The characteristic features of recovery of the breakdown strength of vacuum switching devices after interruption of high currents

Author

Schade, E. ; Dullni, E.

Author_Institution

ABB Corp. Res. Ltd., Baden-Daettwil, Switzerland

Volume

2

fYear

2000

fDate

2000

Firstpage

367

Abstract

The relevant effects determining the recovery period are discussed. Metal vapor and residual charge at early times after current extinction reduce the breakdown strength. Metal droplets play only a secondary role obviously. The drawing of liquid protrusion out of the molten contact surfaces will be a mechanism in case of high field strength at the contact surfaces. The knowledge about the breakdown processes has to be improved, especially concerning the effect of delayed breakdowns

Keywords

circuit-breaking arcs; electric strength; power distribution protection; switchgear testing; vacuum arcs; vacuum interrupters; breakdown processes; breakdown strength; breakdown strength recovery characteristics; current extinction; high currents interruption; metal droplets; metal vapor; molten contact surfaces; recovery period; residual charge; vacuum switching devices; Breakdown voltage; Delay effects; Dielectric breakdown; Electric breakdown; Interrupters; Medium voltage; Plasma temperature; Power generation economics; Temperature dependence; Vacuum breakdown;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2000. Proceedings. ISDEIV. XIXth International Symposium on

Conference_Location

Xi´an

Print_ISBN

0-7803-5791-4

Type

conf

DOI

10.1109/DEIV.2000.879005

Filename

879005