Results 21 to 30 of about 46,417 (263)
Energies, 2023 In this review article, ideas for the development of measuring methods and setups to test inductive instrument transformer accuracy for the transformation of distorted current or voltage are analyzed. This article proposes limiting values for ratio error
Michal Kaczmarek, Ernest Stano
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The Reference Wideband Inductive Current Transformer
Energies, 2023 The aim of this paper is to show that the developed inductive current transformer may ensure the required wideband transformation accuracy and it may be applied, as the reference source, in the measuring system for the evaluation of the transformation ...
Michal Kaczmarek +2 more
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External Excitation of Axial Magnetic Field for Intermediate-Frequency Vacuum Arc Research
IEEE Access, 2019 In order to the make the magnetic field synchronous with the actual current in the current interruption experiment, an external excitation of axial magnetic field for intermediate-frequency vacuum arc experiment and research is designed and tested in ...
Yuan Jiang +5 more
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Fast Detection of Current Transformer Saturation Using Stacked Denoising Autoencoders
Energies, 2023 Malfunctions in relay protection devices are predominantly caused by current transformer (CT) saturation which produces distortion in current measurements and disturbances in power system protection.
Sopheap Key +3 more
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A Novel Self-Powered Smart Current Sensor for Power Equipment
Elektronika ir Elektrotechnika, 2019 Current measurement is one of the most important work in online monitoring of the electric system. Self-powered and intelligence are key areas of the current measuring sensor.
Jie Ren +6 more
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Calculation of 220kV Transformer Bias Current Based on the Earth and Power Grid Model in the Metro Area [PDF]
E3S Web of Conferences, 2021 The metro stray current will be generated during subway operation, which will affect the electromagnetic environment near the subway, and then affect the surrounding 220kV transformer.
Chen Lu +6 more
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Digital Current Measurement Element for Operation During Current Transformer Severe Saturation
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2018 The development and implementation of a digital current measurement element for proper operation during current transformer (CT) magnetic core severe saturation are considered.
Yu. V. Rumiantsev +3 more
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CT Saturation Detection with Calculation of Instantaneous Impedance of Magnetic Branch Using FILT [PDF]
مجله مدل سازی در مهندسی, 2017 Accurate indiscrimination of CT saturation can be caused mal-operation of protection systems. Due to nonlinear and loss characteristic behavior of CTs, it is necessary to use a numerical method to detect CT saturation, accurately.
Alireza Fallahi +2 more
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The two-stage current transformer [PDF]
Journal of the American Institute of Electrical Engineers, 1922 This paper presents a brief discussion of the current transformer as used with measuring and controlling apparatus with special reference to the degree of accuracy which can be attained in the ratio and phase angle. A new type of current transformer is then described, in which it is possible to secure much higher accuracy with a given amount of iron ...
Brooks, H. B., Holtz, F. C.
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