Spark gap

Details Spark gap Spark gap

H - Electricity

01

T

317/19

H01T 4/16 (2006.01) H01J 17/40 (2006.01)

Patent

CA 1092188

SPARK GAP Abstract of the Disclosure A current limiting spark gap for use in a valve type lightning or surge arrester includes a plurality of identical, mirror-image insulating gap plates assembled together to define arc elongation and cooling chambers between each pair of adjacent gap plates. Conductive electrodes are disposed on opposite sides of each gap plate. Dielectric rods extend through holes formed in the gap plates to vertically and horizontally align the gap plates in a vertical stack and to define and maintain the gap spacing between a pair o electrodes in each arc chamber. The spark gap utilizes only the electrode and arc chamber configurations to cause a follow current arc to move in each arc chamber to increase the length of the arc and to compress the arc against cooling walls and surfaces of the arc chambers. The electrode and arc chamber configura- tions achieve greater arc elongation and compression, and resultant cooling, to enhance follow current limitation. The follow current arc is elongated and compressed from a point of arc initiation through a projected angle exceeding 200°.

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