ABB REG650 Technical Manual page 496

Section 14
Monitoring
490
Traveling time calculator
The contact travel time of the breaker is calculated from the time between auxiliary
contacts' state change. The open travel time is measured between the opening of the
POSCLOSE auxiliary contact and the closing of the POSOPEN auxiliary contact.
Travel time is also measured between the opening of the POSOPEN auxiliary contact
and the closing of the POSCLOSE auxiliary contact.
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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 10 to get the actual opening time. This factor is added with the
OpenTimeCorr (=t +t ). The closing time is calculated by adding the value set with the
1 2
CloseTimeCorr (t +t ) setting to the measured closing time.
3 4
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.
between the start of the main contact opening and the
1
1MRK 502 043-UUS B
between
2
+t , a correction factor
1 2
Technical Manual