Influence of electrode material on pressure-rise due to arc in a closed chamber

This paper describes the phenomenon of internal pressure‐rise due to arcs ignited between metal rod electrodes in air. First, the internal pressure‐rises in a closed chamber due to arcs were measured at currents within the range of 1 to 12.5 kA. The rod electrodes were made of copper, iron, and alum...

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Bibliographic Details
Published in:Electrical engineering in Japan 2011-03, Vol.174 (4), p.9-18
Main Authors: Tanaka, Shin-Ichi, Miyagi, Tsukasa, Ohtaka, Toshiya, Iwata, Mikimasa, Amakawa, Tadashi, Goda, Yutaka
Format: Article
Language:English
Subjects:
air
Aluminum
arc
Chambers
copper
Electrical engineering
Electrode materials
Electrodes
Iron
On-line systems
Online
pressure
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Summary:This paper describes the phenomenon of internal pressure‐rise due to arcs ignited between metal rod electrodes in air. First, the internal pressure‐rises in a closed chamber due to arcs were measured at currents within the range of 1 to 12.5 kA. The rod electrodes were made of copper, iron, and aluminum, and were 20 mm in diameter. The measurements showed that the maximum pressure‐rise distinctly differed with each electrode material at the same total arc energy, namely, the maximum pressure‐rise was the highest in the case of the aluminum electrode and was the lowest in the case of the iron electrode. Next, to quantitatively verify this difference, the internal pressure‐rise was estimated, taking into account the energy balance in the closed chamber on each electrode material. It was found that the estimated pressure‐rise approximately agreed with the above experimental results by taking into consideration oxidation reactions of the electrodes, melting and vaporization of the electrodes, and radiation loss of the arcs under certain realistic assumptions. © 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 174(4): 9–18, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21071
ISSN:0424-7760
1520-6416
1520-6416
DOI:10.1002/eej.21071