Studies on the dielectric strength of transformer oil under oscillatory impulse voltages

Author

Venkataseshaiah, C. ; Sarathi, R. ; Aleyas, M.V.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Madras, India

Volume

2

fYear

1996

fDate

16-19 Jun 1996

Firstpage

554

Abstract

In this paper, the results of investigations carried out on the breakdown characteristics of transformer oil subjected to oscillatory impulse voltage (unidirectional and bidirectional) stresses in the frequency range of 10-100 kHz using a needle-plane electrode configuration are presented. For the purpose of comparison, experimental results obtained under AC, lightning and switching impulse voltages are also provided. The effect of gap spacing, frequency, field nonuniformity and polarity on the breakdown characteristics are discussed

Keywords

electric breakdown; electric strength; impulse testing; insulation testing; power transformer insulation; power transformer testing; transformer oil; 10 to 100 kHz; AC impulse voltage; bidirectional stress; breakdown characteristics; dielectric strength; field nonuniformity; frequency; gap spacing; insulation breakdown testing; lightning impulse voltage; needle-plane electrode; oscillatory impulse voltages; polarity; switching impulse voltage; transformer oil testing; unidirectional stress; Breakdown voltage; Dielectric breakdown; Electric breakdown; Electrodes; Frequency; Lightning; Oil insulation; Petroleum; Power transformer insulation; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on

Conference_Location

Montreal, Que.

ISSN

1089-084X

Print_ISBN

0-7803-3531-7

Type

conf

DOI

10.1109/ELINSL.1996.549405

Filename

549405