1、BRITISH STANDARD Communication cables - Specifications for test methods - Part 1-4: Electrical test methods - Insulation resistance The European Standard EN 50289-1-4:2001 has the status of a British Standard ICs 33.120.10 BS EN 50 289-1-4:ZOO 1 O NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTE
2、D BY COPYRIGHT LAW BS EN 50289-1-4:2001 Amd.No. Date National foreword Comments This British Standard is the official English knguage version of The UK participation in its preparation was entrusted by Technical Committee EPU46, Cables, wire and waveguides, RF connectors, and accessories for communi
3、cation and signalling, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: EN 50289-1-412001. - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests i
4、nformed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referr
5、ed to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a con
6、tract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under
7、 the authority of the Standards Committee and comes into effect on 15 September 2001 O BSI 08-2001 ISBN O 580 38229 X Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright date displaye
8、d in this document indicates when the document was last issued. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50289414 June 2001 ICs 33.120.20 English version Communication cables - Specifications for test methods Part 1-4: Electrical test methods - Insulation resistance Cbles de communicatio
9、n - Spcifications des mthodes dessai Partie 1-4: Mthodes dessais lectriques - Rsistance disolement Isolationswiderstand Kommuni kationskabel - Spezifikationen fr Prfverfahren Teil 1-4: Elektrische Prfverfahren - . This European Standard was approved by CENELEC on 2001-03-01. CENELEC members are boun
10、d to comply with the CENKENELEC 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 concerning such national standards may be obtained on application to the Cen
11、tral Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version 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 s
12、tatus as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC Euro
13、pean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
14、for CENELEC members. Ref. No. EN 50289-1-4:2001 E EN 50289-1-4:2001 -2- Foreword 8 This European Standard was prepared by SC 46XC, Multicore, Multipair and Quad Data communication cables, of Technical Committee CENELEC TC 46X, Communication cables. The text of the draft was submitted to the formal v
15、ote and was approved by CENELEC as EN 50289-1-4 on 2001-03-01. 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) 2002-04-01 - latest date by which the national standards confl
16、icting with the EN have to be withdrawn (dow) 2004-04-01 O This European Standard has been prepared under the European Mandate M/212 given to CENELEC by the European Commission and the European Free Trade Association. -3- EN 50289-1-4:2001 Contents Foreword 1 1 Scope 4 2 Normative references 4 3 Def
17、initions . 4 4 Test method . 5 4.1 Equipment 5 4.2 Test sample 5 4.3 Procedure . 5 4.3.1 Core test 5 4.3.2 Group test 5 4.3.3 Coaxial cables 5 5 Expression of test results 6 6 Test report . 6 EN 50289-1-42001 -4- 1 Scope Part 1-4 of EN 50289 details the test methods to determine the insulation resis
18、tance of the finished cables used in analogue and digital communication systems. It is to be read in conjunction with Part 1-1 of EN 50289, which contains essential provisions for its application. 2 Normative references This European Standard incorporates by dated or undated reference, provisions fr
19、om other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendm
20、ent or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 50289-1-1 2001 Communication cables - Specifications for tests methods - Part 1-1 : Electrical test methods - General requirements EN 50290-1-2 - Communication cables - Part 1
21、-2: Definitions 3 Definitions For the purposes of this European Standard, the definitions given in EN 50290-1-2 apply in addition to the following ones. 3.1 group test the group test for multi-element cables (if applicable) is the test between two specified groups of conductors each of which has a/
22、ifs conductors connected together : A Figure I - Starquads Figure 2 - Pairs -5- Table 1 Group I Group II EN 50289-1-4:2001 Wires A Wires A,C Wires B Wires B,D I I Pairs I Starquads I 4 Test method 4.1 Equipment The test equipment shall have a suitable minimum range - typically 2 x IO5 Mi2 and shall
23、provide the voltage as specified in the relevant specification. 4.2 Test sample In general the test is performed on a delivery length. Both ends of the cable under test (CUT) 0 shall be prepared such that, when the specified voltage is applied to the conductor/screen under test, there shall be no br
24、eakdown or significant partial discharges at the terminations. 4.3 Procedure The test shall be carried out on the CUT after continuity or the conductor resistance test. The measurement shall be carried out on complete lengths of the finished cable at a temperature specified in the relevant cable sta
25、ndard. The insulation resistance shall be measured as a core test or a group test. The test shall be performed by applying a DC voltage between 80 V and 500 V for a minimum duration of one minute unless otherwise specified in the relevant cable specification. 4.3.1 Core test The core test is carried
26、 out by application of the test voltage between each conductor and all others plus the screen (if any) connected to earth. 0 4.3.2 Group test The group test (if applicable) is carried out by application of the test voltage between each group and all other groups plus screen (if any) earthed. 4.3.3 C
27、oaxial cables The CUT shall be connected to the test equipment as follows : Inner conductor against outer conductor, outer conductor earthed except for armoured cables. EN 50289-1-4:2001 -6- 5 Expression of test results The test results shall be normalized to the reference length of 1 km. Rm Ri=-xL
28、1 O00 (MRokm) where Ri = insulation resistance of reference length Rm = measured resistance, in MR, of CUT = length of sample in m 6 Test report The test report shall include: - temperature, - sample length, - test voltage, - duration, - the insulation resistance for the reference length derived fro
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