IEEE - The Institute of Electrical and Electronics Engineers@ Inc.
Scope
This part of IEC 61869 establishes a common viewpoint of the evaluation of uncertainty in calibration and its application in testing of Instrument Transformers (IT) used for a.c (in the frequency range 15Hz ?C 3kHz) covering Low Voltage (LV) as well as High Voltage (HV). This part of IEC 61869 covers the uncertainty evaluation in calibration of IT independently of the technology used (either inductive or non-inductive IT) with both analogue and digital output format. This part of IEC 61869 also provides a guideline for on-site calibration of IT. The document reports how to take into account the sources of uncertainty of the calibration set-up and how to combine their effects in order to evaluate the uncertainty in the calibration results. Furthermore@ the document will present also the test procedures to be used for assessing the accuracy of IT. Note: this publication has a dual-logo IEC/IEEE.