1、BSI Standards PublicationCoaxial communication cablesPart 1114. Electrical test methods Test for inductanceBS IEC 61196-1-114:2015National forewordThis British Standard is the UK implementation of IEC 61196-1-114:2015.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/46
2、, Cables, wires and waveguides, radio frequency connectors and accessories for communication and signalling.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users a
3、re responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 91936 7ICS 33.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theS
4、tandards Policy and Strategy Committee on 31 October 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS IEC 61196-1-114:2015IEC 61196-1-114 Edition 1.0 2015-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Coaxial communication cables Part 1-114: Electrical test me
5、thods Test for inductance Cbles coaxiaux de communication Partie 1-114: Mthodes dessais lectriques Essai dinductance INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 33.120.10 ISBN 978-2-8322-2935-4 Registered trademark of the International Electrotechnical Co
6、mmission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. BS IEC 61196-1-114:2015 2 IEC 61196-1-114:2015
7、 IEC 2015 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references . 5 3 Terms and definitions. 5 4 Procedure 6 4.1 Equipment . 6 4.2 Test sample 6 4.3 Calibration 6 4.4 Test set-up 6 4.5 Measuring procedure . 6 5 Expression of test results . 6 6 Test report . 7 BS IEC 61196-1-114:2015 4 IEC 61196-1-1
8、14:2015 IEC 2015 This standard is intended to be read in conjunction with IEC 61196-1. It is based on the second edition (2005) of that standard. A list of all the parts in the IEC 61196 series published under the general title Coaxial communication cables can be found on the IEC website. The commit
9、tee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised editio
10、n, or amended. BS IEC 61196-1-114:2015IEC 61196-1-114:2015 IEC 2015 5 COAXIAL COMMUNICATION CABLES Part 1-114: Electrical test methods Test for inductance 1 Scope This part of IEC 61196 details the test methods to determine the inductance characteristics of coaxial cables used in analogue and digita
11、l communication systems. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docu
12、ment (including any amendments) applies. IEC 61196-1, Coaxial communication cables Part 1: Generic specification General, definitions and requirements IEC 61196-1-101, Coaxial communication cables Part 1-101: Electrical test methods Test for conductor d.c. resistance of cable 3 Terms and definitions
13、 For the purposes of this document, the terms and definitions given in IEC 61196-1 as well as the following apply. 3.1 inductance effective inductance (L) of the cable as the sum of the inductances of the inner conductor, the outer conductor and the mutual inductance between the two conductors Note
14、1 to entry: At any (low) frequency, the impedance of a cable can be represented by two components resistance (R) and reactance (X) or as a polar function having magnitude (Z) and phase (). The impedance shall be represented by a series circuit: R = Z cos () and X = Z sin () where Z = (R2+ X2); tan (
15、) = X/R; X = 2fL. Note 2 to entry: Inductances normally are measured at low frequencies (f) (50 Hz, 800 Hz or 1 000 Hz) as required in the relevant cable specification. For this case, the DC resistance (R) shall be measured as described in IEC 61196-1-101. R is the DC-resistance of the inner and out
16、er conductor (= loop resistance). BS IEC 61196-1-114:2015 6 IEC 61196-1-114:2015 IEC 2015 4 Procedure 4.1 Equipment The measurements can be performed using an impedance analyser (or alternatively a discrete signal generator and receiver), an LCR-meter or an impedance-measuring-bridge (Wheatstone-, M
17、axwell-Bridge). Accuracy of measuring equipment should be less than or equal to 2 %. 4.2 Test sample The test sample shall be straightened and have a length of 10 m up to 100 m. The test may be performed at a delivery length, if the attenuation of the cable is small enough, but less than 1/20 of the
18、 wave length of the test signal for measurement with higher frequencies. 4.3 Calibration The influence of the connecting cables, used for connection of the CUT to the equipment, shall be measured at the relevant frequency. The calibration of the test set-up with the impedance analyser shall be done
19、under open, short and load conditions. The measurements shall be done over the whole specified frequency range. The calibration data shall be saved, so that the results may be corrected. 4.4 Test set-up The input impedance Z of the CUT shall be measured with the impedance analyser with a short circu
20、it at the far end of the end of the CUT. 4.5 Measuring procedure The test sample shall be connected to the terminals of the measuring devices and the impedance Z shall be measured with a short circuit at the far end of the CUT. Impedance analysers or LCR-meters will show the value of inductance dire
21、ctly. In other cases, the equation given in 3.1 can be used to calculate the inductance with other instrumentation. 5 Expression of test results The test results shall be normalized to the reference length of 1 km. L = (Lm/Length) 1 000 (mH/km) where L is the inductance of reference length; Lmis the
22、 measured inductance in millihenrys; Length is the length of sample in metres. BS IEC 61196-1-114:2015IEC 61196-1-114:2015 IEC 2015 7 6 Test report The test report shall give the test conditions: temperature, test frequency, sample length, normalized values for the reference length. type equipment u
23、sed and record the corrected values for the reference length. _ BS IEC 61196-1-114:2015This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. Britis
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