Three-phase electrical power measurement system including three transformers and a measurement circuit to calculate the power thereof
US6373238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement system includes a first transformer enclosed within a first housing and magnetically linked to a first cable where the first transformer senses changing current within the first cable and in response produces a first output voltage. A second transformer is enclosed within a second housing and magnetically linked to a second cable where the second transformer senses changing current within the second cable and in response produces a second output voltage. A third transformer is enclosed within a third housing and magnetically linked to a third cable where third transformer senses a changing current within the third cable and in response produces a third output voltage. A measurement circuit is electrically connected to the combination of the first transformer to receive a first input signal representative of the first output voltage, the second transformer to receive a second input signal representative of the second output voltage, and the third transformer to receive a third input signal representative of the third output voltage. The measurement circuit calculates an output value representative of electrical power within the first, second, and third cables in respon…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.