SIL-A Over Current & Earth Fault Relay

SIL-A-SIL-A Over Current & Earth Fault Relay

Sipariş No : SIL-A

The SIL-A is an overcurrent and earth fault protection relay for primary and secondary distribution with auxiliary power supply (110-230Vac/90-300Vdc, 24-48 Vdc or 24-110 Vdc / 48-230Vac). The current measurement is obtained either by standart current transofrmers /1 or /5, or by special Low Power Current Transformers (LPCT). SIL-A Adaptation B with trip bus protection function is available through configurable inputs and outputs thanks to the programmable logic.

SIL-A Over Current & Earth Fault Relay

Protection Function ANSI     Protection Function ANSI
Three-phase overcurrent protection INST,DT or IDMT 50/51     Current unbalance / broken conductor protection INST 46/46BC
Residual overcurrent protection INST, DT or IDMT 50/51N     Cold Load Pick-Up (CLP) – Trip Bus 68
AC Circuit Brekaer 52     Auto-reclose - 0 -> 1 (5 shots) 27
Breaker failure protection 50BF     Trip Circuit Supervision 74TCS
Low or high-impedance restricted earth-fault / cable end differential protection - I0d> 49/49T     Trip Block  
Auto-reclose - 0 -> 1 (5 shots) 79     Current Transformer Supervision 74CT
Restart inhibit / frequent starts 86     Programmable Logic  
Undercurrent monitor 37        
  • Auxiliary Power Supply (24-110Vdc / 48-230Vac)
  • 8 configurable LEDs
  • Direct signalling/control of circuit breaker (52 function) and recloser (79 function)
  • 6 Inputs - 4 Outputs
  • Oscillographic records, fault reports and non-volatile RAM memory: stores multiple events with date/time even without power supply thanks to its internal RTC
  • One rear port on the back with the following options respect to protocols:
  • - IEC60870-103 or Modbus RTU selectable by settings
  • - IEC 61850, DNP3.0 or IEC 60870-5-104 (depending on the model)
  • Two rear ports on the back can be used simultaneously:
  • - ModBus RTU and  IEC60870-5-103, IEC 61850, DNP 3.0 or IEC 60870-5-104




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