Column recovery of wall-stabilized d.c. arcs in air

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Abstract
Detailed results are given of the steady-state characteristics, over the current range 4-40 A, for d.c. arcs in air burning through a 5 mm bore in a stack of water-cooled disks. The corresponding decay of the conductance has been determined over a period of 300 μs following rapid interruption (similar 1 μs). These measurements have also been obtained under externally imposed gas-flow conditions (0-2·5 1. min−1). It has been found that both the steady state and recovery are dependent upon humidity and, furthermore, that the recovery is sensitive to the radial gas flow which is generated after interruption.
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