Summary

Issues related to the accuracy and calibration of instrument transformers with digital output are presented, addressing both laboratory and field calibration. Both IEC and IEEE accuracy definitions are considered, and appropriate circuits for high-accuracy calibration are reviewed. An update on EURAMET EMPIR Futuregrid II project is provided, showing the latest efforts in enabling deployment of digital voltage and current sensors in the evolving grid. Finally, examples of the use of digital low power instrument transformers for practical field calibration of other instrument transformers are presented.

Additional informations

Publication type Working Group Reports
Reference WGR_319_2
Publication year 2021
Publisher CIGRE
Study committees Transmission & distribution equipment (A3)
Working groups WG A3.31
File size 2 MB
Pages number 26
Price for non member 30 €
Price for member Free

Authors

TAVARES COELHO, STEIN, MASSARA, TÜNNERHOFF, PANT, KINCAID MACKENZIE, COFFEY, LAKNER, BELL, AREVALO, MCCARTY

Keywords

accuracy, calibration, digital instrument transformers, low power instrument transformers, merging unit

Accuracy and Calibration of Instrument Transformers with Digital Output
Accuracy and Calibration of Instrument Transformers with Digital Output