6:1
6: Service the Motor
DANGER
ONLY QUALIFIED ELECTRI-
CAL PERSONNEL FAMILIAR
WITH THE CONSTRUCTION
AND OPERATION OF THIS
EQUIPMENT AND THE HAZ-
ARDS INVOLVED SHOULD
INSTALL, ADJUST, OPER-
ATE, AND/OR SERVICE THIS
EQUIPMENT. READ AND UN-
DERSTAND THIS MANUAL
IN ITS ENTIRETY BEFORE
PROCEEDING. FAILURE TO
OBSERVE THESE PRECAU-
TIONS COULD RESULT IN
SEVERE BODILY INJURY OR
LOSS OF LIFE.
DANGER
EXERCISE EXTREME CARE
BECAUSE HAZARDOUS
VOLTAGE EXISTS. DISCON-
NECT MOTOR BEFORE
TOUCHING ANY INTERNAL
PART. FAILURE TO OB-
SERVE THIS PRECAUTION
COULD CAUSE SERIOUS IN-
JURY OR LOSS OF LIFE.
Establish Regular
Motor Maintenance
Program
A fundamental principle of
electrical maintenance is the
keeping the apparatus clean and
dry. This requires periodic
inspection of the motor, the
frequency depending on the type
of motor and the application.
Check the following at regular
intervals:
1.
Make sure the exterior is kept
dry and free of dust, grease,
oil, and dirt. Because HR2000
motors are enclosed, they
require little attention.
2.
Make sure terminal
connections, assembly
screws, bolts, and nuts are
tight.
3.
Make sure the motor is
securely bolted to minimize
vibration.
CAUTION
Disconnect all conductors be-
tween the motor and controller.
Insulation resistance measure-
ments will subject the controller
to destructive voltages. Failure
to observe this precaution
could result in damage to, or
destruction of, the equipment.
4.
With all motor wiring
disconnected from the
controller, periodically check
insulation resistance of motors
in service at approximately the
same temperature and
humidity conditions to
determine possible
deterioration of the insulation.
When these measurements
indicate a wide variation,
determine the cause.
5.
Recondition the motor if it has
been subjected to excessive
moisture; rewind or reinsulate
as necessary.
High horsepower HR2000 motors
have the patented PLS/Positive
Lubrication System developed and
tested by Reliance Electric to
provide positive motor bearing
protection. The PLS system
directs new grease to the bearing
while providing improved heat
transfer from the bearing.
Lubrication instructions are
provided with each motor.
Troubleshoot
the Motor
Perform Initial Motor Checks
Make the following checks if
trouble develops when operating
the motor:
1.
Check that the bearings are in
normal condition.
2.
Make sure there is no
mechanical misadjustment or
binding to prevent free rotation
of moving motor parts.
3.
Make sure all bolts and nuts
are properly tightened.
4.
Make sure that motor
installation instructions have
been carefully carried out.
5.
Make sure the motor is
properly wired to the controller
(Figure 3-12).
6.
Check that low voltage
devices in control equipment
or other protective devices are
in proper working order.
7.
Check that no excessive
overload exists on the motor.
Disassemble the Motor
Note:
Reliance Electric cannot be
held responsible for expense
incurred in any repairs performed
by other than Reliance Engineers
or Authorized Service Stations
unless authorization has been
granted by Reliance Field
Representatives or the factory at
Cleveland, Ohio.
Note:
Reassembly of the motor
requires realignment of the
encoder in its housing. Encoder
alignment is critical for successful
drive operation. Realignment can
only be done with the use of the
Encoder Tester Kit (M/N 3RE5)
available from Reliance. See Table
7-5.
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