The influence of the axial magnetic field upon the low voltage electric arc in vacuum

Author

Pavelescu, D. ; Dumitrescu, G. ; Nitu, S. ; Trusca, V. ; Pavelescu, D., Jr.

Author_Institution

Dept. of Electr. Eng., Bucharest Politehnica Univ., Romania

Volume

14

Issue

3

fYear

1999

fDate

7/1/1999 12:00:00 AM

Firstpage

948

Lastpage

953

Abstract

The investigation of the influence of an axial magnetic field upon the characteristics of the large power and low voltage vacuum arc is presented. The tests were provided by help of an experimental setup able to provide asymmetrical and reproducible short-circuit currents up to 54 kA_rms at 1360 V_rms. This current was interrupted in a monophase model of a vacuum switchgear, with the axial magnetic field generated by the interrupted current itself. Based on the experimental data, interesting results regarding the evolution of the arc voltage were achieved and original relationships for the evolution of the probability of breakdown failure, depending on the values of the current and axial magnetic field in the contact area were derived

Keywords

circuit-breaking arcs; magnetic fields; probability; short-circuit currents; vacuum arcs; vacuum switches; 1360 V; 54 kA; arc voltage evolution; axial magnetic field; breakdown failure probability; contact area; high power; interrupted current; low voltage electric arc; low voltage vacuum arc; monophase model; short-circuit currents; vacuum arc; vacuum switchgear; Circuits; Coils; Current measurement; Electric variables measurement; Electromagnetic measurements; Low voltage; Magnetic field measurement; Magnetic fields; Magnetic switching; Testing;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.772339

Filename

772339