State-approved test centres in Germany supplying accuracy tests for instrument transformers must, in the future, provide measurement uncertainty budgets for their quality management systems. In this work, the cause of ratio error and phase displacement of instrument transformers are therefore 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. Finally, an example of an uncertainty budget for a current transformer of the class 0,2 S is given.
Kostenfreier Zugang
Open Access Gold
Rechteinformation
CC BY 4.0 ; Creative Commons Attribution 4.0 License
Themenbereich der Metrologie
Elektrizität und Magnetismus
Zitierung
Mohns, E. & Räther, P. (2018). Test equipment and its effect on the calibration of instrument transformers. Journal of Sensors and Sensor Systems, 7, 339–347. https://doi.org/10.5194/jsss-7-339-2018
