Earthing Switch For Busbar Earthing - ABB UniGear ZS1 Instruction Manual

Figure 81: 12/17.5kV panels - Top-mounted box with voltage transformers for busbar metering. The figure shows the
arrangement in panels without the busbar bushing plate 28 (see the notes in section 5.7.1)
28.3 Partitioning
79 Top-mounted box with voltage transformer
79.1 Intermediate box
79.2 Conductor tube
79.3 Reducer ring
79.4
79
2.3
28
Figure 82: 24 kV panels - Top-mounted box with high voltage transformers for busbar metering. The figure shows the
arrangement in panels with busbar bushing plate 28 and bushings 29
2.3 Flat branch conductor for voltage transformers
28 Bushing plate
79 Top-mounted box for busbar voltage transformers
79.1 Intermediate box
79.2 Conductor tube
79.3 Reducer ring
79.4 Pressure relief
52

5.7.2 Earthing switch for busbar earthing

• Top-mounted box 77 (figure 83) with screw fixing material from the "top-mounted box for earthing"
set of bags must be mounted on the busbar compartment;
• Operating mechanism box 78 with screw fixing material from the "top-mounted box for earthing" set
of bags must be mounted on the control cabinet;
• Pre-mounted single parts of hexagonal shaft 78.1 must be removed. Pay attention to the sequence
and angling of the parts!,
79
79.2
28.3
79.2
79.3 79.1
79.3 79.1