Calculation method of gas‐pressure rising process in puffer chamber of high‐voltage SF6 circuit‐breaker

Calculation method of gas‐pressure rising process in puffer chamber of high‐voltage SF6 circuit‐breaker

Regarding a PTFE (polytetrafluoroethylene) nozzle ablation due to arc radiation exposure in SF6 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. Further...

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Veröffentlicht in:Electrical engineering in Japan 2021-06, Vol.214 (2), p.n/a
Hauptverfasser: Sato, Motohiro, Yokomizu, Yasunobu, Horinouchi, Katsuhiko, Nakamura, Yasunori, Yoshitomo, Yuji, Shimizu, Yoshinori
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Sprache:eng ; jpn
Schlagworte:
ablation
GCB
nozzle
pressure rise
PTFE
SF6 arc
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container_issue 2
container_start_page
container_title Electrical engineering in Japan
container_volume 214
creator Sato, Motohiro
Yokomizu, Yasunobu
Horinouchi, Katsuhiko
Nakamura, Yasunori
Yoshitomo, Yuji
Shimizu, Yoshinori
description Regarding a PTFE (polytetrafluoroethylene) nozzle ablation due to arc radiation exposure in SF6 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.
doi_str_mv 10.1002/eej.23291
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subjects ablation
GCB
nozzle
pressure rise
PTFE
SF6 arc
title Calculation method of gas‐pressure rising process in puffer chamber of high‐voltage SF6 circuit‐breaker
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