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Restriction on Motion of Break Arcs Magnetically Blown-Out by Surrounding Walls in a 450VDC/10A Resistive Circuit
Keisuke KATO Junya SEKIKAWA
IEICE TRANSACTIONS on Electronics
Publication Date: 2016/09/01
Online ISSN: 1745-1353
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices)
electromagnetic relay, permanent magnet, high speed camera, arc extinction,
Full Text: PDF(3.5MB)>>
Silver electrical contacts are separated at constant speed and break arcs are generated between them in a 200V-450VDC and 10A resistive circuit. The motion of the break arcs is restricted by some surrounding alumina plates. Transverse magnetic field of a permanent magnet is applied to the break arcs. Changing the supply voltage and the height of a wall located at the upper side of the break arcs, the arc lengthening time and motion of the break arcs are investigated. As a result, the higher supply voltage causes an increase of the arc lengthening time. The arc lengthening time increases significantly when the break arcs expand into the whole of the surrounding walls.