A new optical method for physical characterization of water trees in polyethylene

Author

Viard, Jerome

Author_Institution

IFM, Univ. Joseph Fourier, Grenoble, France

fYear

1992

fDate

7-10 Jun 1992

Firstpage

95

Lastpage

98

Abstract

To understand the influence of water treeing on the dielectric strength of polyethylene, an investigation of all the physically relevant parameters of the water tree (WT) controlling the inception of electrical breakdown is necessary. Usually only the water tree length is taken into account. The author proposes that the optical absorbance of the water tree, which is correlated with the water concentration, be measured. The principle of this method is explained, and it is shown that the optical absorbance of the water tree is related to the initiation of electrical trees in its vicinity in polyethylene samples

Keywords

electric breakdown of solids; electric strength; insulation testing; light absorption; organic insulating materials; polymers; LDPE; dielectric strength; electric breakdown inception; electrical testing; optical absorbance; physical characterization; polyethylene; water concentration; water tree length; water treeing; Dielectric breakdown; Needles; Optical attenuators; Optical refraction; Optical scattering; Optical variables control; Polyethylene; Steel; Trees - insulation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, Conference Record of the 1992 IEEE International Symposium on

Conference_Location

Baltimore, MD

ISSN

1089-084X

Print_ISBN

0-7803-0649-X

Type

conf

DOI

10.1109/ELINSL.1992.247043

Filename

247043