Transfer switch device and method

Details Transfer switch device and method Transfer switch device and method

2008-04-01

2008-04-01

Sherry, Michael (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Load current control

Reexamination Certificate

active

10904441

ABSTRACT:
This disclosure is concerned with devices and methods for voltage source transfer switching that reduces or eliminates transformer saturation due to DC flux built up during a transfer event. First and second voltage sources (primary and alternate) are connectable to a load via corresponding switches. A transformer is connected downstream of the switches. A controller operates the switches according to various transfer methods wherein a switching time is determined to minimize downstream saturation current.

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PCT Written Opinion of the International Searching Authority for International Application No. PCT/US2005/004155 dated Jun. 17, 2005.

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