VD4/R - VD4/L - VD4/R-SEC - VD4/L-SEC - INSTALLATION AND OPERATING INSTRUCTIONS 22
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6. Instructions for circuit breaker operation
6.3 Circuit breaker closing and
opening operations
Circuit breaker operation can be either manual or
electrical.
a) Manual loading of the closing springs (fig. 6)
Repeatedly operate the loading lever (2) (the
lever’s maximum angle of rotation is about 90°)
until the yellow indicator appears (5).
Maximum force that can normally be applied to
b) Electrical loading of the closing springs
On request, the circuit breaker can be fitted with
the following accessories for electrical operation:
gearmotor for automatic loading of the closing
springs
shunt closing release.
When powered, the gearmotor automatically
reloads the springs after every closing operation
until the yellow indicator appears (7).
If there is a power failure during the loading
operation, the gearmotor stops and automatically
continues with the spring loading operation once
the power returns.
However, it is always possible to complete the
loading operation in the manual mode.
To avoid exessive power consumption in
installations with several circuit breakers and a
motor operator, it is advisable to load one
operating mechanism at a time during the
starting stage.
c) Circuit breaker closing
This operation can only be carried out when the
closing springs are fully loaded.
Press the pushbutton (7 - fig. 6) to close the
circuit breaker in the manual mode.
When there is a shunt closing release, the
operation can also be carried out in the remote
mode by means of the special control circuit.
The closed status is signalled by the indicator
(6 - fig. 6).
d) Circuit breaker opening
Press the pushbutton (8 - fig. 6) to open the
circuit breaker in the manual mode.
When there is a shunt opening release, the
operation can also be carried out in the remote
mode by means of the special control circuit.
The open status is signalled by the indicator
(6 - fig. 6).
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