Vacuum-state estimation of vacuum circuit breakers

Geert C. Damstra; Rene P.P. Smeets; H. B. F. Poulussen

doi:10.1117/12.174656

1 May 1994 Vacuum-state estimation of vacuum circuit breakers

Geert C. Damstra, Rene P.P. Smeets, H. B. F. Poulussen

Proceedings Volume 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum; (1994) https://doi.org/10.1117/12.174656
Event: XVI International Symposium on Discharges and Electrical Insulation in Vacuum, 1994, Moscow-St. Petersburg, Russian Federation

Abstract

The vacuum state of vacuum switching elements after production is checked normally by Penning- or Magnetron methods (combined electrical and magnetic field). Vacuum in the range of 10^-1 - 10^-4 Pa can be measured in this way. After assembly into circuit breakers however, these methods are not applicable. HF interruption performance during making operation has been proposed earlier as a possible alternative. Further investigations show that differences in the number of HF prestrike current loops can be found in the pressure range of 10^-1 - 10⁵ Pa. Current chopping of DC arcs between 5 and 30 A during opening operation, may be another option for determination of the pressure range by measuring the lifetime of the arc, but the resolution in the vacuum range below 10^-1 Pa is too poor.

Citation Download Citation

Geert C. Damstra, Rene P.P. Smeets, and H. B. F. Poulussen "Vacuum-state estimation of vacuum circuit breakers", Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); https://doi.org/10.1117/12.174656

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