Strengthened magnetic-field contacts for vacuum interrupters

A. A. Pertsev; L. A. Rylskaya; S. P. Chistyakov

doi:10.1117/12.174662

1 May 1994 Strengthened magnetic-field contacts for vacuum interrupters

A. A. Pertsev, L. A. Rylskaya, S. P. Chistyakov

Proceedings Volume 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum; (1994) https://doi.org/10.1117/12.174662
Event: XVI International Symposium on Discharges and Electrical Insulation in Vacuum, 1994, Moscow-St. Petersburg, Russian Federation

Abstract

Contacts design with amplified axial magnetic field for vacuum interrupters is described. Axial field specific induction reaches 10 mT/kA, that is the cause of time reduction for high current (> 10 kA) arc transition from contracted to quasi-diffuse modification. The arc movement on contacts surfaces is controlled by radial magnetic field up to arc transition from contracted to quasidiffuse modification. Both high current arc modifications control permits to decrease contacts separation velocity. During one pole tests 25 - 27 kA current was interrupted by contacts with diameter near 70 mm at 35 kV recovery voltage, 50 Hz, both at 1,1 m/s and 0,8 m/s separation velocity.

Citation Download Citation

A. A. Pertsev, L. A. Rylskaya, and S. P. Chistyakov "Strengthened magnetic-field contacts for vacuum interrupters", Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); https://doi.org/10.1117/12.174662

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