High-voltage sensor with axially overlapping electrodes and local field sensors

US9279834B2 · kind B2 · utility

Assignee

• ABB RESEARCH LTD. · CH

Inventors

• Göran Eriksson · Hörby, SE
• Klaus Bohnert · Oberrohrdorf, CH
• Sergio Vincenzo Marchese · Zürich, CH
• Stephan Wildermuth · Laudenbach, DE

Key dates

• Filing date: Dec 7, 2012
• Grant date: Mar 8, 2016
• Expiry date: Sep 3, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R15/242
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A voltage sensor includes an insulator with mutually insulated electrodes embedded therein. The electrodes are coaxial and cylindrical and overlap axially along part of their lengths. They are mutually staggered and control the surfaces of electric equipotential such that there is a substantially homogeneous electric field outside the insulator and a substantially homogeneous but higher field within a sensing cavity within the insulator. A field sensor is arranged within the sensing cavity to locally measure the field. This design allows for the production of compact voltage sensors for high voltage applications.