Abb Schweiz Ag

Abb Research Ltd.

Abb Technology Ag

Abb Power Grids Switzerland Ag

Thorsten Steinmetz

Benjamin Weber

Jens Tepper

Frank Cornelius

Martin Carlen

Bernardo Galletti

Roberto Zannol

Arthouros Iordanidis

Jasmin Smajic

Santanu Singha

Venkatesulu Bandapalle

Lars Liljestrand

Marcos Bockholt

Lise Donzel

Charles W Johnson

Manoj Pradhan

Burak Esenlik

Harald Martini

Bhavesh Patel

Adam Michalik

Andrzej Rybak

Jedrzej Banaszczyk

Stephan Schnez

Stéphane Schaal

Dierk Bormann

Renata Porębska

Jonas Ekeberg

Bartlomiej Adamczyk

Malena Bergsblom

Bernhard Petermeier

Bhavesch Patel

Lukasz Bachorz

Philipp Buttgenbach

Artur Siwek

Jiahua Zhang

Claudio Ibarra

Manoj Padhan

Bartomiej Adamczyk

Renata Porebsska

Philipp Buttenbach

Thomas Hartmann

Joel Kern

The present invention relates to an electrical device comprising a gas-insulated transformer or reactor. The electrical device comprises a housing enclosing an interior space, at least a portion of which defining an insulation space containing a dielectric insulation fluid comprising an organofluorine compound, and an electrical component being arranged in the insulation space and being surrounded by the insulation fluid. The electrical component comprises at least one winding. The electrical device further comprises an electrical connector for bringing the apparatus from non-operational state to operational state by connecting at least one winding to a power grid. The device further comprises an auxiliary power source which is connectable to at least one winding when the apparatus is in the non-operational state.

Electrical device comprising a gas-insulated apparatus, in particular a gas-insulated transformer or reactor

A transformer arrangement and transformer for mitigating transient voltage oscillations. The transformer included a transformer core enclosing at least one core leg. A winding is wound around one of the at least one core leg. The winding extends from a first winding terminal to a second winding terminal and includes a first winding section along a first conductor extending from the first winding terminal to a first intermediate end point, and a second winding section along a second conductor extending from a second intermediate end point to the second winding terminal. The transformer arrangement further includes an external passive electric component connected between the first intermediate end point and either the second intermediate end point or the second winding terminal arranged to decrease an effective difference between capacitive and inductive voltage distributions between the intermediate end points such that transient voltage oscillations in the winding are mitigated.

Transformer arrangement for mitigating transient voltage oscillations

A method of manufacturing a polymer-insulated conductor. The method includes the steps of a) providing a conductor having a first cross-sectional shape, b) passing the conductor through a conductor-shaping die to shape the conductor such that the conductor obtains a second cross-sectional shape, wherein frictional heat is developed in the conductor, thereby setting the conductor in a heated state, c) applying molten polymer to the conductor when the conductor is in the heated state to obtain a polymer-coated conductor, and d) shaping the polymer-coated conductor by means of a polymer-shaping die to thereby obtain the polymer-insulated conductor.

Method of manufacturing a polymer-insulated conductor

A transformer and a method of manufacturing a transformer are disclosed. The transformer can include a transformer core with at least three core limbs which are arranged in parallel with respect to one another and perpendicular to corner points of an area spanned by a polygon, and wherein axial end regions of each of the at least three core limbs transition into a respective yoke segment arranged transversely with respect to the axial end regions. Main windings can be arranged around each of the at least three core limbs in a hollow-cylindrical winding region. A magnetic cross section of a respective core limb can be greater than a magnetic cross section of the respective yoke segment. Additional windings can be electrically connected to a respective main winding and can be arranged around each of the respective yoke segments.

Transformer

An encapsulated delta transformer for medium to high voltages includes a hermetically sealed housing that encloses a volume, a delta shaped transformer arranged in the housing, and a passageway for a fluid. The passageway protruding through the housing and the volume enclosed by the passageway is in fluidal connection to an outside of the housing.

Gas-insulated delta transformer

The disclosure is related to a dry transformer, which includes a transformer core with at least two parallel limbs and upper and lower yokes, and at least two hollow cylindrical coils, each arranged as neighbored coils around a limb of the at least two parallel limbs. A cooling system can include at least one wall-like diaphragm in-between the neighbored coils, which is in parallel to the orientation of the limbs.

Cooling system for dry transformers

Growing community of inventors

Baden-Dättwil, Switzerland

Thorsten Steinmetz