Live circuit resistance measurement system and method
US5600255A · kind A · utility
10Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | Nov 20, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring the electrical resistance of a circuit energized with AC power. The invention imposes a known DC current in the circuit under test and senses a resulting DC voltage drop that corresponds to the resistance of the circuit. The invention senses AC overvoltage conditions in the circuit under test and electrically isolates the measuring circuit from the circuit under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.