Method and apparatus for parallel engine generators

Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source

Reexamination Certificate

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Reexamination Certificate

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07816813

ABSTRACT:
A method and apparatus for paralleling engine generators. One or more closed transition transfer switches (CTTSes) are coupled to two or more engine generators. A system controller is programmed to operate the one or more CTTSes so that each of the generators provides an emergency power and so that the generators may simultaneously supply emergency power to the power bus.

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patent: 6191500 (2001-02-01), Toy
patent: 6538345 (2003-03-01), Maller
patent: 2006/0028069 (2006-02-01), Loucks et al.
patent: 1 006 641 (2010-06-01), None
International Search Report issued by the European Patent Office in application serial No. PCT/US2007/079951.
Castenschiold, “Closed-Transition Switching of Essential Loads”, IEEE Transactions on Industry Applications, IEEE Service Center, vol. 25, No. 3, May 1, 1989, pp. 403-407.
Hornack et al., “Automated Bus Transfer Control for Critical Industrial Processes”, Proceedings of the Industrial and Commercial Power Systems Technical Conference. Detroit, Apr. 30-May 3, 1990.
http://www.generack.com/Industrial/Transfer—Switches, Mar. 19, 2010.
http://www.geindustrial.com/cwc/Dispatcher?REQUEST=PRODUCTS&pnlid-5&famid-40&catid-84&8d-epro, Mar. 19, 2010.
http://www.russelectric.com/UtilParaSw.htm, Mar. 19, 2010.

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