Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1991-04-25
1993-04-20
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361 97, H02H 308
Patent
active
052047970
ABSTRACT:
A device for detecting a primary fault current at a three phase current system and converting the detected fault current into mechanical action for breaking the circuit includes circuitry for breaking the circuit in response to a selected secondary current substantially instantaneously rising to a predetermined level and a device for adjusting the predetermined level.
REFERENCES:
patent: 4922372 (1990-05-01), O'Brien, III
O'Brien, III Edward R.
Rifkin Edward
Deboer Todd E.
Quinn Charles N.
SPD Technologies Inc.
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