1、BRITISH STANDARDBS EN 50397-1:2006Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. Part 1: Covered conductorsThe European Standard EN 50397-1:2006 has the status of a British StandardICS 29.240.20g49g50g3g38g50g51g60g44
2、g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 50397-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on
3、 31 January 2007 BSI 2007ISBN 978-0-580-49924-1National forewordThis British Standard was published by BSI. It is the UK implementation of EN 50397-1:2006.The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/16, Medium/high volt
4、age cables.A list of organizations represented on GEL/20/16 can be obtained on request to its secretary.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 cannot confer immunity
5、 from legal obligations. Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 50397-1 NORME EUROPENNE EUROPISCHE NORM November 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrot
6、echnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50397-1:2006 E ICS 29.240.20 English version Covered conductors for overhead lines and the related a
7、ccessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. Part 1: Covered conductors Conducteurs gains pour lignes ariennes et accessoires associs pour des tensions assignes suprieures 1 kV c.a. et ne dpassant pas 36 kV c.a. Partie 1: Conducteurs gains Kunststoffumhllte Leiter und z
8、ugehrige Armaturen fr Freileitungen mit Nennspannungen ber 1 kV und nicht mehr als 36 kV Wechselspannung Teil 1: Kunststoffumhllte FreileitungsseileThis European Standard was approved by CENELEC on 2006-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipul
9、ate 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 Central Secretariat or to any CENELEC member. This European Standard
10、 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 status as the official versions. CENELEC members are the national
11、electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland
12、and the United Kingdom. EN 50397-1:2006 2 Foreword This European Standard was prepared by TF “Covered Overhead Line Conductors (COHL)” of the Technical Committee CENELEC TC 20, Electric cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50397-1 on 2006-0
13、7-01. 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) 2007-07-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-07-01
14、This European Standard consists of two parts: Part 1 “Covered conductors“; and Part 2 “Accessories for covered conductors: Tests and acceptance criteria“. This standard covers the construction, performance and test requirements for covered conductors for overhead lines having a nominal voltage U abo
15、ve 1 kV a.c. up to and including 36 kV a.c., and for the related accessories. _ 3 EN 50397-1:2006 Contents Introduction.4 1 Scope .5 2 Normative references .5 3 Definitions .5 4 Covered conductors.6 4.1 Code designation 6 4.2 Construction requirements6 4.2.1 Conductor 6 4.2.2 Filling7 4.2.3 Covering
16、 7 5 Marking 9 5.1 Indication of origin .9 5.2 Continuity of marks .9 5.3 Other markings9 5.4 Durability .9 5.5 Legibility 9 6 Tests.9 Annex A (normative) Special conductors 12 Annex B (normative) Measurement of the leakage current13 Annex C (normative) Tracking resistance15 Annex D (normative) Slip
17、page test .21 EN 50397-1:2006 4 Introduction Covered conductors consist of a conductor surrounded by a covering made of insulating material as protection against accidental contacts with other covered conductors and with grounded parts such as tree branches, etc. In comparison with insulated conduct
18、ors, this covering has reduced properties, but is able to withstand the phase-to-earth voltage temporarily. Since covered conductors are unscreened, they are not touch-proof, i.e. they must be treated as bare conductors with respect to electric shock. This standard does not cover aspects related to
19、the installation of overhead lines such as determination of clearances, spans, sags, etc. 5 EN 50397-1:2006 1 Scope This Part 1 contains the requirements for covered conductors with or without integrated longitudinal watertightness and/or semi-conductive conductor screen for applications in overhead
20、 lines with rated voltages U above 1 kV a.c. and not exceeding 36 kV a.c. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenc
21、ed document (including any amendments) applies. EN 50182 Conductors for overhead lines Round wire concentric lay stranded conductors EN 50356 Method for spark testing of cables EN 60811 series Insulating and sheathing materials of electric and optical fibre cables Common test methods (IEC 60811 seri
22、es) EN 61284 Overhead lines Requirements and tests for fittings (IEC 61284) HD 380 Test methods for evaluating resistance to tracking and erosion of electrical insulating materials used under severe ambient conditions (IEC 60587) HD 605 Electric cables Additional test methods 3 Definitions For the p
23、urpose of this European Standard, the following definitions apply. 3.1 Definitions relating to tests 3.1.1 type tests (symbol T) tests required to be made before supplying a type of product covered by this European Standard on a general commercial basis in order to demonstrate satisfactory performan
24、ce characteristics to meet the intended application. These tests are of such nature that, after they have been made, they need not be repeated unless changes are made in the material, design or manufacturing process which might change the performance characteristics 3.1.2 sample tests (symbol S) tes
25、ts made on samples of completed product or components taken from the completed product adequate to verify that the finished product meets the design specifications 3.1.3 routine tests (symbol R) tests made on all production lengths to demonstrate their integrity 3.2 rated voltage the reference volta
26、ge for which the conductor is designed and which serves to define the electrical tests. The rated voltage is expressed by the value U, expressed in kilovolts, where U is the r.m.s. value between any two-phase conductors EN 50397-1:2006 6 4 Covered conductors 4.1 Code designation Covered conductors s
27、hall be designated as follows: Type code CC; Covering material S (for semi-conductive conductor screen, if any), X (for cross-linked polyethylene), T (for thermoplastic polyethylene); Conductor material and cross-section according to EN 50182; Conductor design W (for watertight), K (for compacted);
28、Rated voltage U in kV kV. EXAMPLE OF DESIGNATION “CCX 66-AL3 WK 20kV” is a XLPE-covered conductor with a rated voltage of 20 kV, longitudinal watertight compacted conductor of aluminium alloy AL3 and a nominal conductor cross-section of 66 mm. 4.2 Construction requirements 4.2.1 Conductor Number of
29、conductors: 1 Conductor material: aluminium alloy or steel reinforced aluminium Nom. cross-section: 35 mm to 240 mm (aluminium alloy), 50 mm to 150 mm (total cross-section for steel reinforced aluminium) Conductor design: the conductors may be compacted or non-compacted. Information on bare conducto
30、rs in frequent use may be found in the national lists, contained in Annex F of EN 50182. However, for the purpose of this European Standard, conductors may be selected from any national table. Conductors deviating in design from the standard values have to be given by the manufacturer, but fulfillin
31、g all requirements given in EN 50182. Non-compacted conductors shall comply with EN 50182 (with the exception of the filling, if any). For compacted conductors, based on conductors according to EN 50182, the following paragraph applies: The outer diameter of the compacted conductor shall be 95 % ( 1
32、 % for 7- and 19-wire constructions, 1,5 % for 37-wire constructions) of the diameter given in EN 50182. The rated tensile strength (RTS) shall be at least 95 % of the value given in EN 50182. The d.c. resistance shall not exceed the value given in EN 50182 by more than 5 %. Special conductors may a
33、lso be used (see Annex A). 7 EN 50397-1:2006 4.2.2 Filling The stranded conductor may be longitudinally watertight by means of adequate measures as e.g. filling with an adequate mass. The filling mass or other materials for obtaining the longitudinal watertightness, shall be compatible with the cond
34、uctor material and the material of the covering (see Table 2). 4.2.3 Covering The covering shall consist of a cross-linked polyethylene compound, which shall comply with the requirements according to Table 1, column 3 or of a thermoplastic polyethylene compound, complying with the requirements accor
35、ding Table 1, column 4. It shall be possible to remove the covering without damage to the conductor. Table 1 Properties of the covering materials 1 2 3 4 Unit Compound designation X TBasic material XLPE PE Maximum operating temperature of the conductor C 90 a70 Mechanical properties before ageing on
36、 sample (EN 60811-1-1, Subclause 9.1) minimum tensile strength MPa 12,5 12,5 minimum elongation at break % 200 300 after ageing on sample (EN 60811-1-2, Subclause 8.1, ageing method a) temperature C 135 110 duration h 168 336 minimum tensile strength MPa - 12,5 maximum variation T1/T0 % 25 - minimum
37、 elongation at break % - 300 maximum variation T1/T0 % 25 - after ageing on complete product sample b(EN 60811-1-2, Subclause 8.1.4) temperature C 100 2 100 2 duration h 168 168 minimum tensile strength MPa - 12,5 maximum variation T2/T0 % 25 - minimum elongation at break % - 300 maximum variation T
38、2/T0 % 25 - EN 50397-1:2006 8 Table 1 Properties of the covering materials (continued) 1 2 3 4 Unit Physical and chemical properties hot set test (EN 60811-2-1, Clause 9) temperature C 200 - duration min 15 mechanical stress MPa 0,2 - maximum elongation under load % 175 - maximum residual elongation
39、 % 15 - pressure test at high temperature (EN 60811-3-1, Subclause 8.1) temperature C - 80 duration h 4 coefficient k - - 0,8 maximum depth of indentation % - 50 water absorption (EN 60811-1-3, Subclause 9.2) temperature C 85 85 duration h 336 336 maximum variation of mass mg/cm 1 1 shrinkage test (
40、EN 60811-1-3, Clause 10) distance L between marks mm 200 200 duration h 1 1 temperature C 130 3 100 3 maximum shrinkage % 4 4 Shore D hardness (HD 605, Subclause 2.2.1) minimum hardness ShD - 55 aMaximum operating temperature of the conductor is limited to 80 C due to mechanical reasons. bFor use to
41、gether with watertight conductors only. Adequate measures e.g. neutral capping to prevent leakage of filling material shall be taken. An UV-protection shall be provided. If carbon black is used, the content of carbon black shall be (2,5 0,5) %. The nominal thickness of the covering shall be calculat
42、ed according to the following formula: S = 0,11 U where S is the nominal thickness of the covering in mm (rounded to one decimal place); U is the rated voltage (see 3.2) in kV. The nominal thickness of the covering shall be not less than 2,3 mm. The minimum thickness of the covering at any place sha
43、ll not be less than the nominal value by more than (0,1 mm + 10 % of the nominal value). The mean value of the thickness of the covering shall not exceed the nominal value by more than (0,1 mm + 10 % of the nominal value). A semi-conductive conductor screen, if any, shall not be measured as covering
44、 thickness. 9 EN 50397-1:2006 5 Marking 5.1 Indication of origin Covered conductors shall be provided with an identification of origin consisting of a continuous marking of the manufacturers name or trademark on the surface of the covering. This marking shall be made by embossing. 5.2 Continuity of
45、marks The distance between the end of a mark and the beginning of the next identical mark shall not exceed 1 000 mm. The diagram below shows an example of the marking, where the word “ORIGIN“ stands for the mandatory information required in 5.1 and “XYZ“ stands for one of any other mandatory marks r
46、equired in 5.3. ORIGIN ORIGINXYZ XYZ5.3 Other markings Covered conductors shall be equipped with a continuous embossing as follows: code designation according to 4.1; year of production; standard number. Optional markings (e.g. slippage factor according to Annex D, meter marking) may be added upon a
47、greement between manufacturer and user. These optional markings may be made by printing or embossing. 5.4 Durability Printed markings shall be durable. Durability shall be checked by the test according to HD 605, Subclause 2.5.4. The markings shall be legible after this test. 5.5 Legibility All mark
48、ings shall be clearly legible. Printed markings shall be in contrasting colours. 6 Tests The compliance with the requirements according to 4.2 and Clause 5 shall be established by visual examination and the tests listed in Table 2. A type test shall be performed on every covered conductor type, irre
49、spective of the cross sectional area. The results will be valid across the whole range of cross sectional areas for that type. EN 50397-1:2006 10 NOTE The slippage test shall be performed on each cross sectional area (see D.3.1). Table 2 Tests 1 2 3 4 5 No Tests Category of tests Requirements Test methods 1 Electrical tests 1.1 Conductor resistanceT, S baHD 605, Subclause 3.1.1 1.2 High voltage test for CC without conductor screen: no breakdown Test vol
