Rockwell Automation 1329R Std. Industrial AC Induction Motors - Manual (Page 9)

Standard Industrial AC Induction Motors 9
Wiring
Connect the motor to the power supply according to the diagram on
the motor nameplate. For most 230/460 volt motors, nine leads are
brought out from the stator windings so that the motor may be
connected for either 230 or 460 volts.
Important: When motors are provided with thermal protection
(typically thermostats), it is important to properly connect
and apply the devices. This will ensure that the motor is
properly protected from being operated if thermal limits
are reached and/or exceeded. The control system must be
configured to reduce the motor load and/or shut down the
motor control system to allow the motor to cool to a level
within acceptable operating ranges. If the motor is
operated with the thermal protective devices tripped
(indicating an over temperature condition), the motor
insulation could be damaged and complete failure of the
motor insulation is possible. In the event of motor failure
due to an over temperature condition, Rockwell
Automation requires that motor thermal protective devices
(when supplied) be adequately monitored and
incorporated into the motor control system to maintain
warranty. Failure on the part of the individual installing
this equipment to take these steps will result in the factory
warranty being voided.
Grounding
In the USA consult the National Electrical Code, Article 430 for
information on grounding of motors, Article 445 for grounding of
generators, and Article 250 for general information on grounding. In
making the ground connection, the installer should make certain that
there is a solid and permanent metallic connection between the
ground point, the motor or generator terminal housing, and the motor
or generator frame. In other locations consult the appropriate national
or local code applicable.
!
ATTENTION: The user is responsible for conforming with
the National Electrical code and other applicable local
codes. Wiring practices, grounding disconnects and
overcurrent protection are of particular importance. Failure
to observe these precautions could result in personal injury
or loss of life.
!
ATTENTION: The following steps require rotating parts
and/or electrical circuits to be exposed. Stay clear if unit
must be running or disconnect and lockout power source if
contact must be made.