Results 11 to 20 of about 162,004 (308)
EnergiesNanocrystalline material provides an opportunity to improve the wideband performance of inductive current transformers and enables the possibility of ensuring their transformation accuracy for distorted and sinusoidal current from 50 Hz up to 20 kHz ...
Michal Kaczmarek
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IET Electric Power Applications, 2019 The increasing number of non‐linear loads and renewable energy sources causes a decrease in the power quality in the power networks. Therefore, tests of current transformers should be performed in similar conditions. This requires generation by a high current testing transformer of distorted currents that rms values are from a few hundred to several ...
Michal Lukasz Kaczmarek, Ernest Stano
semanticscholar +4 more sources
Estimation of the inductive current transformer derating for operation with distorted currents
Bulletin of the Polish Academy of Sciences Technical Sciences, 2014 Abstract The aim of the paper is to present a new method for estimation of the CT (Current Transformer) rated primary current and / or load of the secondary winding derating levels for transformation of distorted current in relation to the rated values fixed for transformation of sinusoidal current.
M. Kaczmarek
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Amplification of S-1 Spheromak current by an inductive current transformer [PDF]
, 1985 We attempt to predict the consequences of adding an inductive current transformer (OH Transformer) to the present S-1 Spheromak experiment. Axisymmetric modeling with only classical dissipation shows an increase of toroidal current and a shrinking and hollowing of the current channel, conserving toroidal flux.
Jardin, S. C., Janos, A., Yamada, M.
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Nonlinearity of Magnetic Core in Evaluation of Current and Phase Errors of Transformation of Higher Harmonics of Distorted Current by Inductive Current Transformers [PDF]
IEEE Access, 2020 The novelty of the paper contributes to the increase of the reliability of the methods used for evaluation of the inductive CTs accuracy of transformation of the distorted current.
Michal Kaczmarek, Ernest Stano
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Scientific ReportsThis paper explores the implications of employing a load exhibiting a power factor of 1 to test the transformation accuracy of an inductive current transformer with an apparent power below 5 VA. It offers an explanation of the change in current error and
Michał Kaczmarek
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Sensors, 2020 The aim of this work is to assess whether actual distorted conditions of the network are really affecting the accuracy of inductive current transformers.
Alessandro Mingotti +4 more
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Thermal Aspect in Operation of Inductive Current Transformers and Transducers
EnergiesAn increase in the temperature of the magnetic core causes narrowing of its hysteresis loop and reduction in the saturation magnetic flux density. Therefore, at the same operating point on the magnetization characteristic, the nonlinear effect may become
Michal Kaczmarek, Artur Szczesny
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A Novel Differential High-Frequency Current Transformer Sensor for Series Arc Fault Detection
Sensors, 2019 Fault arc detection is an important technology to ensure the safe operation of electrical equipment and prevent electrical fires. The high-frequency noise of the arc current is one of the typical arc characteristics of almost all loads.
Guanghai Bao +3 more
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