Abb Inc.

Abb Technology Ag

Abb Schweiz Ag

Robert C Ballard

Rafael Gutierrez

Edgar A Wimmer, Jr

Nathan T Sigman

Rafael Murillo

Charles W Johnson

Bandeep Singh

William Edward Pauley, Jr

Thomas A Hartmann

Jong-Yun Lim

Chang-Hyeon Lee

Joseph Leo Tedesco

Hae-Sun Yang

Young-Jin Ha

Josiah Levi Vandervelde

Thomas A Gburek

Ryan Christian Tyler Alkire

Pascal Schutt

Brian J Akers

Chang-Yeol Lim

A dry type cast coil transformer () includes a hollow body (), a dome structure () extending from the body, and undulation structure (), defining at least a portion of an outer surface of the dome structure, constructed and arranged to increase an electrical track path in the dome structure.

Enhanced track resistant dome structure for dry-type cast coil transformer

Arc resistant enclosures for dry-type transformers. More particularly, transformer enclosures having one or more arc-resistant features, including arc channels, arc fault dampers, and arc fault plenums, and methods for providing same.

Method of providing arc-resistant dry type transformer enclosure

A method provides a radial drop winding for an open wound transformer. A plurality of non-electrically conductive posts are arranged to define an interior space. Each post is of generally L-shape having a main body and a leg extending from a bottom end of the main body. During an open winding process, conductive wire is dropped to build up lengthwise along the posts to define at least one generally cylindrical winding segment supported by the legs of the posts.

Radial drop winding for open-wound medium voltage dry type transformers with improved support structure

A protective coating system for application to exposed surfaces of a transformer core prevents corrosion of the core. The protective coating is suitable for use in industrial and marine environments where many factors impact the life of the transformer core. The protective coating comprises at least three coating layers. The first coating layer is an inorganic zinc silicate primer. The second coating layer is a polysiloxane. The third coating layer is a room temperature or high temperature vulcanizing silicone rubber. A silicone rubber sealant may be further applied to outer edge surfaces of the core.

Corrosion-resistant coating system for a dry-type transformer core

Arc-resistant dry type transformer enclosure having arc fault damper apparatus

Arc-resistant dry type transformer enclosure having arc channels

Methods of providing arc resistant switchgear enclosures for dry-type transformers are provided. The enclosures have one or more arc-resistant features, including arc channels, arc fault dampers, and arc fault plenums. In a preferred embodiment, the method comprises providing a base structure with a dry-type transformer seated thereon, providing walls and a roof, wherein at least the front wall contains at least one longitudinal seam covered by an arc channel.

A method of manufacturing a transformer that includes forming a disc-wound coil using a plurality of pre-formed cooling ducts. Each cooling duct may be supported by a support pipe secured between walls of the cooling duct, or by a removable insert. First and second conductor layers are formed, each of which include plurality of disc windings arranged in an axial direction of the disc-wound coil. A spacer layer is formed between the first and second conductor layers to form a plurality of axially-extending passages. The cooling ducts are slid into the axially-extending passages so as to be disposed between the first and second conductor layers.

Disc wound transformer with improved cooling

Plant support

Growing community of inventors

Wytheville, VA, United States of America

Robert C Ballard