A Simple Method for Compensating Harmonic Distortion in Current Transformers: Experimental Validation [PDF]
Sensors, 2021 Conventional current transformers (CTs) suffer from nonlinearities due to their ferromagnetic cores. On one hand, it is well-known that severe core saturation may occur because of large overcurrents or unidirectional transient components: this may ...
Christian Laurano +2 more
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Comparison of Mathematical Methods for Compensating a Current Signal under Current Transformers Saturation Conditions [PDF]
Sensors, 2021 Current measurements from electromagnetic current transformers are essential for the construction of secondary circuit systems, including for protection systems.
Ismoil Odinaev +7 more
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Performance Problems of Non-Toroidal Shaped Current Transformers [PDF]
Sensors, 2020 Nowadays, non-toroidal shape primary pass-through current transformers are commonly used for large current machines with several cables per phase. As these transformers exhibit no radial symmetry, it is not clear if they can be tested using the indirect ...
Carlos A. Platero +4 more
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Are Inductive Current Transformers Performance Really Affected by Actual Distorted Network Conditions? An Experimental Case Study [PDF]
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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On the calibration of direct-current current transformers [PDF]
IEEE Transactions on Instrumentation and Measurement, 2014 Modern commercial direct-current current transformers (DCCT) can measure currents up to the kA range with accuracies better than 1E-5. We discuss here a DCCT calibration method and its implementation with commercial instruments typically employed in low ...
Callegaro, Luca +2 more
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Electronic Voltage and Current Transformers Testing Device [PDF]
Sensors, 2012 A method for testing electronic instrument transformers is described, including electronic voltage and current transformers (EVTs, ECTs) with both analog and digital outputs. A testing device prototype is developed.
Yong Xiao +3 more
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High-Voltage Isolated Multiple Output Auxiliary Power Supply with Output Voltage Self-Regulation
Energies, 2022 Power electronic transformers (PETs) have high voltage isolation requirements and a large number of modules, which requires the auxiliary power supply (APS) to achieve high voltage isolation and multiple outputs.
Yu Ai +5 more
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A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer
Energies, 2021 In power systems, the programmable numerical differential relays are widely used for the protection of generators, bus bars, transformers, shunt reactors, and transmission lines.
Umer Ehsan +8 more
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On the Remote Calibration of Instrumentation Transformers: Influence of Temperature
Energies, 2023 The remote calibration of instrumentation transformers is theoretically possible using synchronous measurements across a transmission line with a known impedance and a local set of calibrated voltage and current transformers.
Bart Verhelst +4 more
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Frequency Response Testing of Zero-Sequence Current Transformers for Mining Ground Fault Protection Relays [PDF]
International Journal of Electronics and Telecommunications, 2020 In Polish coal mining, medium voltage power distribution networks operate with an insulated neutral point. Zero-sequence current transformers are the basic sensors that generate input signals for earth-fault protection relays.
Krzysztof Kuliński, Adam Heyduk
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