Powell FlexTrol Class E2, Instruction Bulletin

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22
01.4IB.46300
Installation
FlexTrol
™
Class E2 Medium Voltage Controllers with
Eaton Contactor
ii. OFF Position: When the
switch is in the
OFF
position
(Figure 6, d) , the isolating switch is in
the
OPEN
position, the high voltage
compartment door is shut, and
the controller is deenergized and
grounded.
iii. If the switch is in the ON position,
open the contactor contacts by
operating the electrical control
switch on the compartment front
door or other means as required
by the specific equipment
configuration. Once the contactor
primary contacts are open and
the contactor is deenergized, the
isolation switch handle may be
moved from the ON position to the
OFF position. With the isolation
switch handle in the OFF position
and the contactor primary contacts
open, the switchgear compartment
high voltage door may be opened
by lifting the latch handle and
pulling on the door.
b. Removing the Vacuum Contactor from
the Lower Compartment
i. Visually inspect the isolating switch
to ensure it is in the
OPEN
position
and that the insulating shutter
displays the
CLOSED
indicating
stripes.
ii. Confirm that the fuses are
deenergized.
iii. For 400A contactors, the fuses may
be removed using a fuse puller
for the clip-on style fuses or by
removing the bolts for the bolt-on
style fuses. For 800A contactors, the
fuses may be removed by removing
the bolts holding the fuses in place.
iv. Disconnect the secondary control
circuit plug from the left side of the
vacuum contactor and stow it so
that the cable will not be damaged.
v. Remove the bolt from the
hold-down bracket (Figure 3, j) .
vi. Unsnap pin collar from the interlock
rod clevis and remove pin.
vii. Remove bolts for contactor line and
load connections (bolt-in unit only).
viii. Carefully remove the contactor from
the compartment.
!
CAUTION
The contactor weighs in excess of 50 lbs. and
assistance may be required to safely remove
it from the compartment and transport
it. Failure to use caution when moving the
contactor may result in equipment damage
and/or personal injury.
ix. If the contactor is being replaced,
move the contactor interlock lever
to the new contactor.
x. Reverse the procedure to reinstall
the contactor.
xi. Adjust the contactor interlock rod
according to the Contactor Interlock
Rod Adjustment procedure found
in the most current version of Eaton
IB-48041.
Note:
Store the vacuum contactor in a safe
location to prevent damage to it while
it is outside of the compartment.