Hybrid MOV/gas-tube AC surge protector for building entrance
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United States of America Patent
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-
Aug 17, 2004
Grant Date -
N/A
app pub date -
Dec 22, 2000
filing date -
Dec 22, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surge protector for single-phase or multi-phase power lines is disclosed, for permanent connection near the entrance of power lines to a building, that has a basic protector sub-circuit of a metal-oxide varistor (MOV) and a gas-discharge tube (GDT) connected in series between the power line and building ground. Preferably, the gas-discharge tube is a three-element GDT and is connected to two metal-oxide varistors. In a multi-phase implementation, the present invention includes one or more protector sub-circuits connected between each power line and ground, wherein each protector sub-circuit includes two metal-oxide varistors connected to a power line and a gas-discharge tube connected to the building ground.
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