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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
Possible manual operations
• The motor-wound spring operating mechanism is attached to the circuit
breaker in accordance with the "Mounting instructions" in its as-delivered
state.
• If the as-delivered state of the non-connected operating mechanism has
been altered in error, the following manual operations can be carried out to
restore it to its as-delivered state.
Not connected
motor-wound spring
operating mechanism
If Then
Illustration 1
Closing spring discharged
Circuit breaker position indicator OFF
• No action (as-
delivered state)
Illustration 2
Closing spring charged
Circuit breaker position indicator OFF
• Manually
discharge the
closing spring
Illustration 3
Closing spring discharged
Circuit breaker position indicator ON
1)
• Slowly switch off
Illustration 4
Closing spring charged
Circuit breaker position indicator ON
1)
• Slowly switch off
Note:
1)
If the motor-wound spring operating mechanism without circuit breaker was
switched, contact should be made with the supplier's plant to clarify the
situation with regard to any damage.
manuel discharge
2
of closing
spring
1
Slow
opening
4
3
Slow
opening
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