Results 11 to 20 of about 33,033 (241)

Calculation of the Eddy Current Losses in a Laminated Open-Type Transformer Core Based on the $\overrightarrow{A},\overrightarrow{T}-\overrightarrow{A}$ Formulation

Applied Sciences, 2021
Losses due to eddy currents in an open-type transformer core are significantly reduced by the lamination of the transformer core. In order to further reduce the eddy current losses, the open-type core often has a multi-part structure, i.e., it is ...
Stjepan Frljić, Bojan Trkulja, Igor Žiger   +2 more
doaj   +1 more source

Precise Amplitude and Phase Determination Using Resampling Algorithms for Calibrating Sampled Value Instruments

Sensors, 2020
Sampling-based calibration systems for calibrating “Sampled Value” (SV)-based instruments for substation automation require synchronised and time-aligned sampling processes.
Yeying Chen, Enrico Mohns, Michael Seckelmann, Soeren de Rose   +3 more
doaj   +1 more source

Test equipment and its effect on the calibration of instrument transformers [PDF]

Journal of Sensors and Sensor Systems, 2018
State-approved test centres in Germany supplying accuracy tests for instrument transformers must, in the future, provide measurement uncertainty budgets for their quality management systems.
E. Mohns, P. Räther
doaj   +1 more source

Evaluation of Methodology for Lightning Impulse Voltage Distribution over High-Voltage Windings of Inductive Voltage Transformers

Energies, 2021
Knowledge of lightning impulse (LI) voltage distribution over transformer windings during the design stage of the transformer is very important. Specific design differences in inductive voltage transformers make the transient analysis approach different ...
Bojan Trkulja, Ana Drandić, Viktor Milardić, Igor Žiger   +3 more
doaj   +1 more source

Machine Learning Approach Application for High-voltage Instrument Transformers Technical State Assessment [PDF]

ITM Web of Conferences, 2019
This paper describes the possibilities of machine learning application in the tasks of technical state assessment of high-voltage instrument transformers.
Khalyasmaa Alexandra, Stepanova Alina, Shatunova Daria, Manusov Vadim   +3 more
doaj   +1 more source

Modelling and optimisation of design of non-conventional instrument transformers [PDF]

, 2019
In this paper, we have proposed, modelled and optimised several designs of non-conventional instrument transformer (NCIT) for high voltage overhead transmission lines (400kV).
Bojan Nikolić, British Standards Institution, Lings R, Nikolić B, Nikolić B, Sanowar Khan   +5 more
core   +1 more source

Evaluation of the Accuracy and Frequency Response of Medium-Voltage Instrument Transformers under the Combined Influence Factors of Temperature and Vibration

Energies, 2023
Instrument transformers are largely used to measure voltages and currents in public electricity networks. Their performance is essential for Power Quality measurements. Tests and procedures to estimate the effect of single influence factors are performed
Mohamed Agazar, Daniela Istrate, Patrice Pradayrol   +2 more
doaj   +1 more source

A Method for the Measurement of Digitizers’ Absolute Phase Error [PDF]

, 2018
A lot of engineering applications, from telecommunications to power systems, require accurate measurement of phase angles. Some of them, like synchrophasor measurement and calibration of instrument transformers with digital output, in order to reach ...
Crotti, G., Delle Femine, A., Gallo, D., Giordano, D., Landi, C., Luiso, M., Scaldarella, A.   +6 more
core   +1 more source

Ultrasonic partial discharge monitoring method on instrument transformers [PDF]

Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2012
Sonic and ultrasonic partial discharge monitoring have been applied since the early days of these phenomena monitoring. Modern measurement and partial discharge acoustic (ultrasonic and sonic) monitoring method has been rapidly evolving as a result of ...
Kartalović Nenad, Ilić Nikola, Milošević Ana, Teslić Dragan, Cakić Nikola, Milosavljević Srđan   +5 more
doaj   +1 more source

HTS transformer and its related loss measurement and quench protection techniques [PDF]

, 2008
Recently research and development concerning applications of high temperature superconducting (HTS) transformers have been progressed actively in the world.
Chen, X, Guo, Y, Jin, J, Zhan, Y, Zhu, J
core   +1 more source