Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1984-06-29
1987-06-09
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361 97, 361 42, 361 47, 307200A, 365201, 364483, 364492, H02H 300
Patent
active
046725016
ABSTRACT:
Circuit protection and protective relay functions are provided by common circuit elements under the control of a single processor unit. Voltage and current values are obtained on a continuous basis and these values are continuously monitored within the processor to determine the electrical status of a protected power distribution system. Upon the occurrence of an overcurrent or undervoltage condition, the circuit is interrupted by operation of a circuit breaker trip solenoid causing the breaker contacts to open. When the overcurrent or undervoltage condition ceases to exist, the circuit breaker contacts could be closed by operation of a controlled relay. The ROM and RAM storage elements within the processor unit are continuously tested and the circuit breaker contacts are opened upon indication that the ROM or RAM element is nonfunctional.
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Peatman, John B., "Microcomputer-Based Design", McGraw-Hill, 1977, pp. 312-318.
Bilac Mario M.
Dougherty John J.
Premerlani William J.
Purkayastha Indrajit
Bernkopf Walter C.
General Electric Company
Hoff Marc S.
Jacob Fred
Menelly Richard A.
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