Breakdown characteristics of gases mixed with tetrachloroethylene mist under nearly uniform fields

Author

Yashima, M. ; Fujinami, H. ; Takuma, T.

Author_Institution

CRIEPI, Tokyo, Japan

Volume

25

Issue

2

fYear

1990

fDate

4/1/1990 12:00:00 AM

Firstpage

371

Lastpage

379

Abstract

A description is given of the breakdown characteristics of N₂ or SF₆ gas mixed with tetrachloroethylene mist under nearly uniform fields. The effect of the mist on the flashover voltage of the gas was experimentally studied for various gas pressures and applied voltage waveforms. A significant increase in the flashover voltage was produced by introducing the mist into the gas in the case of an applied impulse voltage. However, the voltage increased slightly only at low gas pressures when DC and AC voltages were applied. The effect of an electric field on the behavior of the mist is also discussed. Possible mechanisms by which the presence of the mist may contribute to the increase of the flashover voltage are discussed, and the increase is attributed principally to the scarcity of initial electrons in the gas mixed with the mist

Keywords

composite insulating materials; gaseous insulation; impulse testing; nitrogen; sulphur compounds; AC voltages; DC voltages; N₂ gas; SF₆ gas; breakdown characteristics; electric field effect on mist; flashover voltage; gas pressures; impulse voltage; nearly uniform fields; scarcity of initial electrons; tetrachloroethylene mist; voltage waveforms; Cooling; Dielectric liquids; Dielectrics and electrical insulation; Electric breakdown; Flashover; Gas insulation; Gases; Power transformer insulation; Sulfur hexafluoride; Voltage;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.52387

Filename

52387