1. Turn on and off the no-load and load current in the high-voltage circuit under normal conditions.
2. In the event of a system failure, it can cooperate with the protection device and the automatic device to quickly cut off the fault current and prevent the accident from expanding, thus ensuring the safe operation of the system.
In fact, a circuit breaker is a kind of switch. It differs from other common switches mainly in:
1. Applicable voltage level is high
2. Arc extinguishing medium and method, there are vacuum, less oil, more oil and sulfur hexafluoride, etc.
3. Strong arc-extinguishing ability and good effect.......