Supervision Functions; Trip Circuit Supervision Tcsscbr; Fuse Failure And Current Circuit Supervision Seqrfuf, Ccrdif; Circuit-Breaker Condition Monitoring Sscbr - ABB RELION 630 Series Applications Manual

1MRS756785 G
3.3.7
3.3.7.1
3.3.7.2
3.3.7.3
REM630
Application Manual

Supervision functions

Trip circuit supervision TCSSCBR

Two instances of the trip circuit supervision function are used for supervising Master
trip 1 and Master trip 2. Function continuously supervises trip circuit and alarms in
case of a failure of a trip circuit. The function block does not perform the supervision
itself but it is used as an aid for configuration. To prevent unwanted alarms, the
function is blocked when any of the protection function's operate signals is active or
the circuit breaker is open.
An additional instance of the trip circuit supervision function is used to check the
proper functioning of the closing circuit of the motor circuit breaker. To prevent
unwanted alarms, the function is blocked when the circuit breaker is in closed
position.
The function gives an indication via a LED on the LHMI on detection of any of the trip
circuit failure. Also individual trip circuit alarm indications are connected to the
disturbance recorders.

Fuse failure and current circuit supervision SEQRFUF, CCRDIF

The fuse failure and current circuit supervision functions give an alarm in case of a
failure in the secondary circuits between the voltage transformer or current
transformer and the IED respectively. The set of three phase currents and voltages, I3P
and U3P, are connected to the inputs.
An alarm is available on failure of the secondary circuits. Alarms are recorded by a
disturbance recorder.

Circuit-breaker condition monitoring SSCBR

The circuit-breaker condition monitoring function checks for the health of the circuit
breaker. The circuit breaker status is connected to the function via binary inputs.
Function requires also pressure lockout input and spring charged input connected via
binary input COM_101.BI12 and COM_101.BI13 respectively. Various alarm
outputs from the function are combined in an OR-gate to create a master circuit-
breaker monitoring alarm.
All of the alarms are separately connected to the binary recorder and a combined alarm
is available as an indication via a LED on the LHMI.
Section 3
REM630 variants
57