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This course accepted in:

 

• Alabama (P.E.)

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Abbreviations:

AOP-Areas of Practice

LAR-Laws & Rules

P.E.-Professional Engineers

 

Explore all PDH CEU CPC CPD and Webinars for Engineers

Circuit Control Devices

Course No. E-3010

Credit: 3 PDH

Course Fee: $86.85 Purchase course

Subject Matter Expert: A. Bhatia, Mechanical Engineer

 

Overview

Circuit control in its simplest form, is the application and removal of power. This can also be expressed as turning a circuit on and off or opening and closing a circuit. Before you learn about the application of circuit control devices, you should know why circuit control is needed. If a circuit develops problems that could damage the equipment or endanger personnel, it should be possible to remove the power from that circuit. The circuit protection devices (fuses and breakers) are not the control devices; these are protection devices that will remove power automatically in event of overload conditions. 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, and covers the requirements for switches, relays and solenoids. The course is based entirely on Naval Education and Training Materials (NAVEDTRA 14175), Electricity and Electronic Training Series; Module-3 and covers Chapter 3 titled “Circuit Control Devices”.

The student must take a multiple-choice quiz consisting of fifteen (15) questions at the end of this course to obtain PDH credits.

 

Specific Knowledge or Skill Obtained

This course teaches the following specific knowledge and skills:

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

 

Course

Click on the following link to the PDF document to review the course material before taking the quiz for credit.

Circuit Control Devices

 

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