Method for detecting a rotation direction in three-phase networks
US6466002B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for identifying a rotation direction of a three-phase network includes the steps of sampling the individual phases at given times and using an evaluation algorithm to evaluate the measured values or interpolated approximate values, or only the mathematical signs of the values, in order to determine the rotation direction. In addition to the basic method for an ideal signal profile, half-wave-rectified signal profiles of individual phase conductors can preferably be evaluated. The method can advantageously be used to detect the rotation direction with a digital overload relay, using a digital signal control and/or signal processing which is already provided in the digital overload relay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.