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IEEE 2956-2023

$37.38

IEEE Standard for Test Method for Surface Transfer Impedance of the Shielded Power Cables and Connectors for Rail Vehicles (Approved Draft)

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IEEE 2023
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New IEEE Standard – Active. Uniform measurement procedures and technology are provided for determining the shielding effectiveness of shielded power cables and connectors for rail vehicles at frequencies from 9 kHz to 30 MHz (which can be extended according to the length of the device under test). The test methods include triaxial method and tube-in-tube method. These methods determine the shielding effectiveness by applying specified current and voltage to the screen of the cable and measuring the induced voltage in order to determine the surface transfer impedance.

PDF Catalog

PDF Pages PDF Title
1 IEEE Std 2956™-2023 Front cover
2 Title page
4 Important Notices and Disclaimers Concerning IEEE Standards Documents
8 Participants
10 Introduction
11 Contents
12 1. Overview
1.1 Scope
1.2 Purpose
1.3 Application
1.4 Word usage
13 2. Normative references
3. Definitions, acronyms, and abbreviations
3.1 Definitions
14 4. Test method for measuring surface transfer impedance
4.1 General
15 4.2 Test equipment
16 4.3 Test sample preparation
19 4.4 Test set-up
21 4.5 Calibration procedure
23 4.6 Measuring procedure
4.7 Surface transfer impedance calculation
25 5. Test report
5.1 General
5.2 Test equipment information
5.3 Test sample parameters
5.4 Schematic diagram of test set-up
26 5.5 Test results
27 Annex A (informative) Theoretical background of the triaxial method
A.1 Feasibility of triaxial method
28 A.2 Relationship between surface transfer impedance and screening effectiveness in triaxial method
34 Annex B (informative) Cut-off frequency of measurement
B.1 Equivalent circuit
B.2 Coupling equations
36 B.3 The relationship between coupling length and cut-off frequency
39 Annex C (informative) Conversion of scattering parameter to surface transfer impedance
C.1 Scattering parameter
42 C.2 Triaxial test set-up depicted as two-port network
44 Annex D (informative) Test results of surface transfer impedance
48 Annex E (informative) Bibliography
49 Back cover
IEEE 2956-2023
$37.38