High-voltage load switch: The high-voltage load switch acts as a card maker in the circuit. It is usually used in series with a fuse because it cannot react to short-circuit current. The combination of the two can replace the function of the circuit breaker, and it is not inferior to the circuit breaker from the perspective of function or economy. There are many pistons inside. These pistons rely on the rotation of the main shaft to drive the jet to extinguish the arc generated by mechanical means for the first time, so that the success rate of physical arc extinguishing is very high.

Isolating switch: The isolating switch does not have the characteristics of arc extinguishing, so it cannot cut off the short-circuit current. Its main function is not to cut off the circuit. Its main function is to isolate the circuits that have been cut off and prevent them from being closed again. If the first step of repair is to cut off the current, then the second step is to protect the circuit from breaking when it is repaired. Induction is regenerated between them to form an induction arc and cause a circuit path.