Set up and Characterization of Reference Measuring Systems for On-site Live Verification of HV Instrument Transformers

  1. French College of Metrology
  1. G. Crotti1,
  2. A. Sardi1,
  3. N. Kuljaca2,
  4. P. Mazza2 and
  5. G. de Donà3

Published Online: 3 FEB 2010

DOI: 10.1002/9780470611371.ch47

Transverse Disciplines in Metrology

Transverse Disciplines in Metrology

How to Cite

French College of Metrology (2009) Set up and Characterization of Reference Measuring Systems for On-site Live Verification of HV Instrument Transformers, in Transverse Disciplines in Metrology, ISTE, London, UK. doi: 10.1002/9780470611371.ch47

Author Information

  1. 1

    Istituto Nazionale di Ricerca Metrologica - Strada delle Cacce 91, Turin (Italy)

  2. 2

    CESI RICERCA S.p.A. - via Rubattino 54, Milan (Italy)

  3. 3

    Terna S.p.A - Strada del Drosso 75, Turin (Italy)

Publication History

  1. Published Online: 3 FEB 2010
  2. Published Print: 1 JAN 2009

ISBN Information

Print ISBN: 9781848210486

Online ISBN: 9780470611371

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Keywords:

  • temperature effects;
  • rogowski coil;
  • phase displacement;
  • proximity effects;
  • uncertainty budget

Summary

Prototype reference measuring systems (RMS) for the on-site verification of high voltage instrument transformers for energy metering have been set up. Their use can make possible the identification, without service removal, of the current and voltage transformers which no longer comply with the accuracy requirements. Specific measurement procedures have been experimented in the characterization of the RMSs, which include as reference transducers a Rogowski coil and a resistive-capacitive divider for the current and voltage measurement respectively. The uncertainty associated with the on-site use of the RMSs is evaluated considering the operating conditions which are likely to occur. The results obtained in the first tests carried out show the feasibility of a live, on-site accuracy check of the instrument transformers.