Safety interface system

Details Safety interface system Safety interface system

2005-10-27

2008-09-16

Sherry, Michael J (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Plural transformers

Reexamination Certificate

active

07425780

ABSTRACT:
A symmetrical power system is provided that supplies a symmetrical power at an output power supply. The symmetrical power system comprises a first transformer and a second transformer which have identical transformer properties. The first and second transformers are each separately in communication with one of a first and second phase of an input power supply via corresponding first primary windings, and each separately in communication with one of a first and second phase of the output power supply via corresponding first secondary windings. The first and second transformers are connected in parallel between a input common conductor of the input power supply via corresponding second primary windings and an output common conductor connected the output power supply via corresponding second secondary windings. The first and second phases of the output power supply are inversely phased.

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Taylor, William T. Stationary Transformers, 1909, McGraw Publishing Company, New York.
Opinion and Search Report for PCT/US05/38890.

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