Title :
High current interruption in vacuum circuit breakers
Author :
Binnendijk, M. ; Merck, W.F.H. ; Smeets, R.P.P. ; Watanabe, K. ; Kaneko, E.
Author_Institution :
Eindhoven Univ. of Technol., Netherlands
Abstract :
A great number of interruption experiments were made in a vacuum chamber with the contact materials Cu, CuCr (50/50) and AgWC. The currents to be interrupted varied from 2.5 to 32 kA. The rate of change of current and recovery voltage were kept at a fixed value immediately after current zero. Many reignitions of the dielectric type were observed but only a few of the thermal type. No evidence of strong anode spot melting was found. At 5 to 10 μs after post arc current, a “second” post arc current also appeared
Keywords :
circuit-breaking arcs; electric breakdown; electrical contacts; electrodes; insulation testing; switchgear testing; vacuum arcs; vacuum breakdown; vacuum circuit breakers; vacuum interrupters; 2.5 to 32 kA; 5 to 10 mus; AgWC; Cu; CuCr; contact materials; current change rate; current zero; dielectric reignitions; high current interruption; interruption experiments; post arc current; recovery voltage; thermal reignition; vacuum chamber; vacuum circuit breakers; Anodes; Circuit breakers; Circuit testing; Coils; Dielectric materials; Switched capacitor circuits; Switches; Switching circuits; Transient analysis; Voltage;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1996. Proceedings. ISDEIV., XVIIth International Symposium on
Conference_Location :
Berkeley, CA
Print_ISBN :
0-7803-2906-6
DOI :
10.1109/DEIV.1996.545366
