Analysis Of The Function Of The Main Shield Of Low Voltage Pole Mounted Circuit Breaker And The Principle Of Arc Protection

The metal vapor reacts with the decomposition products of SF6 gas in sf6 circuit breaker operating mechanism, combining to form fine powder with good insulation (hydrofluoride, sulfhydryl acid salt, etc.), which is deposited on the contact surface and severely corrodes the contact material, thereby sharply increasing the contact resistance and making the sealed contact of SF6 gas in sf6 circuit breaker spring mechanism unable to work reliably.