The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2023
Filed:
Oct. 25, 2018
Hitachi Energy Switzerland Ag, Baden, CH;
Jedrzej Banaszczyk, Wieliczka, PL;
Jan Czyzewski, Cracow, PL;
Bartlomiej Adamczyk, Niedzwiedz, PL;
Lukasz Bachorz, Cracow, PL;
Wojciech Wysocki, Cracow, PL;
Marcin Tarnowski, Przasnysz, PL;
Roger Hedlung, Ludvika, SE;
Peter Sjoberg, Ludvika, SE;
Jan Ostlund, Ludvika, SE;
Hitachi Energy Switzerland AG, Baden, CH;
Abstract
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.