Analysis and Treatment of Sulfur Hexafluoride Leakage Fault in 500 kV Circuit Breaker
High-voltage circuit breakers and GIS equipment mostly use sulfur hexafluoride gas as arc extinguishing insulating medium.SF6 leakage causes harm to personal safety and environment.For a 500 kV circuit breaker SF6 leakage fault,specific de-tection methods and empirical formulas were used to infer the SF6 leakage fault point and fault extent.Combined with the circuit breaker disassembly inspection,it was judged that the fault was caused by the unreasonable design of the basin insulator seal,the rough installation process,and the large vibration of the circuit breaker mechanism side when the switch is opened and closed.Reasonable countermeasures were taken to successfully eliminate the fault.This article provides empirical guidance for future product design,installation processes and similar troubleshooting.
sulfur hexafluorideleak500 kV circuit breakerbasin-type insulatorbeattie-bridgeman equation of state
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