Prüftechnik und deren Einfluss bei der Kalibrierung von Messwandlern

Mohns, E.; Rather, P.

doi:10.1515/teme-2016-0045

Cited by 2 publications

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“…Moreover, the standard measuring systems used at PTB for the calibration of the test equipment of test centres and of the measurement uncertainties achieved is illustrated. Finally, an uncertainty budget for the assessment of an instrument transformer in a state-approved test centre or a notified body is calculated as an example (Mohns and Raether, 2017).…”

Section: Introductionmentioning

confidence: 99%

Test equipment and its effect on the calibration of instrument transformers

Mohns

Rather

2018

J. Sens. Sens. Syst.

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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.Published by Copernicus Publications on behalf of the AMA Association for Sensor Technology.

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Section: Introductionmentioning

confidence: 99%

Test equipment and its effect on the calibration of instrument transformers

Mohns

Rather

2018

J. Sens. Sens. Syst.

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Modeling Stray Capacitances of High-Voltage Capacitive Dividers for Conventional Measurement Setups

et al. 2021

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Stray capacitances (SCs) are a serious issue in high-voltage (HV) applications. Their presence can alter the circuit or the operation of a device, resulting in wrong or even disastrous consequences. To this purpose, in this work, we describe the modeling of SCs in HV capacitive dividers. Such modeling does not rely on finite element analysis or complicated geometries; instead, it starts from an equivalent circuit of a conventional measurement setup described by the standard IEC 61869-11. Once the equivalent model including the SCs is found, closed expressions of the SCs are derived starting from the ratio error definition. Afterwards, they are validated in a simulation environment by implementing various circuit configurations. The results demonstrate the expressions applicability and effectiveness; hence, thanks to their simplicity, they can be implemented by system operators, researchers, and manufacturers avoiding the use of complicated methods and technologies.

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Prüftechnik und deren Einfluss bei der Kalibrierung von Messwandlern

Cited by 2 publications

References 0 publications

Test equipment and its effect on the calibration of instrument transformers

Test equipment and its effect on the calibration of instrument transformers

Modeling Stray Capacitances of High-Voltage Capacitive Dividers for Conventional Measurement Setups

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