Hitachi Energy Switzerland Ag

Lukasz Bachorz

Peter Sjöberg

Jan Czyzewski

Max Claessens

Pawel Klys

Filip Grecki

Jedrzej Banaszczyk

Bartlomiej Adamczyk

Pawel Aloszko

Krzysztof Obrebski

Marcin Czopek

Wojciech Wysocki

Witold Sobczak

Jan Ostlund

Roger Hedlung

Marcin Tarnowski

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

The subject of the present application is a cover for distribution transformer filled with a dielectric liquid, equipped with electronic device integrated with the cover which is applied for transmission and distribution of electric energy. The cover is characterized in that the electronic device is immersed in the dielectric liquid filling a cooling compartment fixed on the cover; the cooling compartment has side walls, a top wall and a bottom wall which bottom wall is matched in the window made in the cover and the bottom wall forms a thermal barrier between the interior of the electric power device and the interior of the cooling compartment and the both interiors of the cooling compartment and of the electric power device are hermetically closed together.

Cover for a distribution transformer filled with a dielectric liquid

Growing community of inventors

Cracow, Poland

Lukasz Bachorz