Overvoltage surge arrester with quick-acting pressure relief means
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United States of America Patent
Stats
-
Jan 21, 1997
Grant Date -
N/A
app pub date -
Aug 11, 1994
filing date -
Aug 11, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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