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Impulse partial discharge and breakdown characteristics of rod–plane gaps in air and N 2 gases
Author(s) -
Saitoh Hitoshi,
Morita Keiichi,
Kikkawa Takashi,
Hayakawa Naoki,
Okubo Hitoshi
Publication year - 2004
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.10277
Subject(s) - partial discharge , switchgear , impulse (physics) , breakdown voltage , voltage , materials science , electric field , air gap (plumbing) , electrical engineering , sulfur hexafluoride , mechanics , analytical chemistry (journal) , environmental science , engineering , chemistry , physics , composite material , organic chemistry , chromatography , quantum mechanics
In response to growing environmental concerns, we attempted to develop switchgear without using SF 6 gas. In our research, we used compressed air and pure N 2 as an electrical insulation gas, because of their low global warming potential. In this paper, we examined the impulse breakdown and impulse partial discharge characteristics under various conditions related to nonuniformity of the electric field. The experimental results show that the breakdown voltage (BDV) of air is higher than that of pure N 2 gas under highly nonuniform field conditions in the rod–plane gap. On the other hand, the discharge inception voltage of air and N 2 were almost the same. Furthermore, first partial discharge (PD), leader discharge, and its transition to the breakdown were successfully observed through the measurement of discharge current and light emissions under impulse voltage application. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(3): 36–43, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10277