Grounding conductor current minimizing circuitry

Details Grounding conductor current minimizing circuitry Grounding conductor current minimizing circuitry

H - Electricity

02

J

317/12

H02J 3/26 (2006.01) H02H 9/08 (2006.01) H02J 3/18 (2006.01)

Patent

CA 1113146

GROUNDING CONDUCTOR CURRENT MINIMIZING CIRCUITRY Abstract of the Disclosure Leakage currents in the grounding conductors of a.c. machine power supplies which frequently become excessive due to large capacitive reactance components connected from power line filter assemblies and/or e m c swamping capacitors to the machine frame is minimized with the addition of capacitive reactors of value substantially the same as the component reactance value. A power transformer secondary winding is connected to a load, for example, with one conductor grounded at the secondary winding connection and a relatively large capacitor connected between an ungrounded current carrying conductor and the machine frame. An autotransformer is connected with the primary winding thereof across the two conductors, and the secondary winding is connected in series with another capacitor of substantially the same value as the first capacitor from the grounded conductor to the machine frame. Polyphase power supplies are modified in much the same manner for each phase but one. -1-

304433

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