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Low Voltage Circuit Breaker Designing

Learn about the working principles of circuit breakers, their types, and specifications in this free online course.

Publisher: Er Sadiq Hussain
Learn about the basics of circuit breakers, the working principle of these electrical switches and their types, as well as different parts of miniature circuit breakers at your own pace in this free online course. You will find out about specifications and you will be taught how to calculate the size of an appropriate breaker. Enrol today to find out more about circuit breakers and how they are used in domestic, commercial and industry settings.
Low Voltage Circuit Breaker Designing
  • Duration

    1.5-3 Hours
  • Students

  • Accreditation






View course modules


In this free online course, you will learn about the working principle of electrical switches and protective devices known as circuit breakers. We will explain the fundamentals of a circuit breaker and teach you about the different types and their specifications. We will also show you how to select an appropriate size of these electrical switches as per the connected load. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. It will act like a normal switch under normal conditions which can be used to trip the circuit for the purpose of maintenance. The basic function of all circuit breakers is to interrupt heavy current flow after a fault is detected in an electrical circuit. Unlike a fuse, which operates once and then must be replaced, these electrical switches can be reset, either manually or automatically, to resume normal operation.

This short course will not only give you an idea of how to select an appropriate circuit breaker based on the type of electrical load, but you will also come to know the working principle of a miniature circuit breaker in detail. You will familiarize yourself with the size calculation of the circuit breaker as per National Electrical Codes (NEC) rule. Upon finishing this course, you will know the definition of the circuit breaker and the difference between short circuit and overload current. After explaining the technical specifications, the course will then move to arc extinction, where you will learn more about high and low resistance interruption. As you will find out, a suitable energy dissipating device must be incorporated in the design, as the arc can lead to the danger of fire or explosion. You will find out what arc consists of, what methods are used in the arc extinction process, what forms of protection may be employed to reduce the rate of erosion of contacts, and how the blast principle, where we use air, oil, gas, or water, works.

By the end of this course, you will be able to understand and design a circuit breaker for any low voltage electrical system projects and you will also have an idea of the correct way to make a selection. You will be amazed to find out how much information you can receive in a bite-size course like this one. To reinforce the information obtained in these topics, you will have the chance to test your knowledge by going through several questions before the final assessment. So, what are you waiting for? Start this course today, fuel your intellectual spark, and gain a greater understanding of circuit breakers in a short amount of time.

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