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The withdrawable modules or trolleys are
available in sizes that are standardised in multiples of 100mm with
200mm (M2) as the minimum trolley size. The sizes are based on the
motor feeder ratings. The trolleys are arranged vertically in a
multi-tier formation. Each vertical can house upto 9 nos. of 7.5 kW DOL
starter modules. Individual motor controls upto a max. of 160kW/215hp
can be housed in individual standard trolleys. The maximum feeder size
is restricted to size 900mm (M9) to ensure ease of handling &
proper alignment of the trolleys. They can be provided with door
interlocking & pad-locking arrangements if required as additional
safety features.
The bolted design
of the panel chassis allows for ease of alteration & extension if
required at site. The design ensures absolute interchangebility between
the withdrawable modules of the same size. The trolley equipped with
the components for the spare feeder in the Mcc is thus fully
interchangeable at site.
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