NDLI: New Testing Method of the Shielding Effect of Heavy Current Transformer With Shielding Coils

Content Provider	IEEE Xplore Digital Library
Author	Kaifeng Qu Wei Zhao Bo Jiang Songling Huang Peng Yang
Copyright Year	1963
Abstract	So far, there has not been any method that is both effective and accurate enough to test the performance of a heavy current transformer (HCT) under electromagnetic interference from adjacent bus-bars since the primary and adjacent currents are too high to reproduce in a laboratory. A new testing method termed as the “multiple-coil testing method” is presented in this paper to overcome this difficulty. By closely enwinding two coils that are connected in opposed-polarity series on the HCT, the original magnetic field in the core produced by a single external current source can more accurately be simulated. Thus, the performance of the HCT under working conditions can equivalently be tested in a laboratory. By using two pairs of such coils, which are positioned at right angles to the other pair and work independently, this method can simulate the magnetic field from multiple external current sources positioned in arbitrary manner and consequently test the performance of the HCT under electromagnetic interference from multiple current sources. This new method is both accurate and effective, and easy to implement. It can be applied to overcome the testing difficulty of an HCT in a laboratory, which particularly has shielding coils.
Sponsorship	IEEE Instrumentation and Measurement Society Bureau international des poids et mesures IEEE International Bureau of Weights and Measures (BIPM) URSI NBS Agency Ind. Sci. & Technol., Min. Int. Trade & Ind. Sci. Council Japan International Union of Pure and Applied Physics (IUPAP) NIST NRCC National Conference of Standards Laboratories (NCSL) Allen Osborne Associates Andeen-Hagerling, Inc. Ballantine Lab. Inc. Clarke-Hess Communications Research Corp. Fluke Corporation Guildline Instruments Hewlett-Packard Co. Julie Res. Lab. Inc. Keithley Instruments, Inc. Measurements International Ltd. Canada QuadTech Inc. Quantum Design Inc. Rotek Instrum. Corp. Tegam Inc. Tektronix Inc
Starting Page	839
Ending Page	845
Page Count	7
File Size	679986
File Format	PDF
ISSN	00189456
Volume Number	60
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing Coils Magnetic cores Magnetic shielding Magnetic noise Finite element methods Iron testing Electromagnetic measurements electromagnetic shielding heavy current transformer (HCT) multiple-coil testing method shielding coils
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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