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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
Undervoltage
release
• If the motor-wound spring operating mechanism is equipped with
undervoltage release and slow switching on or off is necessary, the
undervoltage release must be blocked.
Illustration 18
71.71
71.71 Undervoltage release
Illustration 19
Blocking lever in operating position
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