ABB REB650, Technical Manual

Page: 332 / 504

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.
GUID-3AD25F5A-639A-4941-AA61-E69FA2357AFE V1 EN
There is a time difference t
1
between the start of the main contact opening and the
opening of the
POSCLOSE
auxiliary contact. Similarly, there is a time gap t
2
between
the time when the
POSOPEN
auxiliary contact opens and the main contact is
completely open. Therefore, in order to incorporate the time t
1
+t
2
, a correction factor
needs to be added with 10 to get the actual opening time. This factor is added with the
OpenTimeCorr (=t
1
+t
2
). The closing time is calculated by adding the value set with the
CloseTimeCorr (t
3
+t
4
) setting to the measured closing time.
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.
Section 12
1MRK 505 277-UUS C
Monitoring
326
Technical Manual