Current sensors
US4492919A · kind A · utility
58Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1982 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Apr 12, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/146
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor for measuring large magnitudes of A.C. current utilizes a conductive member having a higher-resistance element parallelled by a pair of elements with lower, and substantially equal, resistance and so arranged as to cause cancellation of magnetic field effects upon the higher-resistance element due to a flow of current through the lower-resistance elements. Thermal-effect compensation of the higher-resistance element of the sensor is also disclosed. Active load termination of a current-sensing transformer, positioned about the higher-resistance element, is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.