The use of high-voltage circuit breakers

The high voltage circuit breaker plays a role in the control of the high voltage circuit and is one of the important electrical components in the high voltage circuit. The circuit breaker is used to turn on or off the circuit during normal operation, and the fault condition quickly disconnects the circuit under the action of the relay protection device, and the short circuit current is reliably connected under special conditions (such as when automatically reconnecting to the faulty line). High-voltage circuit breakers are special appliances that turn high-voltage circuits on or off under normal or fault conditions.

The operating state of the circuit breaker (open or closed) is controlled by his operating mechanism.

Differences between high-voltage load switches, high-voltage disconnectors and high-voltage circuit breakers:

1. The high-voltage load switch is capable of breaking with a load and has a self-extinguishing function, but its breaking capacity is very small and very limited.

2. The high-voltage isolation switch is generally not capable of breaking with a load. There is no arc extinguishing cover in the structure, and there is also a high-voltage isolation switch capable of breaking the load. However, the structure is different from the load switch and is relatively simple.

3, high-voltage load switch and high-voltage isolation switch, can form a clear disconnection point, most high-voltage circuit breakers do not have isolation function, there are a few high-voltage circuit breakers with isolation function.

4. The high-voltage isolation switch does not have the protection function. The protection of the high-voltage load switch is generally added with fuse protection, and only the quick-break and over-current.

5. The breaking capacity of high-voltage circuit breakers can be made high during the manufacturing process. Mainly rely on adding current transformer with secondary equipment to protect. Can have short circuit protection, overload protection, leakage protection and other functions.