Experimental investigation of surface flashover of PMMA, HDPE and PA in vacuum using 180 nanosecond quasi-square pulses

Author

Cheng, Xin-bing ; Liu, Jin-Liang ; Hong, Zhi-Qiang ; Qian, Bao-Liang

Author_Institution

Coll. of Opto-Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China

Volume

19

Issue

4

fYear

2012

fDate

8/1/2012 12:00:00 AM

Firstpage

1440

Lastpage

1447

Abstract

An experimental investigation of surface flashover characteristics in vacuum pressure of 1.3×10^-2 Pa (10^-4 Torr) was introduced by using a quasi-square pulse generated by an intense electron beam accelerator (IEBA) with duration of 180 ns and voltage of 180-300 kV, and the gap spacing length was varied from 100 to 210 mm. Polymethyl methacrylate (PMMA), High density Polyethylene plastics (HDPE) and Polyamide (PA) were chosen as the investigating insulator dielectrics in this paper. The effects of insulator material, applied voltage and gap spacing length on the surface flashover characteristics are presented. Meanwhile, the delay time, flashover current and impedance of the flashover channel are also discussed.

Keywords

flashover; polyethylene insulation; HDPE; PA; PMMA; applied voltage; delay time; flashover channel; flashover current; gap spacing length; high density polyethylene plastics; insulator dielectrics; insulator material; intense electron beam accelerator; polyamide; polymethyl methacrylate; quasisquare pulse; size 100 mm to 120 mm; surface flashover characteristics; time 180 ns; vacuum pressure; voltage 180 kV to 300 kV; Delay; Electrodes; Flashover; Insulators; Surface impedance; Surface waves; Switches; HDPE; PA; PMMA; Surface flashover; intense electron beam accelerator (IEBA); quasi-square wave;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2012.6260021

Filename

6260021