Patent · US Active

Harmonics measurement instrument with in-situ calibration

US7511468B2 · kind B2 · utility

53Cited by
26References
4Claims
0Family size

Inventors

Key dates

Filing dateNov 20, 2006
Grant dateMar 31, 2009
Priority date—
Expiry dateNov 20, 2026

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R15/125
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A portable harmonics measurement instrument performs in-situ self-calibration of its current transducers and their associated measurement channels and of its voltage probes and their associated measurement channels. In-situ self-calibration is performed immediately before making a measurement on the alternating current power distribution grid. In-situ self-calibration is performed by means of a built-in voltage reference source and a built-in current reference source, which generate highly-accurate voltage and current calibration waveforms with harmonic components.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.