Title: Calibration of instrument current transformers at low currents using lock-in amplifier
Authors: Draxler, Karel
Styblíková, Renata
Citation: 2017 International Conference on Applied Electronics: Pilsen, 5th – 6th September 2017, Czech Republic, p.55-58.
Issue Date: 2017
Publisher: Západočeská univerzita v Plzni
Document type: konferenční příspěvek
URI: http://hdl.handle.net/11025/35408
ISBN: 978–80–261–0641–8 (Print)
978–80–261–0642–5 (Online)
ISSN: 1803–7232 (Print)
1805–9597 (Online)
Keywords: přístrojový proudový transformátor;lock-in zesilovač;kalibrace;poměrová chyba;fázový posun
Keywords in different language: instrument current transformer;lock-in amplifier;calibration;ratio error;phase displacement
Abstract in different language: A system for evaluating instrument current transformer errors using a lock-in amplifier is described in the paper. The difference between the standard and the transformer under test is evaluated as the ratio error and the phase displacement. The attention is focused to measurement of errors at the range of primary currents less than 20% of the nominal value. The measurement accuracy of current and energy in smart grids is important particularly at the time when the majority of appliances are in the standby mode.
Rights: © Západočeská univerzita v Plzni
Appears in Collections:Applied Electronics 2017
Applied Electronics 2017

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