Table of Contents
Advertisement
7.2. Circuit-breaker closing and opening procedures
The operation of the circuit-breaker can be either manual or electrical.
a) Manual loading of the closing springs
- Make sure that the indicator (3) shows "O" (circuit-breaker open)
- Make sure that the indicator (6) is WHITE (springs unloaded)
- Repeatedly activate the lever (2) until the indicator (6) changes
its color to YELLOW
b) Electrical loading of the closing springs
The electrical loading of the circuit-breaker is possible when
the following accessories (supplied on request) are present:
– geared motor for automatic loading of the closing springs
– shunt closing release
– shunt opening release.
The geared motor automatically reloads the springs after each
closing operation until the yellow indicator appears (6, Fig. 25).
When the power is cut off during loading, the geared motor stops
and automatically starts reloading the springs again when the
power returns. It is, in any case, always possible to complete
the reloading operation manually.
c) Closing the circuit-breaker
The operation can only be carried out with the closing springs fully loaded. For manual closing, press the pushbutton (5) marked
with the letter "I". When there is a shunt closing release, the operation can be carried out remotely by means of the special control
circuit. The special indicator (3) changes to indicate "I" to signal that the circuit-breaker has closed. Furthermore, the indicator of
the state of the springs (6) goes to the WHITE position. Even with the closing springs unloaded, the operating mechanism retains
enough energy for the opening operation. The geared motor, if any, immediately starts the automatic spring reloading operation.
Fig. 26
d) Opening the circuit-breaker
For manual opening of the circuit-breaker, press pushbutton "O" (1). When there is a shunt opening release, 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).
Fig. 27
Model
L6555
Fig. 25
3
1
3
2
3
6
5
6
Apparatus
Doc. no.
1SDH000460R0002
Press
Press
Emax
Page No
Scale
16/74
Hide quick links:
Advertisement
Table of Contents
