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24
Installation
01.4IB.50023A
PowlVac® Electrically Operated 15kV Ground and Test
per Long Island Railroad Specifications
24
c. Insert the racking handle onto the hex
shaft and rotate the handle clockwise.
When the device is being inserted into
the compartment, the force needed
to rotate the handle will be low at the
beginning of motion when movement
of the crank arms is only opening the
shutters; however, as the device moves
into the compartment, the device
primary disconnecting devices will
engage the fixed stabs located in the
compartment and the force required
to rotate the handle will increase
appreciably. This is normal and as soon
as the contacts are fully engaged the
force will decrease. Further rotation
of the handle will cause the device to
move further into the compartment
ensuring wipe or overlap of the primary
disconnecting devices and continues
until a positive stop is reached.
Do NOT attempt to rotate the handle
clockwise further or damage to the
mechanism may occur.
!
CAUTION
d. Once the device has reached the
“CONNECTED” position, remove the
racking handle and pull up on the
levering-in shutter, returning it to its
normal closed position. The trip paddle
will be released by this action and will
return to its normal position.
The maximum force required on the
racking handle for normal insertion
of the ground and test device will not
exceed 35 ft-lbs. Excessive force may
damage the device or the switchgear.
3) Moving the Ground and Test Device from
the Connected Position to the Disconnected
Position
Perform the following to rack the ground
and test device from the “CONNECTED”
position to the “DISCONNECTED” position:
a. Ensure the grounding switch is in the
Open position.
b. Push the manual push to trip paddle in
and insert the racking handle.
c. Rotate the handle counter-clockwise
until a positive stop is reached.
Do NOT attempt to rotate the handle
counter-clockwise any further or damage to
the mechanism may occur.
!
CAUTION
d. Once the device has reached the
“DISCONNECTED” position, remove
the racking handle and pull up on the
levering-in shutter, returning it to its
normal closed position. The manual
push to trip paddle will be released by
this action and will return to its normal
position.
4) Removing the Ground and Test Device from
the Upper Switchgear Compartment
Refer to 01.4IB.51000D for the detailed
procedure for removing a circuit breaker
from the upper compartment and follow
the same procedures to remove a ground
and test device.
