Bridge circuits for sensing currents in a three phase a.c....

Details Bridge circuits for sensing currents in a three phase a.c.... Bridge circuits for sensing currents in a three phase a.c....

H - Electricity

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348/26, 324/35

H02H 7/26 (2006.01) G01R 31/08 (2006.01) H02H 3/08 (2006.01) H02H 3/34 (2006.01) H02H 1/06 (2006.01)

Patent

CA 1114488

BRIDGE CIRCUITS FOR SENSING CURRENTS IN A THREE-PHASE A.C. CIRCUIT Abstract of the Disclosure A bridge circuit including an eight-leg full wave rectifier bridge connected to rectify the phase and neutral currents produced by three wye-connected current transformers magnetically coupled to respective phases of a three- phase electric power circuit and used with one or more resis- tive elements to produce instantaneous D.C. voltage outputs at least once every current cycle, proportional to the highest and/ or lowest peak phase current and to the peak neutral or ground current of the power circuit, for operating or pre- venting the operation of a circuit interrupter in the power circuit being measured.

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