Poznámky redaktora
3 Racking-in/out operation
WARNING
A) Open the circuit-breaker before carrying out any racking-in/out operation.
a itio fix e
DISCONNECTED position
Lift the moving part shown the paragraph (3) and insert the
fixed part guide, tilting shown figure 29. 23) indicates DISCONNECTED.
- CONNECTED: the moving part fully inserted the fixed part WITH
the connection both the power terminals and the sliding contacts
for the auxiliary circuits.
N S
In relation the fixed part, the circuit-breaker (moving part) can take
up different positions, identified follows:
- DISCONNECTED: the moving part inserted the fixed part
WITHOUT any connection between the power term inals and
WITHOUT coupling the sliding contacts for the auxiliary circuits: in
this position all electrical operation ofthe circuit-breaker prevented.
18/158
.
- TEST ISOLATED: the moving part inserted the fixed part
WITHOUT any connection between the power terminals, but WITH
the sliding contacts coupled for the auxiliary circuits. The circuit-breaker operational. The
switchgear compartment door can closed.7.
The position reached stable and allows for any inspections the
circuit-breaker. The indicator
(9, Fig.
B) The circuit-breaker (moving part) and fixed part are fitted with lock which prevents the fixed part from being racked into the circuit-breakers
with different rated current: the congruence the anti-racking-in lock must checked the operator before carrying out the racking-
in operation avoid any unnecessary stress.
Close the compartment door.
On the front the indicator (9, Fig. 23) indicates CONNECTED.
The manual connection must allow the edge (E) the circuit-breaker
guide slide under the blocks (D) the fixed part.
Model L2234 Apparatus Scale
L 2778
Doc No' 1SDH000460R0002
Page No. Remove the lifting
devices. 23) indicates TEST ISOLATED.
Push the moving part far the stop the fixed part. this position,
the circuit-breaker can operated for the offline tests. The
indicator (9, Fig.
C) Before the racking-in operation, remove any padlock the segregation shutter the isolation terminals the fixed part
