Overvoltage surge arrester with quick-acting pressure relief mea

Details Overvoltage surge arrester with quick-acting pressure relief mea Overvoltage surge arrester with quick-acting pressure relief mea

1994-08-11

1997-01-21

Hoang, Tu

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 21, 361127, H01C 710, H02H 904

Patent

active

055963080

ABSTRACT:
A surge arrester having a cylindrical housing with a throughbore, a metal terminal at each end of the housing, varistor elements located within the housing bore, and a vent within at least one terminal for venting arc-generated gases from the interior of the housing in the event of an arc being developed within the bore as a result of failure of a varistor element. The vent can be formed as a passage extending through one of the terminals from the bore to the exterior thereof via a substantially straight-line path that extends longitudinally of the bore. An electrode connected to the other terminal is spaced from the one terminal by a gap located externally of the insulating housing. The gap arcs over in response to receipt of arc-generated gases from the bore. The gap is located at the end of the housing of the one terminal.

REFERENCES:
patent: 4001651 (1977-01-01), Kershaw
patent: 4100588 (1978-07-01), Kresge
patent: 4910632 (1990-03-01), Shiga et al.
patent: 5402100 (1995-03-01), Urbanek et al.

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