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6. Assembly of the switchgear at site
6.11 Earthing the switchgear
Connect main earthing bar with connections
provided in every panel.
Ensure protection for the wiring connection of
the floor frame or the erected raised false floor.
Connect the earthing conductor from the earth
electrode, preferably via a removable bolted
connection for testing purposes, to the main
earthing bar of the switchgear.
6.12 Installation of
interconnecting bundles
The interconnecting bundles are supplied rolled
up in the low voltage compartment 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 low voltage
compartment for these lines to be looped
through from panel to panel.
6.13 Final erection work
• Check painted areas of the switchgear for
possible damage, touching up where
required
• Check bolt connections and tighten where
required, in particular all those carried out
during on-site erection of the busbars and
earthing system
• After the lifting eyebolts have been removed,
the Ith limiter auxiliary switch (if delivered)
must be mounted and adjusted
• Clean the switchgear thoroughly
• 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 SYN-setral-EK 339 where
necessary
• Withdrawable circuit-breaker parts must be
inserted and the control wirings connected
• Panels doors must be properly closed
6.14 Note on M&D
• Due to access needed to replace a
temperature sensor, Monitoring and
Diagnostics is not applicable for wall-
standing switchgears
• Environmental sensor on low-voltage
compartment door for monitoring the
switchroom temperature and humidity, if
used, has to be kept away from heat/cold
sources such as heating and A/C, to ensure
measured values represent real condition in
the switchroom
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