GE MiCOM P145 Agile - Setting the Thresholds for the Operating Time; Setting the Thresholds for Excesssive Fault Frequency

5.1.3 SETTING THE THRESHOLDS FOR THE OPERATING TIME
Slow CB operation indicates the need for mechanism maintenance. Alarm and lockout thresholds (CB Time Maint
and CB Time L
ock
out) are provided to enforce this. They can be set in the range of 5 to 500 ms. This time relates to
the interrupting time of the circuit breaker.
5.1.4 SETTING THE THRESHOLDS FOR EXCESSSIVE FAULT FREQUENCY
Persistent faults will generally cause autoreclose lockout, with subsequent maintenance attention. Intermittent
faults such as clashing v
egetation may r
epeat outside of any reclaim time, and the common cause might never be
investigated. For this reason it is possible to set a frequent operations counter, which allows the number of
operations Fault Freq Count over a set time period Fault Freq Time to be monitored. A separate alarm and lockout
threshold can be set.
P14x Chapter 14 - Monitoring and Control
P14xEd1-TM-EN-1 321