We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Numerical study of arc in SF<sub>6</sub> gas circuit breaker with externally applied magnetic field.
- Authors
Hirayama, Satoshi; Fujino, Takayasu; Ishikawa, Motoo; Mori, Tadashi; Kawano, Hiromichi
- Abstract
The influence of an externally applied magnetic field on the characteristics and the transient behavior of the arc in a gas circuit breaker is examined by means of three-dimensional time-dependent numerical simulations. It is assumed that the gas circuit breaker has a ring-shaped permanent magnet and an arc is exposed to the externally applied magnetic field. Numerical results demonstrate that the rotation of arc induced by the Lorentz force produces a three-dimensional spiral structure of the arc. As a consequence of the rotation, the arc shrinks and the arc temperature decreases remarkably just before the time when the arc current is zero, so that applying the magnetic field increases the arc voltage. The numerical results also show that a swirling flow generated by the Lorentz force carries a thermal energy toward the thermal puffer room mainly by the convection during the high arc current phase, and as a result the pressure in the thermal puffer room increases. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
- Subjects
MAGNETIC fields; ELECTRIC transients; GAS circuit breakers; PERMANENT magnets; LORENTZ force
- Publication
IEEJ Transactions on Electrical & Electronic Engineering, 2016, Vol 11, Issue 4, p410
- ISSN
1931-4973
- Publication type
Article
- DOI
10.1002/tee.22257