Line fault isolation system
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United States of America Patent
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Mar 17, 1992
Grant Date -
N/A
app pub date -
Jun 18, 1990
filing date -
Jun 18, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An alarm system in which a pair of transmission lines are disposed in a loop to define two channels of transmission from a controller to a group of interconnected detectors, the improvement comprising a spaced group of line fault isolators interleaved with respective sub-groups of detectors and connected across the lines for sensing a short circuit on the transmission lines so as to isolate the short circuit condition; the isolators including an arrangement for switching, in response to a signal transmitted from the controller, those isolators which are physically located adjacent to the short circuit without interfering with the operation of other detectors in the loop.
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