Method and system for monitoring electrical isolation
US10371735B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2015 |
| Grant date | Aug 6, 2019 |
| Priority date | — |
| Expiry date | Nov 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first voltage sensor measures a primary voltage between a first terminal of a tested device and electrical ground when a first switch and a second switch are in various on states or off states. In a test state either the first switch or the second switch is in an on state and in reference state both the first switch and the second switch are in on states. An observed leakage resistance is estimated based on the measured primary and secondary voltages of the test state. A reference leakage resistance is based on the measured primary and secondary voltages of the reference state. A test circuit has failed if the observed leakage resistance differs from the reference leakage resistance by more than a threshold amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.