公开(公告)号：US20190198241A1

公开(公告)日：2019-06-27

申请号：US16170211

申请日：2018-10-25

Applicant: ABB Schweiz AG

Inventor： Jedrzej Banaszczyk ,  Jan Czyzewski ,  Bartlomiej Adamczyk ,  Lukasz Bachorz ,  Wojciech Wysocki ,  Marcin Tarnowski ,  Roger Hedlung ,  Peter Sjoberg ,  Jan Ostlund

IPC: H01F38/26 ,  H01F38/30 ,  H01F27/02 ,  H01F27/24 ,  H01F27/29 ,  H01F41/02 ,  H01F41/06

CPC classification number: H01F38/26 ,  H01F27/02 ,  H01F27/24 ,  H01F27/29 ,  H01F27/321 ,  H01F38/30 ,  H01F38/36 ,  H01F41/0206 ,  H01F41/06

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.