ABB Relion 650 Series Technical Manual page 501

1MRK 506 326-UUS B
time. This factor is added with the
the value set with the
The last measured opening travel time tTravelOpen and the closing travel time tTravelClose
are available through the Monitored data view on the LHMI or through tools via communications.
Alarm limit check
When the measured open travel time is longer than the value set with the
TRVTOAL output is activated. Respectively, when the measured close travel time is longer than the
value set with the
It is also possible to block the TRVTCAL and TRVTOAL alarm signals by activating the BLOCK input.
13.17.7.4 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.
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Figure 257: 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
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
exceeds the limit value set with the
The binary outputs OPRLOALM and OPRALM are deactivated when the BLOCK input is activated.
Line distance protection REL650
Technical manual
CloseTimeCorr (t
tCloseAlm setting, the , the TRVTCAL output is activated.
OpNumAlm threshold setting. However, if the number of operations increases further and
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OpenTimeCorr (=t
+t ). The closing time is calculated by adding
1 2
+t ) setting to the measured closing time.
3 4
CountInitVal parameter and can be reset by Clear CB wear in
OpNumLO setting, the OPRLOALM output is activated.
Section 13
Monitoring
tOpenAlm setting, the
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