Contactors and Relays is a course designed to familiarize participants with the operation and use of magnetic contactors and relays. After completing this course, participants should be able to describe the operating principles of magnetic contactors and relays, and explain how both types of devices are used in electrical systems. They should also be able to describe the components and operation of low-voltage remote control switching systems.
Describe the operating principles of magnetic contactors.
Explain how mechanical contactors operate.
Describe the operating principles of contactors used as motor starters.
Explain how a motor starter operates.
Read wiring diagrams involving contactors.
Describe the operation of contactors in lighting circuits.
Read wiring diagrams involving lighting contactors.
Select protective enclosures to match the surrounding environment.
Describe the operating principles of relays.
Explain the functions of control relays in electrical systems.
Read wiring diagrams involving control relays.
Explain how solid-state relays operate.
Explain the functions of solid-state relays in electrical systems.
Read wiring diagrams involving solid-state relays.
Explain the functions of overload relays in motor circuits.
Describe the operation of thermal overload relays.
Troubleshoot contactor/relay problems.
List the advantages of low-voltage remote control switching.
Design and draw a wiring diagram of a simple remote control circuit.
Explain the operation of a low-voltage remote control switching system.
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