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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
If Then
Closing spring charged
Operating mechanism at position ON
• Use blocking device of closing
latch 70.71.
• Use blocking device of tripping
latch 71.56.
Closing spring charged
Operating mechanism at position OFF
• Use blocking device of closing
latch 70.71.
Closing spring discharged
Operating mechanism at position ON
• Use blocking device of tripping
latch 71.56.
Illustration 03
70.71 71.56
Illustration 04
70.71
Illustration 05
71.56
70.71
Closing latch blocking device
71.56
Blocking device of tripping latch
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