Abb Schweiz Ag

Hitachi Energy Switzerland Ag

Abb Technology Ag

Abb Power Grids Switzerland Ag

Bartlomiej Adamczyk

Jan Czyzewski

Manoj Pradhan

Wojciech Piasecki

Harald Martini

Roberto Zannol

Rudi Velthuis

Patrick Meier

Santanu Singha

Thorsten Steinmetz

Adam Michalik

Rongsheng Liu

Urs Kruesi

Venkatesulu Bandapalle

Jedrzej Banaszczyk

Jonas Ekeberg

Spiros Tzavalas

Lukasz Bachorz

Wojciech Wysocki

Artur Siwek

Marcin Tarnowski

Roger Hedlung

Jan Ostlund

Michal Rzepecki

Lars Sjogren

Pawel Grysztar

The present invention refers to HV apparatus, in particular a HV dry current transformer, insulated with an insulating gel, or a voltage transformer, insulated with an insulating gel. The dry HV current transformer comprises at least two electrically conductive elements i.e. a head transformer cover, a head housing base, a core casing and a primary conductor. In the dry HV current transformer at least one of the electrically conductive elements has a coating made of solid insulating material separating the surface of the conductive elements from the insulating gel and adapted for limiting the electron emission from the conductive elements into the insulating gel. The voltage transformer comprises a bottom external housing, a bottom support flange, a core. In the voltage transformer at least one of the electrically conductive elements has a coating made of solid insulating material separating the surface of the conductive elements from the insulating gel and adapted for limiting the electron emission from the conductive elements into the insulating gel.

HV apparatus and a method of manufacturing such apparatus

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

Growing community of inventors

Niedzwiedz, Poland

Bartlomiej Adamczyk