Method and electric circuit arrangement for determining a branch insulation resistance and a branch leakage capacitance in an ungrounded power supply system
US12072366B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2023 |
| Grant date | Aug 27, 2024 |
| Priority date | — |
| Expiry date | Jul 10, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and an electric circuit arrangement for determining a branch insulation resistance and a branch leakage capacitance of a line branch to be monitored in a branched, ungrounded power supply system having active conductors and a measuring voltage fed centrally by a controllable measuring voltage source and a residual current caused by the measuring voltage being registered using a current sensor in the line branch to be monitored. The centrally supplied measuring voltage is formed over a generator period having a characteristic signal form defined via the frequency composition. By this (frequency) modulation of the measuring voltage, information is transmitted from the central feed location of the measuring voltage to the current sensor disposed in the line branch to be monitored. Based on this information, the current sensor can establish with which resistance value the coupling circuit feeds the measuring voltage in the corresponding generator period, without another communication channel being required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.