ABB REG670 - Circuit Breaker Operation Monitoring

POSCLOSE
POSOPEN
RSTCBWR
BLOCK
BLKALM
Operation
counter
Alarm limit
Check
NOOPER
OPERALM
OPERLO
IEC12000617 V2 EN
Figure 433: Functional module diagram for circuit breaker operation cycles
Operation counter
The operation counter counts the number of operations based on the state of change of
the auxiliary contact inputs POSCLOSE and POSOPEN.
The number of operations NOOPER is given as a service value. The old circuit
breaker operation counter value can be used by adding the value to the InitCounterVal
parameter and can be reset by Clear CB wear in the Clear menu on the LHMI or
activating the input RSTCBWR.
Alarm limit check
OPERALM is generated when the number of operations exceeds the set value of the
OperAlmLevel threshold setting.
If the number of operations increases and exceeds the limit value set with the
OperLOLevel setting, the OPERLO output is activated.
The binary outputs OPERALM and OPERALO are deactivated when the BLKALM input
is activated.
16.4.7.6 Circuit breaker operation monitoring
The circuit breaker operation monitoring subfunction indicates the inactive days of
the circuit breaker and gives an alarm when the number of days exceed the set level.
The operation of the circuit breaker operation monitoring is shown in figure
434.
POSCLOSE
POSOPEN
BLOCK
BLKALM
Inactive timer
Alarm limit
Check
INADAYS
MONALM
IEC12000614 V2 EN
Figure 434: Functional module diagram for circuit breaker operation monitoring
1MRK502052-UEN B Section 16
Monitoring
907
Technical manual