Impulse breakdown delay in liquid dielectrics | Zendy

Jouya Jadidian | Zendy; Markus Zahn | Zendy; Nils Lavesson | Zendy; Ola Widlund | Zendy; Karl Borg | Zendy

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Impulse breakdown delay in liquid dielectrics

Author(s) -

Jouya Jadidian,

Markus Zahn,

Nils Lavesson,

Ola Widlund,

Karl Borg

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4716464

Subject(s) - impulse (physics) , amplitude , electrode , dielectric , electrical breakdown , materials science , voltage , breakdown voltage , liquid dielectric , mechanics , optics , optoelectronics , physics , electrical engineering , classical mechanics , engineering , quantum mechanics

Theoretical images of streamers, revealing the mechanisms behind impulse breakdown in liquid dielectrics, are presented. Streamers lead to electrical breakdown by forming paths, capable of carrying large current amplitudes between electrodes. Breakdown delays and terminal currents are calculated for various electrode geometries (40 μm needle and 6.35 mm sphere) and gap distances (up to 10 mm). Modeling results indicate that the breakdown in needle-needle electrodes requires higher impulse voltage amplitudes than in needle-sphere electrodes for the same gap distances. Streamers in needle-sphere geometries are about 50% thicker than streamers propagating in needle-needle geometries under similar impulse voltage amplitudes.ABB Corporate Research Center (Vasteras, Sweden)IEEE Dielectrics and Electrical Insulation Society (Fellowship

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