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USE OF A CURRENT SOURCE FOR CALIBRATING AN AUTOMATIC TRANSFORMER TEST SET

Karel Draxler, Renata Styblíková, Michal Ulvr
  • Abstract:
    This paper describes an innovative procedure for calibrating sets for evaluating instrument current transformer (ICT) errors. The innovation lies in the use of a current source for generating a measured current. There is an adjustable current source at 50 Hz mains frequency with a current transformer on its output. The internal impedance must be sufficiently high to eliminate the methodic error due to calibration. Calibration is carried out by means of a measuring system controlled by a PC through an IEEE 488 bus. Known values of the simulated ratio error and phase displacement are compared with the values measured by the device that is being tested. A software tool determines the simulated and measured error at each calibration point and determines whether the instrument that is being tested fulfils the parameters stated by the manufacturer.
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  • DOI:
    _unreg_tc4-2008.010

Event details:

  • IMEKO TC:
    TC4
  • Event name:
    Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
  • Title:
    XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation (together with 13th IMEKO TC4 Workshop on ADC Modelling and Testing)
  • Place:
    Florence, ITALY
  • Time:
    22 September 2008 - 24 September 2008