Alarm limit check
The
IPOWALPH
alarm is activated when the accumulated energy exceeds the set value
AlmAccCurrPwr.
IPOWLOPH
is activated when the accumulated energy exceeds the limit of the
LOAccCurrPwr
setting.
The
IPOWALPH
and
IPOWLOPH
outputs can be blocked by activating the binary input
BLKALM
.
16.4.7.5
Circuit breaker operation cycles
GUID-D3481D26-2E42-455E-8DB2-91538421F3B1 v8
The circuit breaker operation cycles subfunction counts the number of closing-opening sequences
of the breaker. The operation counter value is updated after each closing-opening sequence. The
operation is described in
.
POSCLOSE
POSOPEN
RSTCBWR
BLOCK
BLKALM
Operation
counter
Alarm limit
Check
NOOPER
OPERALM
OPERLO
IEC12000617 V2 EN-US
Figure 551: 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
GUID-6DAE4C6B-BD66-49CD-817D-08E4EBF47DE0 v8
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
.
1MRK 502 066-UUS B
Section 16
Monitoring
1057
Technical manual
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