1、s g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58The European Standard EN 50395:2005 has the status of a British StandardICS 29.060.20Electrical te
2、st methodfor low voltage energycables BRITISH STANDARDBS EN 50395:2005BS EN 50395:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 November 2005 BSI 14 November 2005ISBN 0 580 46737 6request to its secretary.Cross-referencesThe British
3、Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.
4、This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside fro
5、nt cover, the EN title page, pages 2 to 14, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this subcommittee can be o
6、btained on present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard is the off
7、icial English language version of EN 50395:2005.The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/17, Low voltage cables, which has the responsibility to: aid enquirers to understand the text;EUROPEAN STANDARD EN 50395 NORME
8、EUROPENNE EUROPISCHE NORM August 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation
9、in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50395:2005 E ICS 29.060.20 Partly supersedes HD 21.2 S3:1997 + A1:2002 & HD 22.2 S3:1997 + A1:2002English version Electrical test methods for low voltage energy cables Mthodes dessais lectriques pour les cbles dnergie b
10、asse tension Elektrische Prfverfahren fr Niederspannungskabel und -leitungenThis European Standard was approved by CENELEC on 2005-07-01. 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 nat
11、ional standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version
12、in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic,
13、 Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 50395:2005 2 Foreword This European Standard was prepared by the T
14、echnical Committee CENELEC TC 20, Electric cables. In accordance with the decision of TC 20 at its Setubal meeting (June 2004), the text of the draft was submitted to the formal vote. It was approved by CENELEC as EN 50395 on 2005-07-01. This European Standard, together with EN 50396:2005, supersede
15、s HD 21.2 S3:1997 + A1:2002 and HD 22.2 S3:1997 + A1:2002. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-07-01 latest date by which the national standards conflicting w
16、ith the EN have to be withdrawn (dow) 2008-07-01 _ 3 EN 50395:2005 Contents Page Introduction.5 1 Scope.5 2 Normative references.5 3 General requirements .6 3.1 Pre-conditioning.6 3.2 Test temperature .6 3.3 Test voltage .6 3.4 Test values .6 4 Definitions.6 5 Electrical d.c. resistance of conductor
17、 .6 6 Voltage test on completed cable .6 7 Voltage test on cores in water .7 7.1 Test sample .7 7.2 Procedure .7 7.3 Requirement .7 8 Insulation resistance test .7 8.1 Insulation resistance for cables having maximum conductor temperatures not exceeding 90 C .7 8.1.1 Test sample .7 8.1.2 Procedure .8
18、 8.1.3 Requirement .8 8.2 Insulation resistance for cables with maximum conductor temperatures exceeding 90 C .8 8.2.1 Test sample .8 8.2.2 Procedure .8 8.2.3 Requirement .8 9 Long term resistance of insulation to d.c.9 9.1 Test sample .9 9.2 Procedure .9 9.3 Requirement .10 10 Check for the absence
19、 of faults in insulation .10 10.1 General.10 10.2 Spark test.10 10.2.1 Procedure .10 10.2.2 Requirement .10 10.3 Voltage test.10 10.3.1 Procedure .10 EN 50395:2005 4 10.3.2 Requirement .10 11 Surface resistance of sheath .11 11.1 Test samples .11 11.2 Procedure .11 11.3 Requirement .11 12 Transfer i
20、mpedance .11 Annex A .12 A.1 Basic formula.12 A.2 Rounding .12 A.3 Examples of calculation.12 Annex B (informative) Source of electrical test methods in EN 50395.13 Bibliography.14 Figure 1 Positioning of electrodes .9 5 EN 50395:2005 Introduction EN 50395 contains the electrical test methods that a
21、re used for harmonized low voltage energy cables. These electrical test methods include all those previously contained in HD 21 and HD 22. Annex B gives a comparison between the original location of each test method and its place in this new European Standard. The content of EN 50395 is not, and wil
22、l not be, restricted only to test methods for cables to HD 21 and HD 22. Other test methods for harmonized LV cables may be included. Furthermore, the use of test methods in EN 50395 for cables outside HD 21 and HD 22 is not prohibited, but it is strongly recommended that expert advice be taken befo
23、re such use, or before any proposal for incorporation into another standard. 1 Scope EN 50395 contains electrical test methods required for the testing of harmonized low voltage energy cables, especially those rated at up to and including 450/750 V. NOTE 1 A description of the origin of these test m
24、ethods and the background to this European Standard is given in the Introduction and in Annex B. The particular cable standard dictates the tests which need to be performed on the relevant cable type. It also specifies whether the specific test is a type test (T), a sample test (S) or a routine test
25、 (R) for the particular cable type. NOTE 2 T, S and R are defined in the relevant cable standard. The requirements to be met during or after the test are specified for the particular cable type in the relevant cable standard. However, some test requirements are obvious and universal, such as the fac
26、t that no breakdown shall occur during voltage tests, and these are stated in the particular test method. Test methods for use specifically in utility power cables are not covered by this European Standard. They can be found in HD 605. Test methods for use specifically in communications cables are t
27、he responsibility of the Technical Committee CENELEC TC 46X, Communication cables. At present such test methods are given in EN 50289 series. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
28、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50289-1-6 2002 Communication cables Specifications for test methods - Part 1-6: Electrical test methods Electromagnetic performance EN 50356 2002 Method for spark testing of cables
29、EN 60228 2005 Conductors of insulated cables EN 50395:2005 6 3 General requirements 3.1 Pre-conditioning All the tests shall be carried out not less than 16 h after the extrusion or cross-linking, if any, of the insulating or sheathing compounds. 3.2 Test temperature Unless otherwise specified, test
30、s shall be made at an ambient temperature of (20 15) C. 3.3 Test voltage Unless otherwise specified in the individual clause of this European Standard or in the product standard, the test voltage shall be a.c. of approximately sine-wave form and of frequency between 49 Hz and 61 Hz. The ratio of pea
31、k value to r.m.s. value shall be equal to 2 with a tolerance of 7 %. The values quoted are r.m.s. values. 3.4 Test values Full test conditions (such as temperatures, durations, etc.) and full test requirements are not specified in this European Standard; it is intended that they should be specified by the standard dealing with the relevant type of cable. Any test requirements which are
