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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
• The following manual operations can be carried out for inspection purposes
and to eliminate malfunctions:
Motor-wound
spring operating
mechanism mounted
on circuit breaker
and connected
If Then
Illustration 1
Closing spring discharged
Circuit breaker position indicator OFF
• for inspection purposes and
setting work
• Slowly switch on
Illustration 2
Closing spring charged
Circuit breaker position indicator OFF
• for inspection purposes and
setting work
• The circuit breaker may not be
switched on.
• Manually
discharge the
closing spring
Illustration 3
Closing spring discharged
Circuit breaker position indicator ON
• for inspection purposes and
setting work
• Slowly switch off
Illustration 4
Closing spring charged
Circuit breaker position indicator ON
• for inspection purposes and
setting work
• Slowly switch off
Slow
opening
2
1
Slow
opening
Slow
opening
3
Skow
opening
4
manuel discharge
of closing spring
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