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Busbars for 24 kV panels
Busbars and branches are made of copper and
both have a flat cross-section. The bushings are
different from the 12 / 17.5 kV versions. They are
single for each phase and have an electrode
inside, which must be connected to the busbar.
Busbars for 24 kV panels are insulated by means
of shrink fitting sheaths and the connection
points are covered by insulating covers.
Important note:
The contact springs must be inserted during the
installation of busbars. These contact springs
make the connection between the busbar and
the metal tube and prevent damage caused by
partial discharges inside the bushing on live
busbars.
Important note:
Always check that there is good contact
between the metal tube in the bushing and the
busbars via contact spring. Ensure that the
contact spring is in the correct position!
Figure 116:
1 nr. 4 10x35 screws
2 nr. 8 M10 washers
3 nr. 4 M10 nuts
—
6. Assembly of the switchgear at site
Figure 117:
1; 2 Contact spring
24 kV panels - T-off 1 250 A, busbars 1 250 A
24 kV panels - detail of the
busbar bushing, sectional view
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