Electromagnetic transient voltage surge suppression system

Details Electromagnetic transient voltage surge suppression system Electromagnetic transient voltage surge suppression system

2005-05-03

2005-05-03

Patel, Rajnikant B. (Department: 2838)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S107000, C361S042000

Reexamination Certificate

active

06888709

ABSTRACT:
Three single-phase transformers are provided, the primary sides connected in a Wye configuration. One terminal on the primary side of each transformer is coupled to a reference node and the other terminal on the primary side of each transformer is coupled to one phase of the power supply bus. The secondary sides of the transformers are connected in a delta configuration through a resistor. The circuit connecting the secondary sides of the transformers is not electrically connected to ground.

REFERENCES:
patent: 3764855 (1973-10-01), Beachley
patent: 4200836 (1980-04-01), Okada et al.
Characteristics of Different Power Systems Neutral Grounding Techniques: Fact & Fiction, D.D. Shipp, Westinghouse Electric Corp., Pittsburgh, PA and F.J. Angelini, Westinghouse Electric Corp., Philadelphia, PA, no date.
Resistive Grounding Techniques, Martin Glover, Post Glover Resistors, Incorporated, Erlanger, KY, no date.

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