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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
Illustration 43
The circuit breaker position indicator is at the position OFF
• At the end of the process, the trip spring 70.20 is discharged, the crank
wheel 70.30 is at the bottom dead point and the operating mechanism is at
the position OFF.
Return stop
mounting
71.72
• The straight end of the return stop 70.02 is aligned between the holes for
the M10 bolts 71.73 by turning the spur gear 71.72.
• Insert the straight end of the return stop 70.02 into the groove of the
clamping bar 71.63 and then screw the M 10 bolts 71.73 into the clamping
bar 71.63.
• Tightening torque = 47 Nm±10%
71.73 70.02 71.63
71.63 Clamping bar 70.02 Return stop
71.72 Spur gear 71.73 Bolt M10
Illustration 44
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