Open AccessA potential fault of circuit breaker found using SF6 decomposition products detection
Author(s) -
Lei Fu,
Yanling Guan,
Liang Zhang,
Dewen Zhang,
Han Wang,
Jingyuan Chi,
Bing Wei
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2246/1/012004
Subject(s) - circuit breaker , arc fault circuit interrupter , fault (geology) , decomposition , sulfur hexafluoride , materials science , fuse (electrical) , engineering , short circuit , chemistry , electrical engineering , voltage , organic chemistry , seismology , geology
A 126kV circuit breaker was found to have latent fault by SF 6 decomposition product detection method. It was found that the sulfur hexafluoride gas decomposition products of the circuit breaker contained a large amount of CO gas, a certain amount of SO 2 and H 2 S, and a small amount of HF gas. The characteristic components and their contents of the decomposition products were analyzed, it is preliminarily concluded that there is insulation material fault in the circuit breaker, and the potential fault is further confirmed by the disassembly inspection that the MoS 2 lithium base grease is overcoated at the metal tie rod joint.