Lightning arrester with leakage current detection

Details Lightning arrester with leakage current detection Lightning arrester with leakage current detection

H - Electricity

01

C

317/13

H01C 7/12 (2006.01) H02H 3/04 (2006.01) H02H 9/04 (2006.01)

Patent

CA 1212411

LIGHTNING ARRESTER WITH LEAKAGE CURRENT DETECTION ABSTRACT OF THE DISCLOSURE A lightning arrester comprises nonlinear resistance discs 2 stacked within a ceramic casing 1, with annular metal cover rings 3, 4 being fixed to the opposite outer ends of the casing. Conductive plates 5, 19 having reduced thickness rupturable central portions are sealed to the inner ends of the casing, with the lower plate 19 being insulated from the lower ring 4 by an insulating ring 20. An ammeter 16 is connected between the conductive plate 19 and ground by a lead wire 21 passing through the ring skirt but insulated therefrom, whereby only leakage current passing through the nonlinear resistance discs is sensed.

431789

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