Voltage sensing device

US10338103B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Mark Gravermann · Erkelenz, DE
• Gunther Stollwerck · Krefeld, DE
• Michael H. Stalder · Neuss, DE
• Hermanus Franciscus Maria van Meijl · Someren-Eind, NL
• Jens Weichold · Erkelenz, DE
• Benjamin Muenstermann · Duisburg, DE

Key dates

• Filing date: Sep 25, 2015
• Grant date: Jul 2, 2019
• Expiry date: Nov 29, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R19/0084
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a voltage sensing device (1) for a high and/or medium voltage power carrying conductor (2), the voltage sensing device comprising: a radially outer electrode (3) operable as a first sensing electrode of a sensing capacitor for sensing the voltage of the power carrying conductor; a radially inner electrode (2, 6) operable as a second sensing electrode of the sensing capacitor; a dielectric material (5) arranged between the inner and the outer electrode (3, 2, 6), wherein the coefficient of thermal expansion of the material of at least one electrode (3, 2, 6) is selected such that it compensates the temperature dependent parameters of the dielectric material (5) and/or the other electrode (3, 2, 6), that influences the capacity of the voltage sensing capacitor.