GE Industrial Solutions Entellisys Low Voltage Switchgear - Manuel (Page 45)

Entellisys Low Voltage Switchgear
45
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.
Installing and Removing Current
Transformers
WARNING: Do not operate any current transformer
with secondaries open-circuited. Be sure to short-
circuit secondary before moving a current
transformer.
AVERTISSEMENT: Tout transformateur de courant ne
doit pas être opéré avec les secondaires dans un état
de circuits ouverts. Assurez-vous de court-circuiter les
secondaires avant de bouger un transformateur de
courant.
Phase current transformers (CT's) in Entellisys Low
Voltage Switchgear are mounted on the stationary
primary disconnect studs in the breaker compartment.
Neutral current transformers, if present, are located in
the bus compartment or in the transition section.
Care must be exercised when installing or removing
phase current transformer mounting screws so as not to
strip the holes in the plastic base. Do not torque screws
over five in/lbs.
Removing EntelliGuard E 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. Breaker Position Barrel Indicator
2. Shutters
3. Shutter actuator
Fig. 7-10. Entellisys circuit breaker shutter unit
Installing an EntelliGuard E Shutter Unit (in a de-
energized cubicle)
Screws for
removing
shutter
assembly
Shutter
actuating
lever
Fig. 7-9 Envelope 1 & Envelope 2
shutter assembly
2
3
1