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Basic Functions of AC Motor Controllers
(Duration: 2:00:00)
Price: $55.00
Course Code:
IHRDC_OM_AEEA1
Course Catalog(s):
Course Provider:
IHRDC
Subscription Period [?]:
12 months
Description:
This interactive training unit is designed to familiarize trainees with the basic functions and operation of AC motor controllers. After completing this unit, trainees should be able to explain how an AC motor controller operates and describe the operation of master switches and pilot devices that can be used with AC motor controllers. They should also be able to explain how an AC motor can provide overload protection and low voltage protection, and to describe the operation of special types of AC motor controllers.

Objectives:

  • Introduction
    • Describe how a manual controller can be used to control a motor.
    • Describe how a magnetic controller can be used to control a motor.
    • Describe the parts and operation of a typical magnetic contactor.
    • Describe the operation of a magnetic contactor in a typical AC motor controller.
    • Describe the operation of maintaining master switches and momentary master switches.
    • Describe the operation of float switches, pressure switches, limit switches, and flow switches.
    • Describe the operation of bellows thermostats and bimetallic strip thermostats.
    • Explain how a mercury switch can be used in a pilot device.
  • Protective Devices
    • State the purpose of overload devices.
    • Describe the parts and operation of two types of thermal overload devices.
    • Describe the parts and operation of a typical magnetic overload device.
    • State the purpose of low voltage protection in a magnetic motor controller.
    • Describe the operation of an LVP and an LVR motor controller.
    • Explain how a low voltage relay operates.
  • Special Motor Controllers
    • Explain how a reduced voltage start motor controller provides protection to motors when they are first started.
    • Describe the operation of a two-speed and a reversible motor controller.
Sections:
  • Introduction
  •   - Basic Principles
  •   - Contactors
  •   - Master Switches and Pilot Devices
  • Protective Devices
  •   - Overload Protection
  •   - Low Voltage Protection
  • Special Motor Controllers
  •   - Reduced Voltage Start
  •   - Two-Speed
  •   - Reversible
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