Multipulse lightning currents and metal-oxide arresters

Author

Darveniza, M. ; Tumma, L.R. ; Richter, B. ; Roby, D.A.

Author_Institution

Queensland Univ., Qld., Australia

Volume

12

Issue

3

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

1168

Lastpage

1175

Abstract

Multiple stroke lightning ground flashes can impose surges of exceptional severity on exposed distribution surge arresters. This paper describes a series of tests on metal-oxide (MO) arresters and varistors to study surface flashover mechanisms. The results show that the more likely causes of surface flashover were plasma generation, manufacturing defects of the varistor surface coating, dielectric properties of the surface coating and the electrode contact system. For multipulses, plasma enhancement and varistor surface coating were found to play a dominant role in surface flashover

Keywords

arresters; distribution networks; electrodes; flashover; lightning protection; power system protection; varistors; dielectric properties; electrode contact system; exposed distribution surge arresters; lightning ground flashes; manufacturing defects; metal-oxide arresters; multipulse lightning currents; plasma enhancement; plasma generation; surface flashover mechanisms; surges; varistor surface coating; Arresters; Coatings; Flashover; Lightning; Manufacturing; Plasma materials processing; Plasma properties; Surges; Testing; Varistors;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.636934

Filename

636934