Breaker Contact Travel Time - ABB REG650 Technical Manual

Section 13
Monitoring
13.15.7.3
434
Inactivity timer
The module calculates the number of days the circuit breaker has remained
inactive, that is, has stayed in the same open or closed state. The calculation is done
by monitoring the states of the POSOPEN and POSCLOSE auxiliary contacts.
The inactive days NOOPRDAY is available through the Monitored data view. It is
also possible to set the initial inactive days by using the InactDayInit parameter.
Alarm limit check
When the inactive days exceed the limit value defined with the InactDayAlm
setting, the NOOPRALM alarm is initiated. The time in hours at which this alarm is
activated can be set with the InactHourAlm parameter as coordinates of UTC. The
alarm signal NOOPRALM can be blocked by activating the binary input BLOCK.

Breaker contact travel time

The breaker contact travel time module calculates the breaker contact travel time
for the closing and opening operation. The operation of the breaker contact travel
time measurement can be described by using a module diagram. All the modules in
the diagram are explained in the next sections.
GUID-4D82C157-53AF-40C9-861C-CF131B49072B V1 EN
Figure 210: Functional module diagram for breaker contact travel time
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.
1MRK 502 034-UEN -
Technical Manual