Disconnector

The circuit breaker is designed to an electrical switching apparatus, and ordinary knife switch difference is that it has a strong ability arc. The most common is the low-voltage circuit breakers "air switch", which uses air as the extinguishing medium, commonly used in household and industrial control. High voltage circuit breaker arc medium is divided into: compressed air, insulating oils, vacuum, sulfur hexafluoride. Its working principle is: When the switch arcing contact separation, the use of elongated arc, breaking the arc, as well as cross-blowing, blowing vertical, magnetic blow the arc is cooled, the arc a "go free" and eventually quickly extinguish the arc.
Breaker protection is configured, but the circuit breaker auxiliary equipment, low-voltage Circuit breaker with overcurrent tripping function generally, some of them with over-and undervoltage trip function. High voltage circuit breaker according to need with more protection devices, such as: speed off, overcurrent, distance, frequency, differential and so on.