Energy meter system and method for calibration
US7474087B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Mar 3, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R35/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An energy meter device includes a first analog/digital transformer having an input configured to provide a signal derived from a voltage and a second analog/digital transformer having an input configured to provide a signal derived from a current. A first input of the phase evaluation block is electrically connected to the output of the first analog/digital transformer and a second input of the phase evaluation block is electrically connected to the output of the second analog/digital transformer. The energy meter device also includes a phase correction block electrically connected to the output of the phase evaluation block and configured to correct a phase deviation of a digitized signal that is derived from the current or the voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.