The mechanism of water tree formation in insulating liquids

Author

Auckland, D.W. ; Chandraker, K. ; Ahmudiarto, Yoyon ; Varlow, B.R.

Author_Institution

Dept. of Electr. Eng., Univ. of Manchester Inst. of Sci. & Technol., UK

fYear

1994

fDate

5-8 Jun 1994

Firstpage

410

Lastpage

413

Abstract

A new technique has been developed to study the growth of water trees. In this trees are grown around a high voltage conductor immersed in an insulating fluid and are observed using a video camera and time lapse recorder. It was found that the tree-like structures grow in a relatively short time if droplets of water or other liquid or solid particles are injected into the fluid. As in solid insulation tree growth depends on the presence of ions in the liquid, the frequency of the field applied to the conductor, the permittivity of the injected particles and the viscosity of the insulating fluid

Keywords

insulation testing; liquids; moisture; organic insulating materials; polymers; silicone insulation; trees (electrical); field frequency; fluid viscosity; high voltage conductor; injected particles permittivity; insulating liquids; ions; time lapse recorder; video camera; water tree formation; water tree growth; Dielectric liquids; Electrodes; Frequency; Methanol; Needles; Polymers; Solids; Trees - insulation; Viscosity; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on

Conference_Location

Pittsburgh, PA

ISSN

1089-084X

Print_ISBN

0-7803-1942-7

Type

conf

DOI

10.1109/ELINSL.1994.401482

Filename

401482