Troubleshooting Chart - Eaton W-VACi 12 kV User Manual

4.8

Troubleshooting Chart

Symptom
Closing-spring
not charged
Closing-spring
charged but breaker
does not close
Breaker does not
close when manually
pushing the close
button
Breaker does not
rack in
Inspection area
Motor Circuit
Shunt Closing Release circuit,
when the plunger of the shunt
does not pick up
Mechanical Interlock, may
override the plunger of the shunt
close release may pick up
Closing spring is released, but
the breaker fails to close.
Electromechanical Interlock
Electromechanical Interlock
65A7355H01 November 2011 www.eaton.com
Probable cause
Fail to Close
● No control power
（fuse blown or switch off）
● Secondary disconnect is not connected
● Motor cut-off switch or its push lever is damaged
● Loose wire terminal connections
● Motor failure
● No control power, or its out of voltage range
（fuse blown or switch off, or wrong voltage applied)
● Secondary disconnects is not in service
● Anti-pumping device is in service
● Shunt closing release failure
● The breaker is between service and test position
when it is in the switchgear
● The breaker is between service and test position
when it is in the switchgear
● Trip circuit is energized (trip free)
● Trip latch does not reset
 Secondary Disconnect is not pluged in or has no
control power to it
 Check to see if proper secondary control voltage
is applied to the interlock
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