I N S T A L L A T I O N O F T H E S W I T C H G E A R A T S I T E
35
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Fig. 2.3.4.7.1 Exploded
view of screwing the
voltage transformer
with its bottom sheet
—
Fig. 2.3.4.7.2a Different
position of bores for
different panel width
—
Fig. 2.3.4.7.2b Assemble
landing plate with rivet
nuts
2.3.4.7 Installation of the busbar voltage
transformers
•
The weight of a voltage transformer can be over
30 kg. Use suitable lifting gear (e.g. a mobile
gantry crane) to install the voltage transformers
for busbar measurement (type 3). We recommend
having installation performed by two fitters.
Observe the relevant accident prevention
regulations in the country of installation.
•
The busbar voltage transformers are to be
installed after installation of the busbars and
before the busbar covers are fitted.
•
Perform high-voltage testing of the busbars
before installing the voltage transformers.
•
Before installing the voltage transformers, remove
the insulating plugs from the relevant end or
cross adapters.
The voltage transformer support is compatible
for 12/24 kV VT for each width of panel. But it just
has one different material between different wide
panels (450 mm, 500 mm, 600 mm). The detailed
installation procedure and position will be
illustrated in the following content.
There are five steps in total to install the busbar
voltage transformer.
Step 1
Pre-assemble the voltage transformer with its
bottom sheet by 6 countersunk head screws as
shown in Fig. 2.3.4.7.1.
Step 2
In this step, the rivet nuts need to be fastened with
pressure with all hexagonal bore of support roof
(Fig. 2.3.4.7.2a) and landing plate (Fig. 2.3.4.7.2b).
The installation materials of voltage transformer
are totally the same according to different wide
panels, but the position differs (Fig. 2.3.4.7.2a).
Position A is the bores for width 600 mm panel.
Position B is the bores for width 500 mm panel.
Position C is the bores for width 450 mm panel.
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Fig. 2.3.4.7.2a
—
Fig. 2.3.4.7.2b
—
Fig. 2.3.4.7.1
6 x countersunk head screw, M8x20
Position C Position B Position A
9 x rivet nut, M8
4 x rivet nut, M8
