Title: Unit 13 Outline
Course: HET 119 HVACR Electricity II > Section: HET 119 HVACR Electricity II

Unit 13 Outline

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Unit 13 Outline

1. Three Phase Motors
  - Operation of a Three Phase Motors
  - Type of Three Phase Motors
  - Type of Efficiency of a Three Phase Motor
  - Uses of a Three Phase Motor
2. Construction and Operation of Three Phase Motors
  - Parts of a Three Phase Motor
  - Power Source and Consumption of Power
  - Efficiency of Three Phase Motors
3. Motor Starters
  - Parts of a Motor Starter
  - Purpose of Motor Starters
4. Three Phase Motor Controls
  - Push Button Control
  - Reversing Control
  - Frequency Drive Control

Summary

- Motors come in many different varieties; however, they will be used for specific purposes
- Three phase motors do not need capacitors or relay to make it more efficient.
- There are no start windings in a three phase motor.
- Three phase motors have three primary windings that can be wired to be a WYE or Delta coil configuration.
- Delta windings are used for more capacity.
- Wye windings are used for higher voltage.
- All motors work by inductance of an magnetic field into a coil of wire
- Three phase motors are the most efficient motor because the power supply has three alternating power sources that are 120° out of phase of each other.
- Motor starters are used to send power to the motor and to protect the windings from higher current situation in the same control.

Review the vocabulary terms listed below and look up their definitions / descriptions before taking the Vocabulary Quiz.

Vocabulary

3 Phase

Delta

Wye

Service Factor

Power Factor

Motor Ratings