GE Power Management
489 Generator Management Relay 5-21
5 ACTUAL VALUES 5.5 A4 MAINTENANCE
5
5.5.2 GENERAL COUNTERS
One of the 489 general counters will count the number of breaker operations over time. This may be useful information for
breaker maintenance. The number of breaker operations is incremented whenever the breaker status changes from closed
to open and all phase currents are zero. Another counter counts the number of thermal resets if one of the assignable digi-
tal inputs is assigned to thermal reset. This may be useful information when troubleshooting. When either of these counters
reaches 50000, that counter will reset to 0. Each counter can also be cleared using the
S1 489 SETUP \ CLEAR DATA \ CLEAR
BREAKER INFORMATION
setpoint. The number of breaker operations will not update if a digital input programmed as Test
Input is shorted.
5.5.3 TIMERS
The 489 accumulates the total online time for the generator. This may be useful for scheduling routine maintenance. When
this timer reaches 1000000, it resets to 0. This timer can be cleared using the
S1 489 SETUP \ CLEAR DATA \ CLEAR GENERA-
TOR INFORMATION
setpoint. The generator hours online will not update if a digital input programmed as Test Input is shorted.
îš„
GENERAL COUNTERS
îš„
[ENTER] for more
NUMBER OF BREAKER
OPERATIONS: 0
Range: 0 to 50000
NUMBER OF THERMAL
RESETS: 0
Range: 0 to 50000. Seen only if a digital input is assigned
to Thermal Reset.
îš„
TIMERS
îš„
[ENTER] for more
GENERATOR HOURS
ONLINE: 0 h
Range: 1 to 1000000 hrs.
MESSAGE
ESCAPE
To Next Page
Loading...
Need help?
General
