What are the functions and working principles of circuit breakers? There are many products on the market, but there are not many manufacturers who can really explain this product clearly. Every household is using an air circuit breaker, which is actually a type of circuit breaker. So today, we will discuss with engineers from Weikewei about its functions and principles?

When a system failure occurs and the protection of the faulty component fails and its circuit breaker fails to operate and refuses to trip, the protection of the faulty component acts on the adjacent circuit breakers in this substation to trip. If conditions permit, channels can also be used to make the wiring of the remote circuit breakers trip simultaneously, which is called circuit breaker failure protection. This is the function and terminology explanation of circuit breakers.

Generally, after the phase current element for phase separation discrimination is activated, two sets of starting contacts are output, which are connected in series with external action protection contacts to start the failure protection when the line, bus tie or section circuit breaker fails.

Circuit breakers

Circuit breaker is a very basic low-voltage electrical device, which has overload, short circuit, and undervoltage protection functions, and has the ability to protect the circuit and power supply.

The usage and function of air switches and circuit breakers are similar! Just generally, circuit breakers are used in situations where the load is relatively small, while circuit breakers are generally used in situations where the load is relatively large!

According to the different arc extinguishing media used, circuit breakers include air circuit breakers (commonly known as air switches), vacuum circuit breakers, SF6 circuit breakers, oil circuit breakers, etc. Due to the voltage range of 220-380V and the use of air as the arc extinguishing medium for circuit breakers in civil building electrical design, they are referred to as air switches or circuit breakers. But for the power system, it is necessary to treat identification specifically.

And how to choose the right circuit breaker? After reading this article, I believe you will have a better understanding of this issue as well! For the selection of circuit breakers, Weikewei's engineers will use some face-to-face communication and more than 10 years of professional experience, so as to better solve the system design of circuit protection and the efficient performance of various operations for you.