Analog based first and fast second pulse removal system
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United States of America Patent
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Oct 3, 2000
Grant Date -
N/A
app pub date -
Nov 19, 1998
filing date -
Nov 19, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A silicon controller rectifier based analog circuit 10 that can be utilized in connection with known analog based residential arc detecting circuit breakers to reduce false tripping of the breakers is described. By eliminating the first current pulse in the time attenuated pulse counting circuit 10 as well as fast, subsequent cycle pulses, the possible tripping due to the one or two pulse lamp burnout false trips is substantially eliminated. The circuit 10 eliminates a first arc pulse in all conditions and a second arc pulse if it quickly follows the first pulse, thus reducing the breaker sensitivity as little as possible while significantly reducing, if not eliminating, false tripping when two consecutive high current arc pulses are generated.
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