5-22 F650 Digital Bay Controller GE Multilin
5.3 SYSTEM SETUP 5 SETPOINTS
5
5.3.3.2 BREAKER MAINTENANCE
To consider used breakers, the relay allows to set initial I
2
t values as well as an initial number of operations, in order to
have into account previous breaker operations, as well as operations produced during testing. This breaker maintenance
parameters can be set in the breaker maintenance menu.
BREAKER MAINTENANCE (Setpoint > System Setup > Breaker > Breaker Maintenance)
Table 5â22: BREAKER MAINTENANCE SETPOINTS
In this group of setpoints, the start values of the breaker Counters can be reset.
These Counters allow the breaker Maintenance. They are used to accumulate the breaker aging produced by a trip or a
breaker opening. In order to incorporate the breaker historic, in case of second hand breakers, the system allows assigning
an initial value to cumulated amperes, and to the number of opening and closing operations.
To supervise the breaker aging, î¶(KI)
2
t accumulated values are calculated and stored for each phase in each opening. If
the rated current is not exceeded, as in the case of a manual opening command, without fault current, the relay uses the
rated current value instead of the metered value.
(KI)
2
t value is accumulated and maintained in independent Counters for each phase. Counters can be accessed through
the local HMI as well as through the EnerVista 650 Setup software. The unit incorporates a setpoint to select the integration
time (KI2t Integ. Time) that allows either to assign a fix Opening time, or to leave the relay measure that time, from the
opening command to the breaker opening.
The signals associated to the opened or closed status of the breaker can be monitored at âActual > Status > Breakerâ
Table 5â23: BREAKER STATUS
SETPOINT > SYSTEM SETUP > BREAKER > BREAKER MAINTENANCE
setpoint Description Name Default Value Step Range
KI2t Counter Phase A KI2t BKR Ph A Cnt 0.00 0.01 (KA)2 s [0.00 : 9999.99]
KI2t Counter Phase B KI2t BKR Ph B Cnt 0.00 0.01 (KA)2 s [0.00 : 9999.99]
KI2t Counter Phase C KI2t BKR Ph C Cnt 0.00 0.01 (KA)2 s [0.00 : 9999.99]
Openings counter BKR Openings Cnt 0 1 [0 : 9999]
Closings counter BKR Closings Cnt 0 1 [0 : 9999]
BREAKER STATUS DESCRIPTION
BREAKER OPEN Open breaker status. In the switchgear selected as breaker, besides providing the usual switchgear contact
status, the system provides also the open breaker, closed breaker, and undefined breaker states, as well as
an indication of the set closing and opening failure time for such switchgear.
BREAKER CLOSED Breaker closed
BREAKER UNDEFINED Breaker undefined
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