Manual | MNS-SG Operation and Maintenance 37
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Are all barriers, plates, doors and locks in place?
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Are the bottom plates (if used) properly installed?
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Are all tools, dirt/debris, shipping/packing materials or
other foreign objects removed from inside the
switchgear?
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Is the equipment properly grounded?
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Are the phase sequence and marking correct?
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Have all withdrawable breakers been inserted and
removed to test interlock?
4.11.2.
Prepare to energize switchgear
For arc-resistant switchgear:
Ensure that the flaps on the chimney are closed.
These flaps are hinged and can be pushed closed by hand.
Push to
open flaps
Ensure that the flaps on the rear covers/doors are open. To
open the covers, push the flap stopper until it contacts the
cover/door.
Rear flaps
in closed position
Rear flaps
in open position
If the switchgear is equipped with a plenum, ensure that the
end flaps are closed position. Push the flaps closed by hand
or, if too high to reach, using a pole.
Flaps in open position
Flaps in closed position
End flaps
in open position
End flaps
in closed position
Flap
stopper
Push to
open flaps
Push to
close flaps
