Leakage detection and control circuit
First Claim
1. LEAKAGE DETECTION AND CONTROL CIRCUIT FOR DETECTION OF UNDESIRED CURRENT LEAKAGE FROM A SINGLE PHASE ELECTRICAL LOAD WHEN CONNECTED IN A MAIN CIRCUIT TO A SINGLE PHASE SOURCE OF ELECTRICAL ENERGY, SAID LEAKAGE DETECTION AND CONTROL CIRCUIT COMPRISING A DIFFERENTIAL TRANSFORMER HAVING A PAIR OF LIKE PRIMARY WINDINGS FOR CONNECTION IN SUCH MAIN CIRCUIT IN BUCKING RELATIONSHIP TO NULLIFY CREATION OF FLUX IN ABSENCE OF LEAKAGE CURRENT, WHEN BOTH WINDINGS CARRY CURRENT OF SAME VALUE, AND A SECONDARY WINDING IN COUPLING RELATIONSHIP TO BOTH SAID PRIMARY WINDINGS FOR DEVELOPING A DIFFERENTIAL VOLTAGE IN RESPONSE TO A PREDOMINANCE OF FLUX GENERATED IN EITHER OF SAID PRIMARY WINDINGS, RESULTING FROM FLOW OF LEAKAGE CURRENT FROM SUCH LOAD, MEANS ENERGIZABLE FROM SUCH MAIN CIRCUIT AND CAPABLE OF RESPONDING TO SUCH DIFFERENTIAL VOLTAGE FOR OPENING SUCH MAIN CIRCUIT WHEN CONNECTED THERETO, AND MEANS FOR RETAINING SUCH MAIN CIRCUIT OPEN UPON SUCH OPENING THEREOF.
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1 Claim
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1. LEAKAGE DETECTION AND CONTROL CIRCUIT FOR DETECTION OF UNDESIRED CURRENT LEAKAGE FROM A SINGLE PHASE ELECTRICAL LOAD WHEN CONNECTED IN A MAIN CIRCUIT TO A SINGLE PHASE SOURCE OF ELECTRICAL ENERGY, SAID LEAKAGE DETECTION AND CONTROL CIRCUIT COMPRISING A DIFFERENTIAL TRANSFORMER HAVING A PAIR OF LIKE PRIMARY WINDINGS FOR CONNECTION IN SUCH MAIN CIRCUIT IN BUCKING RELATIONSHIP TO NULLIFY CREATION OF FLUX IN ABSENCE OF LEAKAGE CURRENT, WHEN BOTH WINDINGS CARRY CURRENT OF SAME VALUE, AND A SECONDARY WINDING IN COUPLING RELATIONSHIP TO BOTH SAID PRIMARY WINDINGS FOR DEVELOPING A DIFFERENTIAL VOLTAGE IN RESPONSE TO A PREDOMINANCE OF FLUX GENERATED IN EITHER OF SAID PRIMARY WINDINGS, RESULTING FROM FLOW OF LEAKAGE CURRENT FROM SUCH LOAD, MEANS ENERGIZABLE FROM SUCH MAIN CIRCUIT AND CAPABLE OF RESPONDING TO SUCH DIFFERENTIAL VOLTAGE FOR OPENING SUCH MAIN CIRCUIT WHEN CONNECTED THERETO, AND MEANS FOR RETAINING SUCH MAIN CIRCUIT OPEN UPON SUCH OPENING THEREOF.
Specification
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Current AssigneeFloyd M. Nash
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Original AssigneeFloyd M. Nash
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InventorsNash, Floyd M.
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Application NumberUS04/304,008Time in Patent Office998 DaysField of SearchUS Class Current361/45CPC Class CodesH02H 3/33 using summation current tra...
