Table of Contents
Advertisement
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 fixed part are fitted with a lock which prevents the fixed 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 fixed 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
Fig. 28
NOTE
In relation to the fixed part, the circuit-breaker (moving part) can
take up different positions, identified as follows:
- DISCONNECTED: the moving part is inserted in the fixed 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 DIS-
CONNECTED. The switchgear compartment door can be closed.
- TEST ISOLATED: the moving part is inserted in the fixed 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 offline
tests. The indicator (9, Fig. 23) indicates TEST ISOLATED.
- CONNECTED: the moving part is fully inserted in the fixed
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.
a) Positioning the moving part in the fixed part in the
DISCONNECTED position
Lift the moving part as shown in the paragraph (3) and insert it in
the fixed part guide, tilting it as shown in figure 29.
The manual connection must allow the edge (E) of the circuit-
breaker guide to slide under the blocks (D) of the fixed part.
Remove the lifting devices.
Push the moving part as far as the stop in the fixed part.
Close the compartment door.
B2342
Model
Press
C
Fig. 29
Apparatus
1SDH000909R0001
Doc. No
Emax VF
Scale
Page No
17/66
Advertisement
Table of Contents
