Abstract:
Abstract: SF6 circuit breaker is the use of high voltage SF6 gas to break the normal current or fault current when the arc light blowing circuit breaker. With good insulation performance and arc extinguishing ability, can effectively cut off normal or fault current to ensure the normal operation of the power system. It is widely used in power system substation operation. If SF6 circuit breaker can not be opened and closed normally when it fails, it will have a great impact on the safe and stable operation of power system. When SF6 low-pressure lockout signal is sent out by SF6 low-pressure lockout signal in substation, operation and maintenance personnel must take prompt and effective countermeasures. In this paper, combined with the actual case of effective treatment of SF6 low-pressure lockout alarm by operation and maintenance personnel in a 35kV substation, the troubleshooting method of SF6 low-pressure lockout alarm is analyzed.