Results 21 to 30 of about 64,705 (311)
Energies, 2021 In recent years, the new type design of current transformer with bushing structure has been widely used in the distribution network system due to its advantages of miniaturization, high mechanical strength, maintenance-free, safety and environmental ...
Bingbing Dong +5 more
doaj +1 more source
On the Calibration of Direct-Current Current Transformers (DCCT) [PDF]
IEEE Transactions on Instrumentation and Measurement, 2015 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 resistance calibration laboratories.
CALLEGARO, LUCA +2 more
openaire +3 more sources
Shielded Electronic Current Transformer [PDF]
IEEE Transactions on Instrumentation and Measurement, 2004 A current transformer with nominal ratio 10 A to 10 mA, intended for low-frequency applications, was developed. It includes an electronic device to reduce the magnetizing current, and a continuous shield in the secondary winding (coaxial cable) in order to eliminate the effect of stray capacitances. No guard-source is connected to the shield.
Slomovitz, Daniel, de Souza, Heriguatí
openaire +2 more sources
Technique of Performance Improvement of the Microprocessor-Based Protection Measuring Element
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2019 The technique is proposed to improve the performance of the measuring element of microprocessor-based protection and its implementation is considered at the software level.
F. A. Romaniuk +3 more
doaj +1 more source
A COMPREHENSIVE MODEL FOR THE POWER TRANSFORMER DIGITAL DIFFERENTIAL PROTECTION FUNCTIONING RESEARCH
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2016 This article presents a comprehensive model for the two-winding power transformer digital differential protection functioning research. Considered comprehensive model is developed in MatLab-Simulink dynamic simulation environment with the help of ...
Yu. V. Rumiantsev
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Pre-breakdown Characteristics of Contaminated Power Transformer Oil [PDF]
, 2007 In this paper we have studied pre-breakdown characteristics of transformer oil in the presence of different levels of contamination. The contaminant is fibrous dust from pressboard insulation used for high voltage transformers.
Zuber, H M +3 more
core +1 more source
Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations [PDF]
, 2011 The paper develops an efficient computational method for establishing equivalent characteristics of magnetic joints of transformer cores, with special emphasis on step-lap design.
Napieralska-Juszczak, E. +14 more
core +1 more source
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
doaj +1 more source