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
.
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
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