With the development of urbanization, more and more people are paying attention to home decoration work, especially in the field of water and electricity. This will involve wire electricians, and commonly heard are circuit breakers. Circuit breakers refer to switching devices that can switch, carry, and break current in normal circuit conditions, and can disconnect current in abnormal circuits within a specified time. They can also be used to distribute electrical energy, Start asynchronous motors infrequently to protect power lines and motors. When they experience severe overload, short circuit, undervoltage, and other faults, they can automatically cut off the circuit. Their function is equivalent to a combination of fuse switches and overcurrent/undervoltage relays. They are generally composed of contact systems, arc extinguishing systems, operating mechanisms, releases, shells, etc

Testing items for circuit breakers:

Vacuum degree, performance testing, high and low temperature resistance, combustion performance, contact pressure, mechanical characteristics, aging test, dielectric test, corrosion test, explosion-proof test, flammability test, service life, etc