Study of Arc Mobility and Reignition in a Static Gap Discharge with Magnetic Field
NA
Motion of Magnetically Driven Arcs on Oxidized Electrodes
Experiments were carried out on a number of oxidized metals such as copper, brass, aluminum, and steel. Two kinds of rectangular electrodes were investigated, narrow and wide electrodes. On the narrow oxidized electrodes the arc moved slowly and sometimes discontinuously during its first run. During subsequent runs the arcs moved continuously along the same path of the first run with speeds which were ten times faster than the first run. On the wide oxidized electrodes however no slowdown of the arc was observed during its first run. It ran right away continuously with speeds similar to the subsequent runs.
Movement and Extinction of Switching-Arcs in Contactor Quench-Systems
The results of experimental studies are given regarding the influence of the magnetic field on the arc motion on different contact materials and on the arc extinction in the quench chamber. The tests were carried out with a model representing the kind of double-break system as used in contactors of the 20-kW range.