Post arc breakdown in vacuum circuit breakers
Tóm tắt
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.
Từ khóa
#Vacuum breakdown #Vacuum arcs #Circuit breakers #Electric breakdown #Delay #Electrodes #Plasma temperature #Copper #Breakdown voltage #Circuit testingTài liệu tham khảo
10.1007/978-1-4615-0583-9_43
10.1109/27.640673
schellkens, 1998, Arc Behavior in Axial Magnetic Field Vacuum Interrupters equipped with an External Coil, 18th ISDEV Eindhoven, 514
rowe, 2000, Particle Induced Breakdown in Vacuum Circuit Breakers, Intern Sympos Discharges and Electrical Insulation in Vacuum, 10.1109/DEIV.2000.877239