Title :
Anode erosion of a high-current multigap vacuum triggered switch
Author :
Alferov, D.F. ; Nevrovsky, V.A. ; Sidorov, V.A.
Author_Institution :
Russian Electrotech. Inst., Moscow, Russia
Abstract :
The paper studies discharge plasma interaction with anode rods of a six-gap vacuum switch resulting in surface melting of copper anode rods and metal droplet formation from electrode material. Using high-speed photography, anode spots formation was recorded and spot dimensions were determined at various discharge currents from ~30 kA up to ~100 kA. There is presented a one-dimensional nonstationary model of surface anode melting and droplet formation in an anode spot of vacuum arc. Observations of erosion traces at anodes of operative multigap vacuum switches and high-speed photos of discharge in model switches show, that the model of melting and droplet formation by ponderomotive action of discharge current is correct
Keywords :
anodes; switchgear testing; vacuum arcs; vacuum switches; 30 to 100 kA; anode erosion; anode rods; anode spots formation; discharge current; discharge currents; discharge plasma interaction; droplet formation; electrode material; high-current multigap vacuum triggered switch; high-speed discharge photos; high-speed photography; metal droplet formation; one-dimensional nonstationary model; operative multigap vacuum switches; six-gap vacuum switch; spot dimensions; surface anode melting; vacuum arc; Anodes; Copper; Electrodes; Glass; Photography; Surface discharges; Switches; Vacuum arcs; Vacuum systems; Voltage;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2000. Proceedings. ISDEIV. XIXth International Symposium on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5791-4
DOI :
10.1109/DEIV.2000.879040
