GE Industrial Solutions AKD-20 Low Voltage Switchgear - Manuel (Page 55)

AKD-20 Low-voltage Switchgear
Chapter 7. Operating the Switchgear
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Padlocking the Shutter (See Fig. 7-8)
1. Shutter locking rod
2. Shutter padlock tab
Fig. 7-8. Shutter padlocking
The shutter on each cubicle can be padlocked to prevent access
to the live primary conductors. The shutter can be padlocked
without the breaker installed. One padlock can be placed on a
cassette. To padlock shutter, pull out the shutter locking tab and
insert padlock, see Fig 7-8. Pulling out the shutter locking tab
actuates a rod (1) that goes through stationary and moving
shutter parts that prevents it from opening.
Removing Entelliguard G Shutter Units (on a de-
engergized cubicle)
Visual inspection of primary stab tips can be made by first
removing the breaker and opening the shutters manually. This is
done by rotating the actuating lever that opens the shutter (See
Fig. 7-9). If it is necessary to perform work on the primary
disconnects, the shutter unit and the stab tip bracing must be
removed. To remove the shutter, remove the four screws in the
corners of the shutter and carefully remove shutter unit.
WARNING: Unless the proper precautions are taken, the
removal of a shutter unit presents the hazard of electrical
shock and burn. Do not remove the shutter unit unless the
equipment has been de-energized. Failure to do this can result
in serious injury.
ADVERTISSEMENT : A moins que les précautions nécessaires ne
soient prises, l’installation d’une unité à volet présente des
risques de choc électrique ou de brûlure. Il ne faut pas installer
l’unité à volet à moins que l’équipement ait été désamorcé.
L’omission de ce faire peut résulter en blessures sérieuses.
To remove these shutter units, proceed as follows:
1. The shutter is mounted by four screws on the horizontal stab
tip braces located at each side of the rear of the breaker
compartment. See Fig. 7-9.
2. Take out two slotted head screws on each side of the
frame and carefully remove the shutter unit.
3. Carefully remove the entire shutter frame.
4. The frame is then maneuvered forward past the racking
cams on each side, then upward and forward out of the
cassette.
1
Shutter
actuating
lever
Fig. 7-9 Envelope 1 &
Envelope 2 shutter assembly
2