Product Manual

2) Operation where:
• Excessive departure from rated voltage or frequency exceeding 10%
• Unbalanced Voltage between legs by more than 1%
3) Operation of speeds above the highest rated speed
4) Operation in a poorly ventilated room or an inclined position
5) Operation subjected to:
• Torsional impact loads
• Repetitive abnormal overloads
• Reversing or electric braking
Enclosure
• The enclosure for the motor should be chosen to protect it from the
expected operating environment
• See Chapter IV for Enclosure listings
Mounting
Motors are generally mounted horizontally with feet attached to the
floor, but other arrangements are common:
- wall mounted
- ceiling mounted
- pedestal mounted
- face mounted
- flange mounted
The size and length of the shaft can be specified if the standard shaft
types or materials are not suitable for the required mounting arrange-
ment or machine configuration
Insulation
- See Chapter V for table of Insulation Class information
- The type of insulation used in a motor depends on the operating
temperature that the motor will experience. Motors are specified by
ambient temperature and insulation class.
- Class A is an older classification. Class B is the standard for current
motor designs and class F and H are used in higher temperature
applications.
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