The effects of polypropylene on the impulse breakdown mechanism of the laminated oil-impregnated PPLP

Author

Saitoh, Kazuo ; Kawakami, Yohji ; Murata, Masao

Author_Institution

Nagaoka Univ. of Technol., Niigata, Japan

fYear

1992

Firstpage

242

Lastpage

247

Abstract

The impulse breakdown mechanism of PPLP (polypropylene laminated paper) is investigated in detail, taking into consideration the effect of PP (polypropylene) film. It is found that, although both positive and negative streamers affect the impulse breakdown mechanism, each effect is very different. That is, the positive charges are trapped on the surface of PP film easily, while the negative charges tend to spread into the insulating material. Consequently, it is suggested that the most essential factor of the impulse breakdown mechanism is the positive charges. Comparison of a sheet of PPLP and a specimen made of Kraft papers and PP film suggests the importance of the effect of oil thin films between Kraft paper and PP film

Keywords

composite insulating materials; electric breakdown of solids; electric strength; impulse testing; insulating oils; insulation testing; laminates; paper; partial discharges; polymer films; Kraft papers; breakdown strength; effect of oil thin films; effects of polypropylene; impulse breakdown mechanism; laminated oil-impregnated PPLP; negative charges; negative streamers; polypropylene laminated paper; positive charges; positive streamers; Cable insulation; Cables; Dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Oil insulation; Paper technology; Transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-0565-5

Type

conf

DOI

10.1109/CEIDP.1992.283181

Filename

283181