Rockwell Automation 1329R Vertical Mount, In-Line AC Motors - Manual (Page 4)

4 Vertical Solid Shaft Normal Thrust and In-Line AC Motors
• Where motors are not stored in the original containers, but are
removed and mounted on other pieces of machinery, the
mounting must be such that the drains and breathers are fully
operable. In this respect, the drains must be kept at the lowest
point in the motor and/or the drain plugs removed so that all
condensation can automatically drain out.
• All other storage conditions apply, including rotation of motor
shafts. Where such conditions cannot be met, the equipment must
be treated the same as if it were mounted in its normal position,
and all protective devices such as heaters, breathers. and drains
must be fully operable.
Installation Inspection
After the motor is unpacked, examine the nameplate data to see that it
agrees with the power circuit to which it will be connected. The motor
is guaranteed to operate successfully with frequency not more than
5% and voltage not more than 10% above or below the nameplate
data, or combined variation of voltage and frequency of not more than
10% above or below nameplate data. Efficiency, power factor and
current may vary from nameplate data.
If the motor is totally-enclosed, fan-cooled and equipped with
condensate drain plugs. The plugs must be removed to permit escape
of moisture. The drain plug is located on the flange bracket. Certain
motors are furnished with hex-head “T-Drains,” which should be left
in place. Some explosion-proof motors are equipped with
explosion-proof drains which must remain in place.
As shipped, the motor is ready for immediate service. If the motor has
been in storage for an extended period or has been subjected to
adverse moisture conditions, it is best to check the insulation
resistance of the stator winding with a megger or an insulation
resistance meter before initial starting.
If the insulation resistance is lower than that calculated from the
formula in the Maintenance section (see page 8), the winding should
be dried out in one of two ways:
1. Bake in an oven at a temperature not exceeding 90 degrees C (200
degrees F) until insulation resistance becomes constant. If this is
done, motor should be relubricated before reinstallation.
2. With rotor locked, apply low voltage and gradually increase
current through windings until temperature (measured with a
thermometer) reaches 90 degrees C (200 degrees F). Do not
exceed this temperature.