Mitsubishi Electric C Series Handling And Maintenance page 56

Caution on manual operation
[Turning ON]
(i) Shift MANU/AUTO selector switch to MANU. When MANU has been selected, the electric
operation circuit will be automatically open.
(ii) Press ON button. The latch mechanism is disengaged and the accumulated force of the input
spring turns the breaker ON. The ON button operating load is approx. 50 N.
[Turning OFF]
(i) Shift MANU/AUTO switch to MANU. When MANU has been selected, the electric operation
circuit will be automatically open.
(ii) Draw out the manual handle and reciprocate it a few tens of times to turn the breaker OFF and
charge the input spring.
<<For 50·100·125AF>>
Reciprocate the manual handle a few times. The breaker status will be indicated as "TRIP",
and the spring status, "Discharge". In such a case, the input spring is not fully charged. So
reciprocate the manual handle until "Charge" is indicated.
<<For 225·250AF>>
Reciprocate the manual handle until the breaker status is indicated as "OFF".
The breaker can be turned OFF without shifting the selector switch to MANU. However, the
breaker is also controlled by remote operation, so operate the handle after shifting the selector
switch to MANU.
(iii) After reciprocating the handle, be sure to return the MANU/AUTO selector switch to AUTO.
When the switch has returned to AUTO, the electric operation circuit is automatically closed.
Note: When MANU is selected with the MANU/AUTO selector switch, the breaker cannot be elec-
trically (remotely) operated. So be sure to return the selector switch to AUTO after ending
manual operation.
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