Rockwell Automation 1329M AC Induction Motors, 56-5000 Frame, User Manual - Manual (Page 6)

6 AC Induction Motors
1. All wiring, fusing, and grounding must comply with National
Electrical Codes and local codes.
2. To determine proper wiring, rotation and voltage connections,
refer to the information and diagram on the nameplate, separate
connection plate or decal. If the plate or decal has been removed,
contact manufacturer for assistance.
3. Use the proper size of line current protection and motor controls
as required by the National Electrical Code and local codes.
Recommended use is 125% of full load amps as shown on the
nameplate for motors with 40˚C ambient and a service factor over
1.0. Recommended use is 115% of full load amps as shown on
the nameplate for all other motors. Do not use protection with
larger capacities than recommended. Three phase motors must
have all three phases protected.
Thermal Protector Information
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.
The nameplate will indicate one of the following:
•
Motor is thermally protected,
• Motor is not thermally protected,
• Motor is provided with overheat protective device.
For examples, refer to the paragraphs below.
1. Motors equipped with built-in thermal protection have
“THERMALLY PROTECTED” stamped on the nameplate.
Thermal protectors open the motor circuit electrically when the
motor overheats or is overloaded. The protector cannot be reset
until the motor cools. If the protector is automatic, it will reset
itself. If the protector is manual, press the red button to reset.
2. Motors without thermal protection have nothing stamped on
nameplate about thermal protection.