Title :
Short interval space charge and external circuit current measurements in LDPE film in high temperature region
Author :
Fukuma, Masumi ; Wadamori, Miho ; Nagao, Masayuki ; Kosaki, Masamitsu ; Fukunaga, Kaori ; Maeno, Takeshi
Author_Institution :
Matsue Nat. Coll. of Technol., Japan
Abstract :
The pulsed electroacoustic (PEA) method has been used to measure space charge phenomena in polymers. We have developed a new transient PEA system, and observed space charge profiles of low-density polyethylene (LDPE) films at 1 ms intervals during breakdown teats at various temperatures. In order to clarify the relationship between the space charge and external circuit current at intrinsic electrical breakdown of polymer insulating films, we have developed an external circuit current measuring unit for the transient PEA system. This paper shows space charge dynamics and external current observed during a short time breakdown test of a 100 μm thick LDPE film at 90 °C. The experiments revealed that positive charge injection is one of the most important factors affecting the intrinsic breakdown of LDPE in the high temperature region
Keywords :
acoustoelectric devices; charge injection; charge measurement; electric breakdown; electric current measurement; insulation testing; polyethylene insulation; polymer films; pulse measurement; space charge; 100 micron; 90 C; LDPE film; current measuring unit; external circuit current; intrinsic electrical breakdown; low-density polyethylene; positive charge injection; pulsed electroacoustic method; short time breakdown test; space charge dynamics; transient PEA system; Charge measurement; Circuits; Current measurement; Electric breakdown; Polyethylene; Polymer films; Pulse measurements; Pulsed electroacoustic methods; Space charge; Temperature;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973712
