Conferences related to Current Transformers

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2021 IEEE Pulsed Power Conference (PPC)

The Pulsed Power Conference is held on a biannual basis and serves as the principal forum forthe exchange of information on pulsed power technology and engineering.


2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies


2020 IEEE 18th International Conference on Industrial Informatics (INDIN)

INDIN focuses on recent developments, deployments, technology trends, and research results in Industrial Informatics-related fields from both industry and academia


2020 IEEE 29th International Symposium on Industrial Electronics (ISIE)

ISIE focuses on advancements in knowledge, new methods, and technologies relevant to industrial electronics, along with their applications and future developments.


2020 IEEE Applied Power Electronics Conference and Exposition (APEC)

APEC focuses on the practical and applied aspects of the power electronics business. Not just a power designer’s conference, APEC has something of interest for anyone involved in power electronics including:- Equipment OEMs that use power supplies and converters in their equipment- Designers of power supplies, dc-dc converters, motor drives, uninterruptable power supplies, inverters and any other power electronic circuits, equipments and systems- Manufacturers and suppliers of components and assemblies used in power electronics- Manufacturing, quality and test engineers involved with power electronics equipment- Marketing, sales and anyone involved in the business of power electronic- Compliance engineers testing and qualifying power electronics equipment or equipment that uses power electronics


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Periodicals related to Current Transformers

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Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Dielectrics and Electrical Insulation, IEEE Transactions on

Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.


Electrical Insulation Magazine, IEEE

The magazine covers theory, analysis, design (computer-aided design), and practical implementation of circuits, and the application of circuit theoretic techniques to systems and to signal processing. Content is written for the spectrum of activities from basic scientific theory to industrial applications.


Electromagnetic Compatibility, IEEE Transactions on

EMC standards; measurement technology; undesired sources; cable/grounding; filters/shielding; equipment EMC; systems EMC; antennas and propagation; spectrum utilization; electromagnetic pulses; lightning; radiation hazards; and Walsh functions


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Most published Xplore authors for Current Transformers

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Xplore Articles related to Current Transformers

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IEEE Guide for the Application of Current Transformers Used for Protective Relaying Purposes Corrigendum 1: Corrections to Equation 18 and Equation 19

IEEE Std C37.110-2007/Cor 1-2010 (Corrigendum to IEEE Std C37.110-2007), 2011

Errors in Equation (18) and Equation (19) are corrected by this corrigendum.


IEEE Guide for Field Testing of Relaying Current Transformers - Redline

IEEE Std C57.13.1-2006 - Redline, 2007

This guide describes field test methods that assure that current transformers are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after having been in service for a period of time.


A Partial Discharge Detection Method for SF6Insulated Inverted Current Transformers Adopting Inner Shield Case as UHF Sensor

IEEE Transactions on Power Delivery, 2018

A partial discharge (PD) detection method for SF6insulated inverted current transformers (SIICTs) adopting an inner shield case as an ultra-high frequency (UHF) sensor is proposed in this paper. The inner shield case is a component of the SIICT. Its structure is similar to that of an antenna and can be used as a UHF sensor to measure the PD UHF ...


The Analysis of Possibility of Applying Current Transformers of Zero Sequence of Different Manufacturers Fordesigning Damaged Feeder Identification Systems

2019 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus), 2019

The article considers common zero-sequence current transformers of different manufacturers, assesses their amplitude and phase errors. Analyzes the possibility of their application to determine the malfunctioned feeder for single-phase earth faults using algorithms based on the calculation of the instantaneous powers of the zero sequence. Justifies the necessity of replacement of obsolete zero-sequence current transformers with modern ones for designing ...


Failure of service aged 230 kV current transformers

2012 IEEE International Symposium on Electrical Insulation, 2012

As of the spring of 2008 Manitoba Hydro had in service up to 39 current transformers rated 230 kV from a particular supplier. These had been manufactured in 1969, 1971 and 1975. Three failed explosively beginning in the summer of 2008. Dissolved gas-in-oil analysis revealed others with significant fault gas. As of the end of 2011 all remaining 230 kV ...


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Educational Resources on Current Transformers

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IEEE.tv Videos

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IEEE-USA E-Books

  • IEEE Guide for the Application of Current Transformers Used for Protective Relaying Purposes Corrigendum 1: Corrections to Equation 18 and Equation 19

    Errors in Equation (18) and Equation (19) are corrected by this corrigendum.

  • IEEE Guide for Field Testing of Relaying Current Transformers - Redline

    This guide describes field test methods that assure that current transformers are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after having been in service for a period of time.

  • A Partial Discharge Detection Method for SF6Insulated Inverted Current Transformers Adopting Inner Shield Case as UHF Sensor

    A partial discharge (PD) detection method for SF6insulated inverted current transformers (SIICTs) adopting an inner shield case as an ultra-high frequency (UHF) sensor is proposed in this paper. The inner shield case is a component of the SIICT. Its structure is similar to that of an antenna and can be used as a UHF sensor to measure the PD UHF signal. A 110 kV current transformer is used as an experimental object and the voltage standing-wave ratio of the inner shield case is calculated. The validity and sensitivity of this method are proved by experiments with ac voltage. This PD detection method solves the problem that the UHF sensor is difficult to mount inside current transformers and provides a novel method for PD detection of SIICTs.

  • The Analysis of Possibility of Applying Current Transformers of Zero Sequence of Different Manufacturers Fordesigning Damaged Feeder Identification Systems

    The article considers common zero-sequence current transformers of different manufacturers, assesses their amplitude and phase errors. Analyzes the possibility of their application to determine the malfunctioned feeder for single-phase earth faults using algorithms based on the calculation of the instantaneous powers of the zero sequence. Justifies the necessity of replacement of obsolete zero-sequence current transformers with modern ones for designing modern centralized earth fault protection.

  • Failure of service aged 230 kV current transformers

    As of the spring of 2008 Manitoba Hydro had in service up to 39 current transformers rated 230 kV from a particular supplier. These had been manufactured in 1969, 1971 and 1975. Three failed explosively beginning in the summer of 2008. Dissolved gas-in-oil analysis revealed others with significant fault gas. As of the end of 2011 all remaining 230 kV current transformers of this type had been removed from service. The paper reviews the design, transport, service conditions and age which may have contributed to the high failure rate.

  • Correlation between hot-spot temperature and aging factor of oil-immersed current transformers

    Effect of a variable and continuous load on top-oil (TOT) and hot-spot (HST) temperature rise and in turn, on aging of mineral-oil-immersed transformers has been well studied. Detailed loading procedures covered in relevant IEEE Standard serve utilities manage critical assets in the form of power and distribution transformers. Current transformers (CT) have neither been specifically addressed nor independently studied. Due to a significantly different electromechanical design and in particular lower volume of oil, it is necessary to check the thermal characteristics of a CT against existing general guidelines. A state-of-the-art technology using optical fibers was employed for direct measurement of HST at various load profiles. Results indicate a significant difference between HST reference value in standards and the experimentally obtained value for CTs. Moreover, accelerated aging factors for CTs appear to be different from those calculated by using the standards for power and distribution transformers.

  • Impacts of Superconducting Cables on the Dynamic Response of Current Transformers and Protective Relaying Devices

    Replacing conventional ac transmission lines with superconducting cables provides performance advantages since superconducting cables have lower series inductance and very low ac resistance. However, the very low resistance will also have an impact on the dynamic response of current transformers (CTs) and on the response of protective relays that process their current measurements. Whenever a short circuit occurs on an ac power system the resulting current will have both fundamental frequency ac response and a decaying dc offset. The amplitude of the dc offset is dependent on the point on the ac voltage wave where the fault occurs, which is random. The rate of this decay depends on the R-L time constant of the ac circuit involved in the current path. A larger time constant increases the odds that a CT will enter saturation. Superconducting cables will increase the R-L time constant, and potentially increase the severity of CT saturation, creating error in the secondary current used by the protective relays. For many protection functions this error will delay the protective action, but in a few cases it may cause circuit breakers to trip in error. This paper will model a sample system with differing levels of penetration of superconducting cables and look at the impact of the superconducting cables on the dynamic CT response and on different protective relay functions and discuss potential solutions.

  • Online partial discharge detection in HV cables using conventional current transformers

    This paper investigates the performance of conventional current transformer for online partial discharge detection in high voltage cables. It is based on the frequency response of such current transformers. The frequency behaviour was investigated using a simulation package (Powersim) by varying parameters including core permeability, stray capacitance, core material etc. Experimental investigation was also conducted on a 33 KV 200/5A current transformer. Simulation and experimental results are presented and compared in this paper.

  • A nonlinear model for the estimation of the primary current in current transformers

    The measurement of the current in industrial electrical devices is often carried out by resorting to the use of current transformers. The reliability of these devices is compromised when the measured current is higher than the nominal value, due to the saturation and hysteresis effects of the magnetic core. In this paper, a nonlinear model of the current transformer is identified by means of a separable least squares technique. This model is successfully employed for the estimation of the primary current starting from experimental measures of the distorted current.

  • High frequency modeling of protection / measurement current transformers for partial discharge detection

    This paper investigates the choice of using preinstalled protection and measurement current transformers (CTs) for the detection of high frequency partial discharge (PD) signals in medium voltage cables by conducting frequency response analysis (FRA) of these CTs and by frequency response modeling. Researchers have developed many high frequency models, mainly for the transient behavior of CTs. While the energy of the high frequency signals in these models is very high, the energy content associated with PDs is very low. The transformer core behavior will be different in both cases and, as far as the authors could ascertain, there is little information on the FRA of such CTs for low energy high frequency input. A high frequency model of the current transformer is presented. The Jiles-Atherton model is used to analyse the behavior of the CT core in a high frequency partial discharge environment. A method for obtaining model parameters such as parasitic capacitances, leakage inductance, winding resistance, and iron loss component is proposed.



Standards related to Current Transformers

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Guide for Grounding of Instrument Transformer Secondary Circuits and Cases

The scope of the guide includes the grounding practices presently used and the practices that were not previously reported. Specifically, the issue of the grounding of cases of electronic transducers is addressed.


IEEE Guide for Field Testing of Relaying Current Transformers

The scope of this guide is to describe field test methods that assure current transformers (CTs) are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after being in service for a period of time. Annex A describes wiring integrity checks, uses of test jacks and current shorting switch, ...


IEEE Guide for Protecting Power Transformers

The scope of this guide includes general philosophy, practical applications, and economic considerations involved in power transformer protection. Emphasis is placed on practical applications. General philosophy and economic considerations in protecting transformers are reviewed. Types of faults in transformers are described. Technical problems with the protection systems, including the behavior of current transformers (CTs) during system faults, are discussed. Associated ...


IEEE Guide for the Application of Current Transformers Used for Protective Relaying Purposes

This guide describes the characteristics and classification of current transformers (CTs) used for protective relaying. It also describes the conditions that cause the CT output to be distorted and the effects on relaying systems of this distortion. The selection and application of CTs for the more common protection schemes are also addressed.


IEEE Recommended Practice for Testing Electronics Transformers and Inductors

This recommended practice presents a number of tests for use in determining the significant parameters and performance characteristics of electronics transformers and inductors. These tests are designed primarily for transformers and inductors used in all types of electronic applications, but they may apply to the other types of transformers of large apparent-power rating used in the electric power utility industry. ...


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