Circuit-Breaker Failure Protection Ccbrbrf; Tripping Logic Trpptrc - ABB RELION 630 Series Applications Manual

Section 3
REG630 variants
3.2.6.16
3.2.6.17
42
The start and operate signals from the both underpower protection
instances are used only for alarm purposes, not for tripping the
generator circuit breaker.

Circuit-breaker failure protection CCBRBRF

The function is activated by the common operate command from the protection
functions. The breaker failure function issues a retrip command to Master trip 2 if the
Master trip 1 fails to trip the protected component. A set of three-phase neutral side
current, I3P_N is connected to the input.
A circuit-breaker failure is detected by measuring the current, or by detecting the
remaining trip signal. Retrip is used for increasing the circuit breaker's operational
reliability. Retrip as well as backup trip are also connected to provide a LED
indication on the LHMI. These signals are also connected to the disturbance recorder.

Tripping logic TRPPTRC

Tripping logic provides a tripping signal of required duration to the Master trip 1 and
Master trip 2 circuits. The Master trip 1 opens the circuit breaker on a receipt of
operate signal from the protection function, whereas the Master trip 2 opens the circuit
breaker on a receipt of operate signal from the protection function, or a retrip signal
from the circuit breaker failure protection.
Two master tripping signals are available at binary output PSM PO1 and PSM PO3.
The lockout reset binary input available at COM BI10 is connected to the tripping
circuit to reset the circuit-breaker lockout function.
1MRS757582 C
REG630
Application Manual