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The shielding factor of underground cable sheaths
Proceedings of the IEE - Part II: Power Engineering, 1953The shielding factor of a cable buried in the ground has been investigated, and it is shown that it may be considered in terms of three components. The first of these depends on the sheath construction only, and is the factor normally considered for high-frequency shielding.
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Lightning Shielding of Plastic Telephone Cable
IEEE Transactions on Communications, 1970Data are presented on the surge characteristics of various types and combinations of metals when applied as a shield for buried telephone cables. Surge currents were applied to the shield of 500-foot lengths of cable and the potentials developed between the shield and conductors were measured at selected points along the cable length in order to ...
E. Fisher, E. Robinson, W. Bishop
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Electromagnetic shielding of high-voltage cables
Journal of Magnetism and Magnetic Materials, 2007Abstract The electromagnetic shielding of high-voltage (HV) cables has been studied both by numerical computations and by experiments performed in real-life practical situations. Two shield topologies have been considered, i.e. open- versus closed-shield configurations.
S Jacobs +6 more
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Medium voltage cable shielding and grounding
Conference Record of Annual Pulp and Paper Industry Technical Conference, 2003The authors describe the purposes of the shields (conductor shield, insulation shield, and metal shield) in medium-voltage cables. Shield losses, shield grounding, and shield terminations are also discussed. It is noted that, in essence, the conductor shield is an electrical extension of the conductor and the insulation shield is an electrical ...
O. Willis, R. Schoolcraft, H.C. Doepken
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Hole inductance in braided cable shields
2015 IEEE International Symposium on Electromagnetic Compatibility (EMC), 2015The shielding effectiveness of metal braids of cables is governed by the geometry and the materials of the braid. The shielding effectiveness can be characterised by the transfer impedance of the metal braid. Analytical models for the transfer impedance contain in general two components, one representing diffusion of electromagnetic energy through the ...
H. Schippers, J. Verpoorte
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Measuring the coupling parameters of shielded cables [PDF]
IEEE Transactions on Electromagnetic Compatibility, 1993 Methods for measuring the coupling parameters of shielded cables, transfer impedance, and transfer admittance are presented. In addition to a theoretical analysis, a simple easy-to-use low-cost measuring setup is shown. This setup permits the determination of modulus and phase of the coupling parameters.
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Analysis of the Shielding Characteristics of Saturable Ferromagnetic Cable Shields
IEEE Transactions on Electromagnetic Compatibility, 1970A numerical technique is developed that may be used to analyze the shielding characteristics of a cable with a saturable ferromagnetic outer sheath in an intense low-frequency environment. The solution relates the center conductor current to the total current exciting a coaxial cable with a ferromagnetic sheath. Several examples are given to illustrate
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Optimized single-braided cable shields
IEEE Transactions on Electromagnetic Compatibility, 1993Approximate formulas for the coupling parameters of cables with single-braided shields are presented. The derivation of the formulas is based on a qualitative analysis of the coupling mechanisms; these qualitative approaches have been verified and adjusted to reality by measuring many different braids.
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Measure of the Shielding Effectiveness in Coaxial Cables
2010The coaxial cables' shielding effectiveness is an important parameter to guarantee the electromagnetic compatibility of the electro-electronic systems. This concern involves the signal quality in the cable and the correct functioning of the nearby equipments.
Leonardo Alvarenga Lopes Santos +5 more
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Cable Shielding Performance and CW Response
IEEE Transactions on Electromagnetic Compatibility, 1973We show that the reference for the measurement of the shielding performance of a cable sheath should be the sheath current. However, unless the phase length of the cable is short, the response at the ends of the line will be sensitive to frequency even if the sheath current is uniform, and the coaxial line formed by the core wires and the sheath is ...
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