Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1993-09-15
1995-05-30
Deboer, Todd
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 43, 361113, H02H 316
Patent
active
054207401
ABSTRACT:
In a ground fault circuit interrupter in which it was found that wide band noise induced by load transients is rectified by an op-amp in the detector circuit, false trips due to the wide band noise are eliminated by only comparing the output of the amplifier with a threshold of opposite polarity to that of the rectified noise signal and by eliminating capacitive coupling between the current sensor and the op amp. This requires an op amp with a low offset, on the order of about five percent or less.
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Raython Company Semiconductor Division; RV4145 Low Power Ground Fault Interrupter; Preliminary Product Specifications Linear Integrated Circuits RV4145 (pp. 1-7).
Engel Joseph C.
MacKenzie Raymond W.
DeBoer Todd
Eaton Corporation
Moran Martin J.
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