L6555
Emax
17/74
Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
7.3. Racking-in/out
operation
WARNING:
A) Open the circuit-breaker before carrying out any racking-in/out operation.
B) The circuit-breaker (moving part) and fi xed part are fi tted with a lock which prevents the fi xed part from being racked
into the circuit-breakers with a different rated current: the congruence of the anti-racking-in lock must be checked
by the operator before carrying out the racking-in operation to avoid any unnecessary stress.
C) Before the racking-in operation, remove any padlock on the segregation shutter of the isolation terminals on the fi xed
part.
WARNING ELECTRICAL SHOCK HAZARD: Ensure that the circuit-breaker is either disconnected from all power
sources and that the circuit breaker is open before performing any racking-in/out operation.
A
B
C
Fig. 28
Press
NOTE
In relation to the fi xed part, the circuit-breaker (moving part) can
take up different positions, identifi ed as follows:
- DISCONNECTED: the moving part is inserted in the fi xed
part WITHOUT any connection between the power terminals
and WITHOUT coupling the sliding contacts for the auxiliary
circuits: in this position all electrical operation of the circuit-
breaker is prevented. On the front the indicator (9, Fig. 23)
indicates DISCONNECTED. The switchgear compartment
door can be closed.
- TEST ISOLATED: the moving part is inserted in the fi xed part
WITHOUT any connection between the power terminals, but
WITH the sliding contacts coupled for the auxiliary circuits. In
this position, the circuit-breaker can be operated for the offl ine
tests. The indicator (9, Fig. 23) indicates TEST ISOLATED.
- CONNECTED: the moving part is fully inserted in the fi xed
part WITH the connection of both the power terminals and the
sliding contacts for the auxiliary circuits. The circuit-breaker is
operational. The indicator (9, Fig. 23) indicates CONNECTED.
Fig. 29
