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Calculation method of gas‐pressure rising process in puffer chamber of high‐voltage SF 6 circuit‐breaker
Author(s) -
Sato Motohiro,
Yokomizu Yasunobu,
Horinouchi Katsuhiko,
Nakamura Yasunori,
Yoshitomo Yuji,
Shimizu Yoshinori
Publication year - 2021
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23291
Subject(s) - circuit breaker , nozzle , mechanics , radius , materials science , current (fluid) , voltage , chamber pressure , arc (geometry) , power (physics) , gas pressure , high voltage , electrical engineering , mechanical engineering , engineering , thermodynamics , physics , computer science , petroleum engineering , computer security
Regarding a PTFE (polytetrafluoroethylene) nozzle ablation due to arc radiation exposure in SF 6 circuit‐breaker, the ablated mass of the nozzle was formulated as a function of an arc current and an internal radius of the nozzle surface considering the radiation power absorbed on the surface. Furthermore, this formulation contributed to subsequent development of calculation method for evaluating gas pressure rise process during current interruption. And, verification experiments of the calculation method were performed with a model SF6 circuit‐breaker equipped a puffer chamber. Calculation results derived from the developed calculation method showed good agreement with measured gas pressure rise process. On the basis of the verified results, a discussion was made to explain pressure rise mechanism.