WILLIAM FRANCIS GRIESACKER
Engineers in Moon Twp, PA
License number
Pennsylvania PE083791
Category
Engineers
Type
Professional Engineer
Address
Address
Moon Twp, PA 15108
Personal information
See more information about WILLIAM FRANCIS GRIESACKER at radaris.comName
Address
Phone
154 Dover Dr, Coraopolis, PA 15108
Coraopolis, PA
154 Dover Dr, Coraopolis, PA 15108
154 Dover Dr, Coraopolis, PA 15108
4091 Dominion Dr, Erie, PA 16510
Professional information
See more information about WILLIAM FRANCIS GRIESACKER at trustoria.com
Load Tap Changer
Load Tap Changer
US Patent:
2009014, Jun 11, 2009
Filed:
Dec 7, 2007
Appl. No.:
11/952673
Inventors:
Frederick A. Stich - Wisconsin Rapids WI, US
James H. Harlow - Mentone AL, US
William F. Griesacker - Moon Township PA, US
James H. Harlow - Mentone AL, US
William F. Griesacker - Moon Township PA, US
Assignee:
PENNSYLVANIA TRANSFORMER TECHNOLOGY, INC. - Canonsburg PA
International Classification:
G05B 24/02
US Classification:
323343
Abstract:
A load tap changer includes a single mechanical switch that is movable to create, in a first position, a first conducting path between a first transformer tap and a load. When the switch is in a second position, the switch creates a second conducting path between a second transformer tap and the load. A first thyristor pair or other device creates a first alternate conducting path between the first transformer tap and the load when the switch is disengaged from the first position. A second thyristor pair or other device creates a second alternate conducting path between the second transformer tap and the load when the mechanical switch is disengaged from the second position. Each thyristor pair may be selectively triggered to provide a conducting path when voltage across either thyristor pair exceeds a predetermined level. A gate trigger circuit may be included for each thyristor pair, and a gate control circuit may control each of the gate trigger circuits.