Analysis On The Cause Of Burnout Of Main Circuit Of Sf6 Circuit Breaker Operating Mechanism

sf6 circuit breaker operating mechanism Generally, there are several reasons for burnout: 1.sf6 circuit breaker spring mechanism Because of the quality problems of contacts or arc extinguishing devices, the actual breaking capacity cannot reach the theoretical value, and the arc burns when a short circuit occurs. 2. The busbar of the intelligent frame circuit breaker has poor contact conductivity, which is often caused by unclean contact surface, too small contact surface, insufficient contact pressure, contact shedding and blocking, loose screws at the contact, etc. 3. External reasons of the circuit: such as overload, excessive leakage value, etc.