General Information 1
−
3
MN427
Receiving
Each Baldor
S
Reliance motor is thoroughly tested at the factory and carefully packaged for shipment.
When you receive your motor, there are several things you should do immediately.
1. Observe the condition of the shipping container and report any damage immediately to the
commercial carrier that delivered your motor.
2. Verify that the part number of the motor you received is the same as the part number listed on your
purchase order.
Handling
The motor should be lifted using the lifting lugs or eye bolts provided.
1. Use the lugs or eye bolts provided to lift the motor. Never attempt to lift the motor and additional
equipment connected to the motor by this method. The lugs or eye bolts provided are designed to lift
only the motor. Never lift the motor by the motor shaft or the hood of a WPII motor. If eye bolts are
used for lifting a motor, be sure they are securely tightened. The lifting direction should not exceed a
20
angle from the shank of the eye bolt. Excessive lifting angles can cause motor damage.
2. To avoid condensation inside the motor, do not unpack until the motor has reached room temperature.
(Room temperature is the temperature of the room in which it will be installed). The packing provides
insulation from temperature changes during transportation.
Storage
Storage requirements for motors and generators that will not be placed in service for at least six months
from date of shipment. Improper motor storage will result in seriously reduced reliability and failure.
An electric motor that does not experience regular usage while being exposed to normally humid
atmospheric conditions is likely to develop rust in the bearings or rust particles from surrounding surfaces
may contaminate the bearings. The electrical insulation may absorb an excessive amount of moisture
leading to the motor winding failure.
A wooden crate “shell” should be constructed to secure the motor during storage. This is similar to an
export box but the sides & top must be secured to the wooden base with lag bolts (not nailed as export
boxes are) to allow opening and closing many times without damage to the “shell”.
Minimum resistance of motor winding insulation is 5 Meg ohms or the calculated minimum, which ever is
greater. Minimum resistance is calculated as follows:
Rm = kV + 1
where: (Rm is minimum resistance to ground in Meg
−
Ohms and
kV is rated nameplate voltage defined as Kilo
−
Volts.)
Example: For a 480VAC rated motor Rm =1.48 meg
−
ohms (use 5 M
).
For a 4160VAC rated motor Rm = 5.16 meg
−
ohms.
Preparation for Storage
1. Some motors have a shipping brace attached to the shaft to prevent damage during transportation.
The shipping brace, if provided, must be removed and stored for future use. The brace must be
reinstalled to hold the shaft firmly in place against the bearing before the motor is moved.
2. Store in a clean, dry, protected warehouse where control is maintained as follows:
a. Shock or vibration must not exceed 2 mils maximum at 60 hertz, to prevent the bearings from
brinelling. If shock or vibration exceeds this limit vibration isolation pads must be used.
b. Storage temperatures of 10
C (50
F) to 49
C (120
F) must be maintained.
c. Relative humidity must not exceed 60%.
d. Motor space heaters (when present) are to be connected and energized whenever there is a
possibility that the storage ambient conditions will reach the dew point. Space heaters are
optional.
Note: Remove motor from containers when heaters are energized, reprotect if necessary.
3. Measure and record the resistance of the winding insulation (dielectric withstand) every 30 days of
storage.
a. If motor insulation resistance decreases below the minimum resistance, contact your Baldor
District office.
b. Place new desiccant inside the vapor bag and re
−
seal by taping it closed.
This Manual:http://www.manuallib.com/baldor/mn427-inverter-duty-pm-motors-manual.html