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7.
Model L2234 Apparatus Scale
L 2778
Doc No' 1SDH000460R0002
Page No. this position,
the circuit-breaker can operated for the offline tests.
18/158
.
- CONNECTED: the moving part fully inserted the fixed part WITH
the connection both the power terminals and the sliding contacts
for the auxiliary circuits.
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. The
indicator (9, Fig. 23) indicates CONNECTED. Remove the lifting
devices. 23) indicates DISCONNECTED. 23) indicates TEST ISOLATED.
C) Before the racking-in operation, remove any padlock the segregation shutter the isolation terminals the fixed part. The indicator
(9, Fig.
The position reached stable and allows for any inspections the
circuit-breaker.
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.
On the front the indicator (9, Fig. The circuit-breaker operational.
a itio fix e
DISCONNECTED position
Lift the moving part shown the paragraph (3) and insert the
fixed part guide, tilting shown figure 29.
The manual connection must allow the edge (E) the circuit-breaker
guide slide under the blocks (D) the fixed part.
Push the moving part far the stop the fixed part.
- 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
switchgear compartment door can closed.
Close the compartment door.3 Racking-in/out operation
WARNING
A) Open the circuit-breaker before carrying out any racking-in/out operation
