SIL-B FEEDER Protection Relays

SIL-B FEEDER Protection Relays

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.

Main Characteristics:

  • Protection functions available in SIL-B are the following:
    50P (2), 50N/G (2), 67P (2), 67N (2), 46, 59P (2), 59N (2), 27P (2), 32/40 (4), 79, 50BF, 52, 49, 86 Cold Load Pick-up, 49T, 74TCS.
    Optionally: 81 U/O, 25, 37 and IRIG-B.79 protection function (Recloser) allows up to 5 attempts of reclosing which can be programmed by the user.
  • 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).
  • Is used with auxiliary power supply (110-230 Vac/ 90-300 Vdc and optionally 24-48 Vdc).
  • SIL B has metallic box with high electromagnetic compatibility level (EMC) and wide range of operating temperature.
  • Its reduced size makes the SIL B relay easy to install and its light weight helps the customer to save costs in transport.
  • Direct signalling/control both of the circuit breaker (52 function), both of the recloser (79 function).
  •  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
    • IEC 60870-5-103, IEC 61850, DNP 3.0 or IEC 60870-5-104
  •  Shows multiple measurements: Currents, voltages, phase current angles, Cos φ,  powers, frequencys, ….
  • 8 configurable inputs and 7 configurable outputs.
  • 2 Oscillographic records,  20 fault reports and non-volatile RAM memory: stores 1.000 events with date/time even without power supply thanks to its internal RTC.

Specifications