High voltage current limiting fuse

Details High voltage current limiting fuse High voltage current limiting fuse

H - Electricity

01

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306/144

H01H 85/08 (2006.01) H01H 85/055 (2006.01) H01H 85/18 (2006.01) H01H 85/38 (2006.01)

Patent

CA 1083645

HIGH VOLTAGE CURRENT LIMITING FUSE Abstract of the Disclosure An improvement in a high voltage, full-range, current limiting fuse of the type which includes a perforated ribbon main fusible element wound about a gas evolving spider within a sand filled enclosure, and having a portion in intimate contact with a body of low melting temperature alloy, and an auxiliary fusible element whose ends are closely spaced from the main element on opposite sides of the alloy body. The portions of the main element in contact with the alloy body, and adjacent the ends of the auxiliary element are relatively long portions having a uniform cross sectional area less than half the cross sectional area of an unperforated remaining portion of the main element, to thereby reduce the time required for the fuse to clear the low magnitude fault current.

297862

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