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6.3. Circuit-breaker closing and opening
Circuit-breaker operation can be either manual
or electrical (fig. 6 - fig. 7).
a) Manual spring charging operation
To manually charge the closing springs, it is nec-
essary 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 ap-
plied to the lever are <150 N for the EL1operating
mechanism and <200 N for the EL2 operating
mechanism. For the type of operating mecha-
nism, please refer to the rating plate in 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 signalling device (7) appears.
Fig. 7
20
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operations
If the power is cut off during charging, the geared
motor stops and automatically starts recharging
the springs again when the power returns.
In any case, it is always possible to complete
the recharging operation manually.
c) Circuit-breaker closing
The 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 op-
eration can also be carried out remotely by means
of a special control circuit. Closing having taken
place is indicated by the signalling device (6).
d) Circuit-breaker opening
For manual opening, press the pushbutton (4).
When there is a shunt opening release, the op-
eration can also be carried out remotely by means
of a special control circuit. Opening having taken
place is indicated by the signalling device (6).
»
90°
7
2
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