Combined monitoring device for insulation-resistance monitoring and protective-conductor-resistance monitoring of a power supply system
US11156653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2020 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Sep 23, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L2250/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A combined monitoring device for insulation-resistance monitoring and protective-conductor-resistance monitoring in a power supply system includes a grounded power supply system and an ungrounded power supply system, the combined monitoring device having a coupling circuit for being coupled to one or several active conductors of the grounded power supply system via coupling points, the combined monitoring device including an active monitoring device with a first operating mode for monitoring an insulation resistance in an ungrounded network state of the power supply system and a second operating mode for monitoring a protective-conductor resistance in a grounded network state of the power supply system, the combined monitoring device having an evaluation unit switchable between the first and second operating modes as a function of the ungrounded or grounded network state and configured for testing the insulation resistance in the first operating mode and the protective-conductor resistance in the second operating mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.