Operation Counter - ABB Relion Technical Manual

1MRK 502 048-UUS A
14.17.7.4
14.17.7.5
Technical manual

Operation counter

The operation counter subfunction calculates the number of breaker operation cycles.
Both open and close operations are included in one operation cycle. The operation counter
value is updated after each open operation.
The operation of the subfunction can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
GUID-FF1221A4-6160-4F92-9E7F-A412875B69E1 V1 EN
Figure 269: Functional module diagram for counting circuit breaker operations
Operation counter
The operation counter counts the number of operations based on the state change of the
binary auxiliary contacts inputs POSCLOSE and POSOPEN.
The number of operations NO_OPR is available through the Monitored data view on the
LHMI or through tools via communications. The old circuit breaker operation counter
value can be taken into use by writing the value to the CountInitVal parameter and can be
reset by Clear CB wear in the clear menu from LHMI.
Alarm limit check
The OPRALM operation alarm is generated when the number of operations exceeds the
value set with the OpNumAlm threshold setting. However, if the number of operations
increases further and exceeds the limit value set with the OpNumLO setting, the
OPRLOALM output is activated.
The binary outputs OPRLOALM and OPRALM are deactivated when the BLOCK input is
activated.
y
Accumulation of I t
y
Accumulation of the I t module calculates the accumulated energy.
The operation of the module can be described by using a module diagram. All the modules
in the diagram are explained in the next sections.
Section 14
Monitoring
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