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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
• The turned-and-held blocking device of the closing latch 70.71 may now be
pushed in further in the direction of the arrow until it is up against the end
stop (insertion force approx. 60 N), as shown by illustration 10. The blocking
device of the closing latch 70.71 is now in place and may be released. It is
held by the charged spring 71.65 and the snap-action device.
Illustration 10
End stop Snap-action device
• The closing latch is now blocked and the operating mechanism cannot be
switched on.
Remove the blocking
device of the tripping
latch
• Insert the blocking device of the tripping latch 71.56 into the appropriate
opening, as shown by illustration 11.
Illustration 11
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