High-voltage fuse behaviour with varistor commutation

Author

Wolny, A. ; Stokes, A.D. ; Kacprzak, B.

Author_Institution

Sch. of Electr. Eng., Sydney Univ., NSW, Australia

Volume

141

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

33

Lastpage

37

Abstract

Expulsion fuse operation using parallel connected ZnO varistors for current commutation offers new protection opportunities for this simple switching element. The advantages of low cost and full-range protection can be retained with the addition of current limitation and hence almost unlimited breaking capacity. Pad-mounted and cubicle applications may also be possible. The relations among varistor voltage, fuse element cross-section, fault current, circuit conditions and energy dissipated during current breaking operation have been analysed. It has been found that maximum energy dissipated by a fuse-varistor arrangement depends on the fuse element cross-section and the varistor voltage; these parameters play crucial roles in fuse dimensioning

Keywords

commutation; electric fuses; overcurrent protection; power system protection; switchgear; switchgear testing; varistors; zinc compounds; HV fuses; ZnO; breaking capacity; current commutation; current limitation; dimensioning; energy dissipation; expulsion fuse; fault current; fuse element cross-section; power system protection; switching; varistors; voltage;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:19949777

Filename

277990