TM 9-4910-663-12
Operation of Test Stand Drive.
a.
Use of this equipment involves high voltages.
Care must be used to avoid contact with conducting
parts. Failure to observe this warning may prove
fatal.
Use of this equipment involves rotating parts. Be
certain that all rotating components are secured.
Failure to observe this warning may prove fatal.
CAUTION
Always be certain rotation is correct for equip-
ment being tested to avoid serious damage.
NOTE
For hookup of a system under test refer to its
pertinent step and figure per the index.
(1) Position all switches and controls as specified in table
(2) Open the high voltage compartment door (5, fig 4-3) and
position reversing switch (S1, fig 2-5) to the UP position for coun-
terclockwise rotation or to the DOWN position for clockwise rotation
as determined by the rotation of the equipment to be mounted.
(3) Position circuit breaker switch (CB1, fig 2-5) to the ON
position.
(4) Close the high voltage compartment door (5, fig 4-3).
(5) Press START pushbutton switch (S3, fig 2-4) and hold for not
more than 30 seconds to allow time for the load bank airflow switch to
activate and keep the starter energized.
CAUTION
Repeated starting at frequent short intervals may
damage the drive magnetic starter coil (MS1, fig
2-5). This coil is
rated at 57
volts ac to
allow
start closure without chatter when starting from a
power source which drops sharply upon application
of initial motor load.
2-28
Change 1