Diffusion of metal vapor from electrodes to the vacuum interrupter shield and its dependence on electrode construction

Author

Suzuki, Shinsuke ; Matsuo, Takahiro ; Sakuma, Ryohei ; Yanabu, Satoru

Author_Institution

Sch. of Eng., Tokyo Denki Univ., Japan

Volume

34

Issue

2

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

485

Lastpage

489

Abstract

In a high-voltage vacuum interrupter, the insulation of the ceramic envelope and shield decreases significantly due to the deposition during arcing. To increase the voltage rating of a vacuum circuit breaker, the diffusion of metallic particles to the vacuum interrupter shield was investigated. Metallic diffusion of the axial magnetic field electrode construction was extremely small because, due to the effect of the magnetic field, plasma was confined and effectively ionized within it. Electrode erosion of the axial magnetic field electrode during arcing was also extremely small.

Keywords

ceramic insulation; electrodes; plasma transport processes; plasma-wall interactions; vacuum arcs; vacuum circuit breakers; vacuum interrupters; arcing; axial magnetic field electrode; ceramic envelope insulation; electrode erosion; metal vapor diffusion; metallic particles; vacuum circuit breaker; vacuum interrupter shield; Ceramics; Circuit breakers; Electrodes; Insulation; Interrupters; Magnetic confinement; Magnetic shielding; Plasma confinement; Vacuum arcs; Voltage; High-voltage rating; metallic vapor density; shield current; shield voltage; vacuum circuit breaker (VCB);

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2006.872452

Filename

1621334