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3 Extension of an existing double busbar switchgear system
GHA l Switchgear extension and replacement of a panel
Extension on left-hand end of busbar3.4
Reroute all incoming and outgoing feeder panels to busbar 2 (Fig. 4).1.
Isolate busbar 1 from the power supply and earth it (the diagram shows 2.
busbar earthing via the bus coupler, Fig. 4; see also Operating Manual,
chap. 6.7).
Warning!
Risk of injuries! The upper busbar (BB2) is in operation and the rear
busbar (BB1) earthed. Comply precisely with the safety provisions.
BB2 (top)
BB1 (rear)
Fig. 4
All incoming and outgoing feeder panels on busbar 2, busbar 1 earthed with the bus
coupler
Remove left-hand gap cover and end plate and attach busbar identifica-3.
tions.
Remove left-hand metallic protective covers of busbars 1 and 2.4.
5. Remove left-hand end caps of busbar 1 (rear). Clean and grease busbar
bushings on panel 1. Clean, grease and mount silicone sleeves of link (see
Assembly Instructions).
Clean the removed busbar end caps of busbar 1 and reposition them
on the new end panel (see also space assignment plan), unless they are
already provided. Mount metallic protective cover to the new end of
busbar 1.
Line up new panel
BB1
BB2
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General