Method and apparatus for automatic transfer switch

Details Method and apparatus for automatic transfer switch Method and apparatus for automatic transfer switch

2008-04-22

2008-04-22

Duong, Frank (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S503000, C307S064000

Reexamination Certificate

active

10065461

ABSTRACT:
An automatic transfer switch includes; a housing, at least one switch for switching electrical connection from a first external power source to a second external power source, and a first and at least a second timer disposed within the housing, wherein the first and the at least a second timer have a first and at least a second time delay, respectively. The at least one switch being responsive to the first and the at least a second timer, and the at least a second time delay being nested within the first time delay.

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patent: 5739594 (1998-04-01), Sheppard et al.
patent: 5903065 (1999-05-01), Dragos
patent: 6172432 (2001-01-01), Schnackenberg et al.
University of Washington Engineering Services Facility Design Information, Automatic Transfer Switch, pp. 1-11, Aug. 2002.
Zenith, Operation And Maintenance Manual Transfer Switch Control Panel MX200 Microprocessor Controller, p. 1-34, 1998.

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