3m Innovative Properties Company

Guenther A J Stollwerck

Jens Weichold

Mark Gravermann

Michael H Stalder

Bernd Schubert

Christine B Bund

Guenter M Zilligen

Johannes Fink

Harald Westkamp

Sebastian Eggert-Richter

Mirco Gunjaca

Willy A Ahlmann

Voltage sensor () comprising a voltage divider () for sensing an AC voltage of a HV/MV power conductor (). For adjusting the common overall impedance of the low-voltage portion of the voltage divider towards a desired impedance, the low-voltage portion () comprises one or more low-voltage impedance elements (), a plurality of adjustment impedance elements () 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 (). The overall impedance of the high-voltage portion () and the overall impedance of the low-voltage portion () of the voltage divider () are adapted such that, by bringing one or more of the switches () into their connect state, the voltage divider () 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.

Adjustable voltage sensor

Growing community of inventors

Krefeld, Germany

Guenther A J Stollwerck