Method and device for determining the division of a total insulation resistance and the division of a total system leakage capacitance in an ungrounded power supply system

US11002776B2 · kind B2 · utility

Assignee

• Bender GmbH & Co. KG · DE

Inventors

• Dieter Hackl · Albach, DE
• Oliver Schaefer · Sankt Wendel, DE
• Pascal Becker · Nohfelden, DE
• Karl Schepp · Kreuztal, DE

Key dates

• Filing date: Jul 15, 2019
• Grant date: May 11, 2021
• Expiry date: Oct 22, 2039

Classification

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

Abstract

A method and device for determining a division of a total insulation resistance and of a total system leakage capacitance in an ungrounded power supply system. The basic idea is to determine how the total insulation resistance is divided into partial insulation resistances and how the total system leakage capacitance is divided into partial system leakage capacitances between the active conductors of the ungrounded power supply system from displacement voltages measured between each of the active conductors of the ungrounded power supply system based on values determined in advance for the total insulation resistance and for the total system leakage capacitance of the ungrounded power supply system. By evaluating the displacement voltages in terms of their changes in amplitude, their frequency and their phasing, conclusions can be drawn as to the division of the total insulation resistance and of the total system leakage capacitance between the individual active conductors.