Title :
Prebreakdown emission current measurements in a 24 kV vacuum interrupter with butt contacts
Author :
Vries, L.M.J. ; Damstra, G.C.
Author_Institution :
Div. of Res. & Dev., KEMA, Arnhem, Netherlands
fDate :
2/1/1988 12:00:00 AM
Abstract :
Commercial 24-kV vacuum interrupters with butt contacts were tested under DC conditions with three different contact materials: OFHC-copper, stainless steel 304 and Cu/Cr (75/25, wt.%). The critical breakdown field was computed at contact distances of 1, 2 and 3 mm, based on the prebreakdown emission current and the breakdown voltage. While the values for the critical breakdown field for OFHC-copper and stainless steel 304 were in agreement with the values found by other authors, no previous data were found for Cu/Cr.
Keywords :
circuit breakers; electric breakdown; switchgear testing; vacuum apparatus; 1 mm; 2 mm; 24 kV; 3 mm; Cu; CuCr; DC conditions; breakdown voltage; butt contacts; contact distances; contact materials; critical breakdown field; prebreakdown emission current; stainless steel 304; testing; vacuum interrupter; Breakdown voltage; Chromium; Circuit testing; Current measurement; Electric breakdown; Interrupters; Resistors; Steel; Vacuum breakdown; Voltage measurement;
Journal_Title :
Electrical Insulation, IEEE Transactions on
