ABB eVD4, Инструкция по установке и обслуживанию, Страница: 55 / 72

53 53
24 Nm
25 Nm
10 Nm
24 Nm
25 Nm
24 Nm
Screw tightness test
– The screws and nuts are tightened in the factory and
correct tightening is marked with a coloured sign. No
further tightening operations should be required during the
operating life of the circuit-breaker. Should the screws or
nuts need to be re-tightened after maintenance operations,
always replace them and comply with the values given in fig.
12.
9.2.3. Circuit-breaker pole
No other check is necessary, except what has already been
specified in par. 9.2.1.
Fig. 12
9.2.4. Withdrawable assembly (truck and circuit-breaker)
Visually inspect the components, especially those which may
be damaged by incorrect operations (also see table in chap. 8).
Visually inspect the isolating contacts and make sure that all
the contact parts are clean, especially in cases where signs of
overheating are found (also see par. 9.4.).
Visually inspect the locks and perform functional tests to
make sure that they function properly and activate without
abnormal force - maximum 25 N (also see table in chap. 8).