22 GHA l Switchgear extension and replacement of a panel
4 Replacement of a panel within a switchgear system
Fault in a busbar compartment4.4
In the following, a fault in the compartment of BB2 (upper busbar) of panel 7
(Fig. 14) is assumed.
BB2 (top)
BB1 (rear)
Fig. 14
Illustrated: Fault on busbar 2 of panel 7
– Outgoing feeder of panel 7 earthed
– Busbar 2 isolated from power supply and earthed via the bus coupler
Fault in the compartment of busbar BB2
Isolate the fault from the power supply.1.
Circuit-breaker compartment: isolate outgoing feeder of panel from the
power supply, and earth it (see Operating Manual) (Fig. 14).
Busbar compartment: Isolate the relevant busbar - busbar 2 - from the
power supply and earth it (the diagram shows busbar earthing via the bus
coupler, Fig. 14; see also Operating Manual, chap. 6.7).
Warning!
Risk of injuries. The rear busbar (BB1) is in operation and the upper
busbar (BB2) earthed. Comply precisely with all safety provisions.
Inform the manufacturer.2.
Depending on the damage situation, it must be decided whether to repair 3.
the panel concerned, or whether to wait until a new panel is available on
site.
BB1
BB2
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