ABB NAL Series Mounting And Operation Manual

NAL/NALF – Mounting and operation manual 25
17.0 Insulator for fusebase and quick make earthing
switch Fig. 71
1. Unscrew 4.2 and detach the fuse clips and contact block
respectively.
2. Unscrew 4.3 at the base of the insulator and detach the
insulator.
3. Attach the new insulator to the frame by the two self-tapping
screws 4.3. For correct torque see page 29.
Note the washer and spring washer for the screws.
4. Attach the fuse clips and contact block respectively to the
top of the insulator by the screws 4.2.
For correct torque see page 29.
b
Fig. 71 Support insulators | Fig. 72 Detached draw bar
Fig. 71 Fig. 72
18.0 Changing parts in NAL 36 kV
18.1 Changing contact knives
Disconnect the switch-disconnector. When A-mechanism is
fitted, the opening spring must NOT be charged.
1. The draw bar is detached from the crank arm of the opera-
ting shaft, see Fig. 72.

ABB NAL Series Specifications

General

Brand	ABB
Model	NAL Series
Category	Switch
Language	English