Universal fault circuit interrupter
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United States of America Patent
Stats
-
Nov 17, 1987
Issued Date -
N/A
app pub date -
Feb 20, 1986
filing date -
Feb 27, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Improved shock and electrical-fire protection circuits provide line-to-ground plus 'line-to-line' fault protection in a power system, and monitor conditions after protective interruption to safely provide automatic restoration of current when the fault is cleared. Both full-wave and half-wave circuits employ less expensive component combinations, including rectifiers and electromagnetic relays, to carry and switch load current. Protection is provided against the possibility of semi-conductor failure and the hazards associated with severed power conductors. A specialized resistance network fault detector for sensitizing enclosures, a hybrid zero sequence current transformer system and polyphase supply provide additional features.
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