Alstom SF6 User Manual

H48.020.249en/2
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Manual Operations
Motor-wound spring operating mechanism FK3-07
for outdoor circuit breaker
26.04.2011
© ALSTOM
• Tighten the bolts 78.31 of the clamping bar 71.63 of the return stop 70.02
to 47 Nm ±10%.
• Iftheclampingboltsarenottightenedtothespeciedtorque,thereturn
stop will not work properly.
• If, in this case, when using the hand crank to charge the closing spring,
the hand crank is released before the end position is reached, it will spin
backwards at high speed and thus become an accident hazard.
CAUTION!
After doing any work (manipulation) on the return stop,
the bolts of the clamping bar of the return stop must be
tightened to a torque of 47 Nm ±10%.
Return stop
fastening
• Iftheclampingboltsarenottightenedtothespeciedtorque,thereturn
stop will not work properly.
• If, in this case, when using the motor to charge the closing spring, the
motor voltage is interrupted, the closing spring will discharge by rotating
the winding gears backwards. This could result in damage to the motor-
wound spring operating mechanism.
NOTE!
After doing any work (manipulation) on the return stop,
the bolts of the clamping bar of the return stop must be
tightened to a torque of 47 Nm ±10%.
• The blocking device of the motor limit switch 71.75 must be removed so that
the motor limit switch can function again.
• If the blocking device of the motor limit switch is not removed, the motor
limit switch will not work.
• If, in this case, the closing spring is charged by the motor, the motor voltage
will not be interrupted and the motor will be destroyed as a result.
Remove the blocking
device of the motor
limit switch
NOTE!
After doing any work (manipulation) on the motor-
wound spring operating mechanism that requires the
blocking device of the motor limit switch to be tted,
this must be removed.

Alstom SF6 Specifications

General

Brand	Alstom
Model	SF6
Category	Circuit breakers
Language	English