BS EN 60885-3-2015 Electrical test methods for electric cables Test methods for partial discharge measurements on lengths of extruded power cables《电缆的电气试验方法 测量挤压电力电缆段局部放电的试验方法》.pdf

1、BSI Standards PublicationElectrical test methods for electric cablesPart 3: Test methods for partial discharge measurements on lengths of extruded power cablesBS EN 60885-3:2015National forewordThis British Standard is the UK implementation of EN 60885-3:2015. It isidentical to IEC 60885-3:2015. It

2、supersedes BS EN 60885-3:2003, which willbe withdrawn on 14 May 2018.The UK participation in its preparation was entrusted by TechnicalCommittee GEL/20, Electric cables, to Subcommittee GEL/20/16, ElectricCables Medium/high voltage.A list of organizations represented on this committee can be obtaine

3、d onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 77690 8ICS 29.060.20Compliance with a B

4、ritish Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60885-3:2015EUROPEAN STANDARDNORME

5、EUROPENNEEUROPISCHE NORMEN 60885-3 May 2015 ICS 29.060.20 Supersedes EN 60885-3:2003 English Version Electrical test methods for electric cables - Part 3: Test methods for partial discharge measurements on lengths of extrudedpower cables (IEC 60885-3:2015) Mthodes dessais lectriques pour les cbles l

6、ectriques -Partie 3: Mthodes dessais pour la mesure des dcharges partielles sur des longueurs de cbles de puissanceextruds (IEC 60885-3:2015) Elektrische Prfverfahren fr Starkstromkabel - Teil 3:Prfverfahren zur Teilentladungsmessung an Lngen vonextrudierten Kabeln (IEC 60885-3:2015) This European S

7、tandard was approved by CENELEC on 2015-05-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical references conce

8、rning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CENELEC mem

9、ber into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republi

10、c of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,Turkey and the United Kingdom. European Committee for Electrotechnical Standardization C

11、omit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60885-3:2015 E EN 6

12、0885-3:2015 - 2 - Foreword The text of document 20/1560/FDIS, future IEC 60885-3, prepared by IEC/TC 20 “Electric cables“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60885-3:2015. The following dates are fixed: latest date by which the document has to be implemented

13、at national level by publication of an identical national standard or by endorsement (dop) 2016-02-14 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-05-14 This document supersedes EN 60885-3:2003. Attention is drawn to the possibility that s

14、ome of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60885-3:2015 was approved by CENELEC as a European Standard without

15、any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60060-1 NOTE Harmonized as EN 60060-1. BS EN 60885-3:2015- 3 - EN 60885-3:2015 Annex ZA (normative) Normative references to international publications with their correspond

16、ing European publications 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 document (including any am

17、endments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Ye

18、ar Title EN/HD Year IEC 60270 2000 High-voltage test techniques - Partial discharge measurements EN 60270 2001 BS EN 60885-3:2015 2 IEC 60885-3:2015 IEC 2015 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms, definitions and symbols 6 3.1 Terms and definitions 6 3.2 Symbols used in F

19、igures 1 to 14 6 4 Overview . 7 4.1 General . 7 4.2 Object . 7 4.3 Problem of superposition of travelling waves for long lengths . 7 5 Partial discharge tests . 10 5.1 Test apparatus 10 5.1.1 Equipment . 10 5.1.2 Test circuit and instruments 10 5.1.3 Double pulse generator 10 5.1.4 Terminal impedanc

20、e . 10 5.1.5 Reflection suppressor 10 5.2 Setting up the test circuit . 10 5.2.1 Determination of characteristic properties of the test circuit . 10 5.2.2 Terminal impedance . 10 5.2.3 Determination of superposition of travelling waves 11 5.2.4 Reflection suppressor 11 5.2.5 Calibration of the measu

21、ring system in the complete test circuit 11 5.2.6 Sensitivity 11 5.3 Measurement procedures 11 5.3.1 General . 11 5.3.2 Short cable lengths including type test lengths 12 5.3.3 Long cable lengths tested without a terminal impedance . 12 5.3.4 Long cable lengths tested with a terminal impedance 13 5.

22、3.5 Long cable lengths tested with a reflection suppressor 14 5.4 Voltage levels/partial discharge limits 15 5.5 Double pulse behaviour and plotting the double pulse diagram . 15 5.6 Requirements for the terminal impedance 16 5.6.1 General . 16 5.6.2 RC element 16 5.6.3 RLC element series resonance

23、circuit . 17 Bibliography . 21 Figure 1 Discharge site exactly at the cable end remote from the detector (x = l) . 7 Figure 2 Discharge site at a distance x = x1 Travelling waves 8 Figure 3 Attenuation of PD pulses along the cable 8 Figure 4 Superposition and attenuation of PD pulses 9 Figure 5 Inpu

24、t unit ZAconnected in series with the coupling capacitor, CK17 Figure 6 Input unit ZAconnected in series with the cable, Cx18 Figure 7 Bridge circuit 18 BS EN 60885-3:2015IEC 60885-3:2015 IEC 2015 3 Figure 8 Connection of the terminal impedance Zw. 18 Figure 9 Connection of the reflection suppressor

25、, RS 19 Figure 10 Connection of the double pulse generator into the measuring circuit in Figure 5 19 Figure 11 Double pulse diagram type 1 without negative superposition 19 Figure 12 Double pulse diagram type 2 with negative superposition between t1and t2. 20 Figure 13 Double pulse diagram type 3 wi

26、th negative and positive superpositions between t1and t2. 20 Figure 14 Connection of the double pulse generator for the test circuit in Figure 9 with the reflection suppressor 20 BS EN 60885-3:2015 4 IEC 60885-3:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL TEST METHODS FOR EL

27、ECTRIC CABLES Part 3: Test methods for partial discharge measurements on lengths of extruded power cables FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The

28、 object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifi

29、cations (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations l

30、iaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters exp

31、ress, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Commi

32、ttees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC Nation

33、al Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does n

34、ot provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have

35、the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoev

36、er, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publicatio

37、ns is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard

38、 IEC 60885-3 has been prepared by IEC technical committee 20: Electric cables. This second edition of IEC 60885-3 cancels and replaces the first edition, published in 1988 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the prev

39、ious edition: The definition of sensitivity as twice the background noise level has been removed and replaced by a practical assessment of sensitivity based on the minimum level of detectable discharge. References to measurements of pulse heights in mm on an oscilloscope have been replaced by measur

40、ements of partial discharge magnitude in pC. BS EN 60885-3:2015IEC 60885-3:2015 IEC 2015 5 The order of the clauses has been revised in line with the general numbering scheme of IEC standards and to provide clarity in order to facilitate its practical use. Section 3 of the first edition (Application

41、 guide) has been removed as it is considered that background information is better obtained from the original references as listed in the bibliography. The text of this standard is based on the following documents: FDIS Report on voting 20/1560/FDIS 20/1587/RVD Full information on the voting for the

42、 approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60885 series, published under the general title Electrical test methods for electric cable

43、s, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfi

44、rmed, withdrawn, replaced by a revised edition, or amended. BS EN 60885-3:2015 6 IEC 60885-3:2015 IEC 2015 ELECTRICAL TEST METHODS FOR ELECTRIC CABLES Part 3: Test methods for partial discharge measurements on lengths of extruded power cables 1 Scope This part of IEC 60885 specifies the test methods

45、 for partial discharge (PD) measurements on lengths of extruded power cable, but does not include measurements made on installed cable systems. Reference is made to IEC 60270 which gives the techniques and considerations applicable to partial discharge measurements in general. 2 Normative references

46、 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 document (including any amendments) applies. IEC 60

47、270:2000, High-voltage test techniques Partial discharge measurements 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60270 apply. 3.2 Symbols used in Figures 1 to 14 a1discharge magnitude measured with the calibrat

48、or at the end near to the detector a2 discharge magnitude measured with the calibrator at the end remote from the detector Ccal calibrator CK coupling capacitor Cx power cable D detector I double pulse generator l length of the power cable M coaxial signal cable Q discharge magnitude R1R2 matching r

49、esistors RS reflection suppressor v propagation velocity of partial discharge V voltage indicator W power supply BS EN 60885-3:2015IEC 60885-3:2015 IEC 2015 7 Z impedance/filter ZAinput unit ZW terminal impedance 4 Overview 4.1 General Partial discharge measurements shall be carried out using the test techniques specified in IEC 60270. 4.2 Object The object of the test is to determine the discharge magnitude, or to check that the discharge magnitude does no