Powell FlexTrol Class E2, Instruction Bulletin

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FlexTrol
™
Class E2 Medium Voltage Controllers with
Eaton Contactor
Powered by Safety
®
38
01.4IB.46300
Operation
d. Verify that the mechanical interlocks
between the contactor and handle
mechanism are connected and
functioning properly.
e. The switch drive rod connection
(Figure 21, b) and the contactor interlock
rod connections (Figure 21, e) should
be verified by operating the handle
mechanism, open-to-close-to-open.
The door interlock plunger
(Figure 21, a) must be held in by hand
during this operation.
f. Verify that the pivot arm
(Figure 21, c) on the handle mechanism
drops down and makes contact with
the cam (Figure 21, d) after the handle is
fully closed.
Note:
Failure to contact the cam may
indicate a problem with the
adjustment of the aluminum interlock
arm on the contactor.
g. Close the main contactor with test
power and attempt to operate the
switch while holding the door interlock
plunger in (Figure 21, a) . The mechanical
interlock should prevent the switch
from operating.
h. Avoid putting excessive force on the
operating handle during this operation
or damage to the handle mechanism
may occur.
Figure 21 Mechanical Interlock Verification
a
c
d
b
e
a. Medium Voltage Door
Interlock Plunger
b. Switch Drive Rod
c. Pivot Arm
d. Cam
e. Contactor Interlock Rod
c. t
est
p
ower
c
ircuit
The procedures in this section describe how
to manually check the operating condition of
FlexTrol ™ without energizing the motor.
A complete operational check of the controller
can be made without applying voltage to the
motor or to the bus as follows:
1. The isolating-device handle must be in the
OFF
position. In the
OFF
position, contacts
of the mechanically operated test-power
interlock will open the secondary circuit
of the control-power transformer, thereby
isolating it.