Circuit Control Devices

In Circuit Control Devices , you'll learn ...

• Why circuit control devices are needed
• The function, application and classifications of various types of switches
• How a solenoid works and what it is used for
• The operating principle of relays and contactors

Overview

Preview a portion of this course before purchasing it.

Credit: 3 CPD

Length: 40 pages

Circuit control in its simplest form, is the application and removal of power. Circuit control devices allow you to turn the device ON when it is needed and OFF when it is not needed.

There are three type of common circuit control devices; switches, relays and solenoids.

A switch, in simple terms, contains two metal pieces called contacts that touch to make a circuit and separate to break the circuit. Switches can be classified according to the arrangement of their contacts.

Relays are protective, or control, devices, which complete or break an electrical circuit in response to electrical changes in an external circuit.

Solenoids consist of one or more coils surrounding an iron core. The coil(s) and the core are moveable in relation to each other. The axial or rotary movement is a result of the magnetic flux of the coil. It is designed to convert electrical energy into mechanical energy.

This 3-hour course provides general requirements, classifications, installation, maintenance, testing, and application information for circuit control devices.

Learning Objectives

Upon completion of this course, participants will be able to:

• Analyze reasons for providing circuit control devices.
• Explain Three general types of circuit control devices.
• Describe schematic symbols for a switch, solenoid and relay.
• Differentiate difference between a manual and an automatic switch and the reason why multi-contact switches are used.
• Identify type of switch used to prevent the accidental energizing or de-energizing of circuit.
• Assess meaning of the current and voltage rating of a switch.
• Verify operating principle of a solenoid and how to check a solenoid for proper operation.
• Interpret operating principle of a relay and how it differs from a solenoid.

Certificate of Completion

You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 15 questions. CPD credits are not awarded until the course is completed and quiz is passed.