23
≈
90°
7
6
5
4
2
fig. 15
4.6.8. Circuit-breaker closing and opening operations
Circuit-breaker operation can be either manual or electrical
(fig. 15).
a) Manual spring charging operation
To manually charge the closing springs, it is necessary to
repeatedly activate the charging lever (2) (maximum rotation
angle of the lever: about 90°) until the yellow signalling device
(7) appears which indicates completion of charging.
The maximum forces which can normally be applied to the
lever are < 200 N for the EL2 operating mechanism and
< 250 N for the EL2S operating mechanism. For the type of
operating mechanism, please refer to the rating plate (Fig. 1).
b) electrical spring charging operation
On request, the circuit-breaker can be fitted with the following
accessories for electrical operation:
– geared motor for automatic closing spring charging
– shunt closing release
– shunt opening release
The geared motor automatically recharges the springs after
each closing operation until the yellow signaling device (7)
appears.
If the power is cut off during charging, the geared motor
stops. Automatically the motor spring charging starts
recharging the springs when the power returns.
In any case, it is always possible to complete the recharging
operation manually.
c) Circuit-breaker closing
Th operation can only be carried out with the
closing springs completely charged. For manual closing, press
the pushbutton (5). when there is a shunt closing release,
the operation can also be carried out remotely by means of a
special control circuit. Closing having taken place is indicated
by the signaling device (6).
d) Circuit-breaker opening
For manual opening, press the pushbutton (4).
when there is a shunt opening release, the operation can also
be carried out remotely by means of a special control circuit.
Opening having taken place is indicated by the signaling
device (6).
