Faulted current indicators and inrush restraints therefor
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United States of America Patent
Stats
-
Mar 26, 1991
Issued Date -
N/A
app pub date -
Jun 30, 1989
filing date -
Jun 6, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A faulted circuit indicator includes an inrush restraint circuit that suppresses a trip signal when an inrush current rises from below a minimum value to a trip value within a predetermined time and then drops again to another value such as the trip value. According to various aspects the restraint ends after a fixed time or after a variable time. According to another aspect a second trip circuit overrides the inrush restraint circuit when the current rises a given amount beyond the first trip value.
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