Surge voltage arrester with ventsafe feature
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United States of America Patent
Stats
-
Dec 23, 1980
Grant Date -
N/A
app pub date -
Jan 29, 1979
filing date -
Jan 29, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surge voltage arrester assembly comprises a primary gas tube surge arrester and an air gap secondary arrester that provides surge protection should the gas tube become vented to atmosphere. The secondary arrester has the air gap defined by a rim of one of the gas tube electrodes and a metallic cup into which the gas tube is positioned. In a three element version of the invention wherein the gas tube has two line electrodes and a ground electrode, metallic cups are provided at opposite ends of the gas tube to cooperate with the ground electrode for forming secondary air gaps for each line electrodes. An O-ring and a sealing compound seals each secondary air gap against the entrance of contaminants.
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