Rockwell Automation 1329R Vertical Mount, In-Line AC Motors - Manual (Page 6)

6 Vertical Solid Shaft Normal Thrust and In-Line AC Motors
Allowances should be made for shaft growth (due to thermal
expansion) to avoid potential problems with seals and/or bearings. All
motors with the thrust bearings located in the top will have some
degree of shaft growth. The following chart lists the expected amount
of growth for Allen-Bradley LP motors.
Shaft Growth
National Electrical Code
All motors & generators covered by this document should be installed
and protected in accordance with the National Electrical Code.
The user must select a motor starter and overcurrent protection
suitable for this motor and its application. Consult motor starter
application data as well as the National Electric Code and/or other
applicable local codes.
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.
Frame Size Growth mm (inches) Frame Size Growth mm (inches)
180 0.05 (0.002) 360 0.43 (0.017)
210 0.13 (0.005) 400 0.46 (0.018)
250 0.25 (0.010) 444/445 0.51 (0.020)
280 0.30 (0.012) 447/449 0.56 (0.022)
320 0.38 (0.015)
!
ATTENTION: The user is responsible for conforming with
the National Electrical Code and all other applicable local
codes. Wiring practices, grounding, disconnects and
overcurrent protection are of particular importance. Failure
to observe these precautions could result in severe bodily
injury or loss of life