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. The actual breaking capacity of sf6 circuit breaker spring mechanism in the main circuit cannot reach the theoretical value due to quality problems of the contacts or arc extinguishing devices, which leads to arc burning 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 detachment and blocking, loose screws at the contact point, etc. 3. External reasons of the circuit: such as overload, excessive leakage value, etc.