M-LIB3 Low Impedance Bus Differential Relay
6
1.14.2 M-BC3 = Bus coupler / sectionalizer module (SCE1578)
Including :
q sets of three auxiliary CTs : 1 set for each side of the bus coupler.
q 1 Bus coupler trip output.
q 1 Bus Coupler trip input from Feeders’ Breaker Failure Relays
1.14.3 M-LID3 = Numerical biased protection relay
With the following features :
q Double circuit for Biased differential protection.
q Double circuit for unbiased differential protection.
q Double circuit for CT circuits supervision.
q Output relays for phase trip
q 1 Supervision alarm relay
q 1 Internal fault alarm relay
q 1 Lock-out digital input
q 1 Remote trigger input
q Synchronization digital input
q RS 485 communication Port
q Timed supervision alarm
q Timed discrepancy alarm