Operation Counter - ABB RET650 Technical Manual

1MRK 504 135-UEN A
14.17.7.4
Technical manual
GUID-3AD25F5A-639A-4941-AA61-E69FA2357AFE V1 EN
There is a time difference t
opening of the POSCLOSE auxiliary contact. Similarly, there is a time gap t
the time when the POSOPEN auxiliary contact opens and the main contact is
completely open. Therefore, in order to incorporate the time t
needs to be added with t
the OpenTimeCorr (=t +t
1
with the CloseTimeCorr (t
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 tOpenAlm
setting, the TRVTOAL output is activated. Respectively, when the measured close
travel time is longer than the value set with the tCloseAlm setting, the TRVTCAL
output is activated.
It is also possible to block the TRVTCAL and TRVTOAL alarm signals by activating
the BLOCK input.

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.
between the start of the main contact opening and the
1
to get the actual opening time. This factor is added with
Open
). The closing time is calculated by adding the value set
2
+t ) setting to the measured closing time.
3 4
Section 14
Monitoring
between
2
+t , a correction factor
1 2
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