Journal of Sensors and Sensor Systems
Journal of Sensors and Sensor Systems
JSSS
Articles | Volume 7, issue 1
Articles | Volume 7, issue 1
https://doi.org/10.5194/jsss-7-339-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/jsss-7-339-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 7, issue 1
Regular research article
 | 
07 May 2018
Regular research article |  | 07 May 2018

Test equipment and its effect on the calibration of instrument transformers

Enrico Mohns and Peter Räther

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Short summary
Test centres supplying accuracy tests for instrument transformers must provide measurement uncertainties for their quality management. In this work, ratio error and phase displacement of instrument transformers are discussed. The traceability to the national standards of PTB, the attainable uncertainty and the permitted error limits of test equipment for testing instrument transformers are presented. An example of an uncertainty budget for a current transformer of the class 0,2 S is given.
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Special issue
Evaluating measurement data and uncertainty