Title :
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
fDate :
4/1/2006 12:00:00 AM
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);
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2006.872452
