Fuses and Circuit Breakers

Fuses and Circuit Breakers

Updated Jan 21, 2021

 After finishing this lesson, you will be able to explain the design and function of commonly used fuses and circuit breakers, and how to test and protect them. • Identify some applications that employ fuses • Compare the operation of plug fuses to cartridge fuses • Discuss factors to consider before replacing a fuse • Explain the general function of a circuit breaker • Identify three methods of extinguishing an arc in an air circuit breaker • List commonly used types of circuit breakers and compare their operation