Lightning arrester
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United States of America Patent
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-
Jul 25, 1989
Grant Date -
N/A
app pub date -
Oct 25, 1988
filing date -
Nov 5, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When the lightning device is overheated because of its long-time discharge, a conductive member having a low melting point is softened and melted by the overheated tube to short-circuit an air gap between main discharge electrodes. The main discharge electrodes are thus short-circuited to protect the lightning arrester from being overheated and damaged. When discharge function is lost between the main discharge electrodes, air discharge is carried out in the air gap. Electric appliances and machine connected to the lightning arrester can be thus protected from high voltage surge.
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