Introduction
- Polyphase AC motor workings
- How its made
Rated Voltage
- Operating under/over rated voltage
- Unbalanced voltages
- Derating factors
Load and Current
- Calculating full load amps
- Choosing the correct motor
Frequency and Phase
- Rated frequency
- 3 phase AC power
- Full Load / Synchronous speed
Horsepower
- Estimating motor load
- Drive limitations
- Jack shafts and pillow bearings
Enclosures
- Open / Totally Enclosed
- NEC Classes
- Frame size
Insulation Class
- Motor insulation system
- Insulation life
- Insulation ratings
Bearings
- Antifriction bearings
- Number nomenclature
- Sealed and Shielded
Efficiency
- Calculating efficiency and power factor
- Causes of power loss
- Rebuilding high efficiency motors