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A S S E M B L Y O F T H E S W I T C H G E A R O N S I T E
5.10.2 Control cables
The control cables are conveyed into the panel
through the control wiring duct on the left-hand
side of the panel. Mounting procedure:
•
Insert the cables into the control wiring duct
on the left-hand side. The duct is covered by
covers
•
Fasten the control cables at the top end of the
duct, stripthe insulation and convey the cable
control cores into the low-voltage compartment
after the terminal strip frame has been swung up
•
Connect the control cables to the terminal strip
according to the circuit diagram
•
Control wiring connections to adjacent panels
are made using a bushing
5.11 Earthing the switchgear
•
Connect the main earthing bar to the connections
provided in every panel
•
The floor frame or the erected raised false floor
needs to be protected using the correct wiring
connection
•
Connect the earthing conductor - coming from
the earth electrode preferably via a removable
bolted connection for testing purpose - to the
main earthing bar of the switchgear
—
Figure 60 An open terminal frame
5.12 Laying the ring circuits
The ring circuits are supplied - as a rolled-up
bundle - in the control cabinet or in the accessories.
They are marked and fitted with ferrules or
connectors at both ends.
Openings are provided in the side walls of the
control cabinet so that these lines can be looped
through from panel to panel.
5.13 Final erection work
•
Check painted areas of the switchgear for
possible damage and touch up where required
•
Check bolt connections, in particular all those
made during the on-site erection of the busbars
and earthing system. Tighten if required
•
Thoroughly clean the switchgear
•
Remove all foreign bodies from the panels
•
Correctly replace all coverings, etc. removed
during erection and connection
•
In the enclosure, any remaining openings must
be closed if they are no longer needed
•
Check the isolating contacts and interlocking
mechanisms for smooth motion, and grease
again with isoflex topas NB 52 where necessary
•
The withdrawable circuit-breaker parts must
be inserted and the control wirings connected
•
The panels doors must be properly closed
41
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