Adjustable voltage sensor

US12130308B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Guenther A. J. Stollwerck · Krefeld, DE
• Mark Gravermann · Erkelenz, DE
• Bernd Schubert · Cologne, DE
• Christine B. Bund · Wuppertal, DE
• Mirco Gunjaca · Nottuln, DE
• Jens Weichold · Erkelenz, DE
• Johannes Fink · Bergheim, DE
• Michael H. Stalder · Neuss, DE
• Sebastian Eggert-Richter · Wülfrath, DE
• Harald Westkamp · Hattingen, DE
• Willy A. Ahlmann · Neuss, DE
• Guenter M. Zilligen · Grevenbroich, DE

Key dates

• Filing date: Sep 14, 2020
• Grant date: Oct 29, 2024
• Expiry date: Jun 28, 2041

Classification

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

Abstract

Voltage sensor (1) comprising a voltage divider (40) for sensing an AC voltage of a HV/MV power conductor (10). For adjusting the common overall impedance of the low-voltage portion of the voltage divider towards a desired impedance, the low-voltage portion (60) comprises one or more low-voltage impedance elements (110), a plurality of adjustment impedance elements (80) and a plurality of switches. In its connect state, each switch electrically connects an adjustment impedance element in parallel to at least one of the one or more low-voltage impedance elements (110). The overall impedance of the high-voltage portion (50) and the overall impedance of the low-voltage portion (60) of the voltage divider (40) are adapted such that, by bringing one or more of the switches (90) into their connect state, the voltage divider (40) has, for an AC voltage of between 5 and 25 kV phase-to-ground and a frequency of between 40 and 70 Hertz, a dividing ratio of 3077, of 6154, of 6769 or of 10 000.