L2275
Emax UL
15/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
Fig. 25
Fig. 26
3
5
6
2
3
6
Fig. 27
3
1
7.2
Closing and opening operations of the power circuit
breaker
Operation of the power circuit breaker can be either manual or electrical.
a ) Manual charging operation of the closing springs
– Make sure that the indicator (3) shows "O" (circuit-breaker open)
– Make sure that the indicator (6) is WHITE (springs discharged)
– Repeatedly activate the lever (2) until the indicator (6) changes its
color to YELLOW
b) Electrical charging operation of the closing springs
The electrical operation of the power circuit breaker is possible when
the following accessories (supplied on request) are present:
– geared motor for automatic charging of the closing springs
– closing coil
– shunt trip.
The geared motor automatically recharges the springs after each
closing operation until the yellow indicator appears (6, Fig. 25). When
the power is cut off during charging, the geared motor stops and
automatically starts recharging the springs again when the power
returns. It is, in any case, always possible to complete the recharging
operation manually.
Press
Press
d) Opening the power circuit breaker
For manual opening of the power circuit breaker, press pushbutton “O” (1). When there is a shunt trip, the operation can also be carried out remotely
by means of the special control circuit. Opening having taken place is signaled by the letter “O” appearing in the indicator (3).
c ) Closing the power circuit breaker
The operation can only be carried out with the closing springs fully charged.
For manual closing, press the pushbutton (5) marked with the letter “I”. When there is a closing coil, the operation can be carried out remotely
by means of the special control circuit. Closing having taken place is signaled by the special indicator (3) which goes to indication “I”. Furthermore,
the indicator of the state of the springs (6) goes to the WHITE position. Even with the closing springs discharged, the operating mechanism conserves
enough energy for the opening operation. The geared motor, if present, immediately starts the automatic spring recharging operation.
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