Title :
The influence of the axial magnetic field upon the low voltage electric arc in vacuum
Author :
Pavelescu, D. ; Dumitrescu, G. ; Nitu, S. ; Trusca, V. ; Pavelescu, D., Jr.
Author_Institution :
Dept. of Electr. Eng., Bucharest Politehnica Univ., Romania
fDate :
7/1/1999 12:00:00 AM
Abstract :
The investigation of the influence of an axial magnetic field upon the characteristics of the large power and low voltage vacuum arc is presented. The tests were provided by help of an experimental setup able to provide asymmetrical and reproducible short-circuit currents up to 54 kArms at 1360 Vrms. This current was interrupted in a monophase model of a vacuum switchgear, with the axial magnetic field generated by the interrupted current itself. Based on the experimental data, interesting results regarding the evolution of the arc voltage were achieved and original relationships for the evolution of the probability of breakdown failure, depending on the values of the current and axial magnetic field in the contact area were derived
Keywords :
circuit-breaking arcs; magnetic fields; probability; short-circuit currents; vacuum arcs; vacuum switches; 1360 V; 54 kA; arc voltage evolution; axial magnetic field; breakdown failure probability; contact area; high power; interrupted current; low voltage electric arc; low voltage vacuum arc; monophase model; short-circuit currents; vacuum arc; vacuum switchgear; Circuits; Coils; Current measurement; Electric variables measurement; Electromagnetic measurements; Low voltage; Magnetic field measurement; Magnetic fields; Magnetic switching; Testing;
Journal_Title :
Power Delivery, IEEE Transactions on
