Title :
Post arc breakdown in vacuum circuit breakers
Author :
Rowe, S.W. ; Schellekens, H.
Author_Institution :
Centre de Recherche A3, Schneider Electr., Grenoble, France
Abstract :
The influence of contact out-gassing on late breakdowns has been studied. Results show that strongly delayed breakdowns can occur for conditions corresponding to those of the left hand side of the Paschen curve. Cold gas breakdown delay times are shown to depend directly and precisely on pressure. Delays of up to 100ms are possible. The late breakdown mechanism is thus not a random phenomenon. The observed scatter of delay times is hence produced by shot to shot fluctuations of the pressure.
Keywords :
circuit-breaking arcs; electric breakdown; switchgear testing; vacuum arcs; vacuum circuit breakers; vacuum insulation; 100 ms; Paschen curve; cold gas breakdown delay times; contact out-gassing; late breakdowns; post arc breakdown; shot to shot pressure fluctuations; strongly delayed breakdowns; vacuum circuit breakers; Breakdown voltage; Circuit breakers; Circuit testing; Copper; Delay; Electric breakdown; Electrodes; Plasma temperature; Vacuum arcs; Vacuum breakdown;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2002. 20th International Symposium on
Print_ISBN :
0-7803-7394-4
DOI :
10.1109/ISDEIV.2002.1027298
