Powell PowlVac ARG 4 Series, Инструкционный бюллетень

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17 Equipment Description
01.4IB.50023A
position. In all other positions of the
ground and test device, the pin on the
shutter rides on the surface of the cam and
blocks closing of the shutter which in turn
blocks closing of the grounding switch.
3. The manual trip paddle (Figure 1, m) may
be padlocked in the operated position,
ensuring that the grounding switch remains
open, or it may be padlocked in the
non-operated position, preventing the
opening of the grounding switch.
4. The shutters covering the test receptacles
may be padlocked or they may be
interlocked using key interlocks
(Figure 1, b) .
I. S
hutterS
In addition to moving the ground and test
device in and out of the connected position,
the crank arm rollers sliding in the slots in the
plates on the switchgear compartment operate
the shutters over the primary disconnects in
the compartment. Downward movement of
the rollers in the slots move the shutters before
there is any movement of the ground and test
device toward the connected position.
J. o
perAtInG
S
olenoIdS
1) Closing Coil
The closing coil (Figure 1, n) is located just
inside the lower front cover of the ground
and test device. It is attached to the lower
front cover by two screws, accessible from
the front of the ground and test device.
2) Shunt Trip Coil
When supplied, the shunt trip coil
(Figure 4, b)
is located to the left of the
mechanism to the rear of the ground and
test device.
h. I
nterlockInG
The ground and test device is provided with
numerous interlocks as standard features,
and many more can be added if required by a
specific user. The standard interlocks include:
1. The levering-in mechanism cannot be
operated unless the grounding switch is in
the open position. The window in the front
cover which gives access to the levering-in
shaft is covered by a shutter (Figure 1, d) .
When the manual trip paddle (Figure 1, m)
is in its normal position, a pin in this shutter
rests on a shutter interlock arm
(Figure 2, e) . Pushing in on the trip paddle
opens the grounding switch. This action
also causes the shutter interlock arm to
swing forward, allowing the levering-in
shutter to drop, exposing the levering-in
shaft. When the shutter is down, the pin
drops behind the shutter interlock arm,
holding the trip paddle in its operated
position and blocking closing of the
grounding switch. This ensures that
the device cannot be inserted into or
withdrawn from a switchgear cell unless the
grounding switch is open.
2. The levering-in shutter and the trip paddle
are further interlocked to block closing
of the grounding switch in any position
of the ground and test device other than
fully inserted into or fully withdrawn from
the compartment. The levering-in shaft
has a cam plate attached to it next to the
racking gear. This cam has two notches
in it. The back end of the shutter arm
has another pin, which must drop into
one of these notches in order to raise the
shutter and release the trip paddle. The
two notches are positioned so that the
pin on the shutter will enter one notch
when the ground and test device is in the
fully inserted position and the other notch
when the device is in the fully withdrawn