Handling - ABB hd4 Installation And Service Instructions Manual

4.

Handling

Before carrying out any operation, always check that the
operating mechanism springs are discharged and that the
apparatus is in the open position.
Circuit-breakers up to 24 kV
– To lift and handle the circuit-breaker, use the tool (1) (fig. 2a:
shortest hooks for circuit-breakers up to 17.5 kV; all hooks
for 24 kV circuit-breakers).
– Put the hooks (2) in the holes prepared in the circuit-breaker
frame and lift.
– On completion of the operation (and in any case before
putting into service) unhook the lifting tool (1) (fig. 2b) and
dismantle the crosspiece (2) by unscrewing the screws (3).
1
Fig. 2a
Fig. 2b
8
36 kV circuit-breakers
– Attach the tools (1) to lift and handle the circuit-breaker
(fig. 2c);
– Attach the hooks (2) as illustrated in fig. 2d and lift;
– On completion of the operation, remove the tools (1).
Always take great care during handling not to stress the
insulating parts and the circuit-breaker terminals.
The apparatus must not be handled by inserting
lifting devices directly under the apparatus itself.
Should it be necessary to use this method, place
the circuit-breaker on a sturdy supporting surface
(see fig. 3).
2
1
2
2
3