Jeffrey Dean Powell

US Patent:

7932635, Apr 26, 2011

Filed:

Feb 1, 2008

Appl. No.:

12/024906

Inventors:

Suratkal P. Shenoy - Mission Viejo CA, US
Peter A. Panfil - Columbus OH, US
Jeffrey M. Powell - Lewis Center OH, US
Richard T. Caudill - Westerville OH, US
William A. Barcus - Worthington OH, US
James K. Martin - Galena OH, US

Assignee:

Liebert Corporation - Columbus OH

International Classification:

H02J 9/00
H02J 3/00

US Classification:

307 64, 307 80

Abstract:

An electrical power transfer system for selectively connecting a load to a first power source or a second power source includes a first switch having an input selectively connected to the first power source and an output connected to the load. A second switch includes an input and an output connected to the load. An isolation device has its input connected to the second power source and its output connected to the input of the second switch to provide a continuous neutral path for the second power source and to isolate a neutral current path of the load from the second power source.

US Patent:

20080278003, Nov 13, 2008

Filed:

May 9, 2007

Appl. No.:

11/746080

Inventors:

Jack H. Pouchet - Foothill Ranch CA, US
Peter A. Panfil - Columbus OH, US
Jeffrey M. Powell - Lewis Center OH, US

Assignee:

LIEBERT CORPORATION - Columbus OH

International Classification:

H02J 7/00

US Classification:

307 66

Abstract:

The disclosure provides an efficient alternative energy uninterruptible power supply (UPS) system having a main first source of power coupled to an electrical load, comprising: a second source of power from stored energy coupled to the electrical load, the second source being adapted to supplement the first source and condition the power from the stored energy to predetermined conditions for the electrical load; an automatic transfer switch (ATS) coupled between the first source and the second source and adapted to control the first source coupling to the electrical load when the first source power is noncompliant with predetermined conditions for the electrical load; and a source of alternative energy coupled downstream of the ATS to the second source, the electrical load, or a combination thereof, wherein the source of alternative energy comprises a source of direct current (DC) power.