A study of water tree suppression in polymeric insulating materials

Author

Sekii, Ysauo ; Momose, Norifusa ; Takator, Kazuyuki ; Goto, Tadao

Author_Institution

Chiba Inst. of Technol., Narashino, Japan

Volume

1

fYear

2000

fDate

2000

Firstpage

347

Abstract

To study the water tree suppression in polymeric insulating materials, experiments were conducted on LDPE and XLPE specimens applying voltage stress of 3kV/mm for up to 1000 hours in copper sulfate solution and sodium chloride solution. The results demonstrate that XLPE specimens containing lipophilic surfactants with HLB value smaller than 6.5 show a significant effect of water tree suppression. Taking the results of the experiments into consideration, the mechanism of water tree suppression was examined. It was presumed that the surfactant molecules in LDPE or XLPE insulation might form micelles and accept excess moisture in hydrophobic polymeric material, resulting in the suppression of water tree generation

Keywords

XLPE insulation; colloids; insulation testing; moisture; polyethylene insulation; power cable insulation; surfactants; trees (electrical); 0 to 1000 h; HLB value; LDPE; XLPE; hydrophobic polymeric material; lipophilic surfactants; micelles; moisture; polymeric insulating materials; voltage stress; water tree suppression; Cables; Conducting materials; Plastic insulation; Polymers; Rough surfaces; Slabs; Surface roughness; Testing; Trees - insulation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2000 Annual Report Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-6413-9

Type

conf

DOI

10.1109/CEIDP.2000.885297

Filename

885297