Powell FlexTrol Class E2, Instruction Bulletin

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01.4IB.46300
Equipment Description
FlexTrol
™
Class E2 Medium Voltage Controllers with
Eaton Contactor
Figure 6 Isolating Switch Operating Handle
a. ON Position
b. Padlock Provision (ON)
c. Padlock Provision (OFF)
d. OFF Position
a
b
c
d
The isolating switch operating handle has two
distinct positions described as follows:
1. The
ON
position (Figure 6, a) : The isolating
switch is in the
CLOSED
position, the high
voltage compartment door is interlocked
shut, and the controller may be energized.
2. The
OFF
position (Figure 6, d) : The
isolating switch is in the
OPEN
position,
the high voltage compartment door is
not interlocked shut, and the controller is
deenergized and grounded.
H. M
ecHanical
i
nterlocking
FlexTrol ™ is designed for the medium voltage
vacuum contactor to perform normal load
current interrupting. The power fuses are
designed to interrupt fault currents.
Note:
The manual isolator will not interrupt any
fault current.
FlexTrol is manufactured with several
built-in interlock provisions and safety
features to reduce hazards and provide proper
operating sequences:
• A mechanical interlock prevents opening
the medium voltage door with the switch
in the closed position. Ensure that the
medium voltage door is fully closed and
latched using the two latches on the right
side of the door to prevent damage to the
interlock bracket on the back of the door.
• An additional interlock prevents closing of
the switch unless the medium voltage door
is closed (Figure 21, a) . On controllers that
require two structures (reduced voltage
starters, for example), the door to the
second structure will also be interlocked
with the switch-operating mechanism.
The second door must be closed before the
main door is closed. Both doors must be
closed before the switch operator can be
moved to the closed position.
Note:
Attempting to close the switch with
the door open can cause damage to
the operating mechanism.
Mechanical and electrical interlocks are
provided to ensure that the non-load break
isolation switch cannot be opened or closed
unless the main contactor is deenergized
(Figure 21, e)
. Do not attempt to force the
switch-operating mechanism with the main
contactor closed. The handle mechanism is
designed to fail before the isolation switch can
be opened with the main contactor closed.
!
CAUTION
Applying excessive force to the switch handle
with the mechanical interlocks engaged will
result in damage to the switch.