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5-22 489 Generator Management Relay GE Multilin
5.5 A4 MAINTENANCE 5 ACTUAL VALUES
5
5.5.2 GENERAL COUNTERS
PATH: ACTUAL VALUES ÖØ A4 MAINTENANCE ÖØ 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 ÖØ CLEAR DATA ÖØ
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
PATH: ACTUAL VALUES ÖØ A4 MAINTENANCE ÖØ 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 ÖØ CLEAR DATA ÖØ CLEAR
GENERATOR INFORMATION setpoint. The generator hours online will not update if a digital input programmed as Test Input is
shorted.
GENERAL COUNTERS
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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.
TIMERS
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GENERATOR HOURS
ONLINE: 0 h
Range: 1 to 1000000 hrs.
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