Space charge dynamics in LDPE films immediately before breakdown

Author

Fukuma, M. ; Fukunaga, K. ; Maeno, T.

Author_Institution

Matsue Nat. Coll. of Technol., Japan

Volume

8

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

304

Lastpage

306

Abstract

Space charge dynamics in low-density polyethylene (LDPE) films were observed by the pulsed electroacoustic (PEA) method during breakdown tests at various temperatures. In order to investigate the intrinsic electrical breakdown, the applied electric field was increased to 300 kV/mm in 150 ms, and kept constant until breakdown of the specimens, or 300 ms at the longest. Space charge profiles were measured at 1 ms intervals. A significant positive charge propagating into the sample was observed only immediately before the breakdown at 90°C. These measurements revealed that the positive charge behavior is strongly related to the breakdown phenomena

Keywords

ageing; electric breakdown; polyethylene insulation; polymer films; space charge; 150 to 300 ms; 90 degC; LDPE films; applied electric field; breakdown tests; intrinsic electrical breakdown; low-density polyethylene; positive charge behavior; pulsed electroacoustic method; space charge dynamics; space charge profiles; Charge measurement; Current measurement; Electric breakdown; Plastic films; Polyethylene; Pulsed electroacoustic methods; Space charge; Temperature; Testing; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.919963

Filename

919963