Abb Technology Ag

Abb Power Td & Company

Abb Inc.

Abb Schweiz Ag

David Matthew Geibel

Robert Alan Elick

William James Teising

Jon Christopher Brasher

Joshua Tyler Elder

Bobby Owen Thurmond, Jr

Jr Bobby Owen Thurmond

An on-load tap changer is provided and includes a plurality of modules disposed in an interior space of a tank and arranged in a side-by-side manner. Each module has a bypass switch assembly and a vacuum interrupter assembly mounted to a first side of a board. The bypass switch assembly is actuated by rotation of a bypass cam and the vacuum interrupter assembly is actuated by rotation of an interrupter cam. A transmission system rotates the bypass cam and the interrupter cam. The transmission system is mounted on a second side of the board.

Tap changer

An on-load tap changer is provided having a vacuum interrupter actuatable by a shaft. A movable shuttle is connected to an impact mass by springs such that the impact mass tends to follow the shuttle when the shuttle moves. A pawl assembly is operable to hold and then release the impact mass when the shuttle starts moving. The holding of the impact mass when the shuttle starts to move causes the springs to store both a compression force and a tension force, which are released when the impact mass is released.

Tap changer having an improved vacuum interrupter actuating assembly

An on-load tap changer is provided having a plurality of modules, each of which is operable to change taps in a winding of a transformer. A transmission shaft is connected to the modules and is operable upon rotation to effectuate tap changes in the windings. A servo motor rotates the transmission shaft. The servo motor includes a feedback device operable to generate a feedback signal containing information relating to the position of the motor shaft. A servo drive is connected to the servo motor to receive the feedback signal. The servo drive uses the feedback signal to determine and store a total angular displacement of the motor shaft. The servo drive uses the feedback signal and the total angular displacement of the motor shaft to control the operation of the servo motor.

Tap changer with an improved drive system

A selector switch assembly for a load tap changer includes a bevel gear coupled with a motor drive shaft. A shaft assembly is coupled with the bevel gear and a switch is provided for each phase. Each switch includes a helical gear fixed to the shaft assembly, a Geneva pinion gear engaged with the helical gear, a first Geneva gear wheel mounted on a first shaft moved by a first follower of the pinion gear, a first contact arm associated with the first Geneva gear wheel to rotate therewith, a second Geneva gear wheel mounted on a second shaft and moved by a second follower of the pinion gear, and a second contact arm associated with the second Geneva gear wheel so as to rotate therewith. The contact arms include contacts that engage fixed contacts that define tap positions of the load tap changer.

Selector switch assembly for load tap changer

A cured filler-less epoxy compound formed as a rigid, three-dimensional, transparent structure, including a cylindrical sight bowl of a utility or industrial high voltage bushing. A process for making a three-dimensional (e.g., cylindrical), transparent structure with improved strength, including the steps of obtaining a cured filler-less epoxy compound and then pre-stressing the filler-less epoxy compound.

Epoxy sight bowls for use in power transformers

An oil filled power bushing for a transformer in which the oil and nitrogen are separated by a movable piston within an expansion chamber for dividing said expansion chamber into a liquid filled section and a gas filled section, and means for sealing said piston with respect to a conductor and said expansion chamber.

Growing community of inventors

Jackson, TN, United States of America

David Matthew Geibel