Frequency protection 81U/O
Directional (sensitive) residual overcurrent protection 67N     Defined time directional overpower protection 32/40
Undercurrent monitor 37     Auto-reclose - 0 -> 1 (5 shots) 79
Latching 86     Syncrocheck / synchroswitch 25
Cold load pick-up block CLP     CT supervision- CTS 74TCS
Current unbalance 46     Programmable Logic  
Cable thermal overload protection - T > 49/49T     Breaker failure protection - CBFP 50BF/52
  • 6 configurable LEDs
  • Direct signalling/control of circuit breaker (52 function) and recloser (79 function)
  • 8 Inputs - 7 Outputs
  • 2 Oscillographic records, 20 fault reports and non-volatile RAM memory: stores 1000 events with date/time even without power supply thanks to its internal RTC
  • To allow the communication relays have a communication port on the front of the equipment.
  • Two rear ports on the back for remote communication. Two communication protocols can be used simultaneously:
  • - ModBus RTU and  IEC60870-5-103, IEC 61850, DNP 3.0 or IEC 60870-5-104




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