1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationCovered conductors for overheadlines and the related accessoriesfor rated voltages above 1 kV a.c.and not exceeding 36 kV a.c.Part 3: Guide to useBS EN 50397-3:2010National forew
2、ordThis British Standard is the UK implementation of EN 50397-3:2010.The UK participation in its preparation was entrusted by Technical CommitteeGEL/20, Electric cables, to Subcommittee GEL/20/16, Electric Cables -Medium/high voltage.A list of organizations represented on this committee can be obtai
3、ned onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 63095 8ICS 29.240.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This Br
4、itish Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2010.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50397-3:2010EUROPEAN STANDARD EN 50397-3 NORME EUROPENNE EUROPISCHE NORM February 2010 CENELEC European
5、Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENEL
6、EC members. Ref. No. EN 50397-3:2010 E ICS 29.240.20 English version Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 3: Guide to use Conducteurs gains pour lignes ariennes et accessoires associs pour des tension
7、s assignes suprieures 1 kV c.a. et ne dpassant pas 36 kV c.a. - Partie 3: Guide demploi Kunststoffumhllte Leiter und zugehrige Armaturen fr Freileitungen mit Nennspannungen ber 1 kV und nicht mehr als 36 kV Wechselspannung - Teil 3: Leitfaden fr die Verwendung This European Standard was approved by
8、CENELEC on 2010-02-01. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national sta
9、ndards 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 in any other language made by translation under the responsibility of a CENELEC member into its own language and no
10、tified to the Central Secretariat 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi
11、a, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50397-3:2010EN 50397-3:2010 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric cables.
12、It was submitted to the formal vote and was approved by CENELEC as EN 50397-3 on 2010-02-01. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent righ
13、ts. 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) 2011-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-02-01 _ BS E
14、N 50397-3:2010- 3 - EN 50397-3:2010 Contents Introduction .5 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Covered conductors .6 4.1 Recommendations for selection of covered conductors .6 4.2 Recommendation for storage and transport .7 4.3 Recommendation for installation of covered
15、 conductors . 11 4.4 Other recommendations 13 5 Accessories 14 5.1 General 14 5.2 Joints 14 5.3 Insulators 14 5.4 Fittings 14 5.5 Earthing devices . 17 5.6 Arc protection devices 17 5.7 Surge arresters 19 5.8 Bird protection 19 5.9 Corona protection . 19 Bibliography . 20 BS EN 50397-3:2010EN 50397-
16、3:2010 - 4 - Figures Figure 1 View from the top 8 Figure 2 - Keep the drum standing upright, using wedges in the heels of the flanges 8 Figure 3 - Only drums with protection lagging may be piled flange on flange. Lower layer to be secured over full drum width.9 Figure 4 - Not recommended9 Figure 5 -
17、 Drums may be lifted either by crane or fork-lift truck .9 Figure 6 - Rolling the drums 10 Figure 7 - Recommended direction . 10 Figure 8 - Not recommended direction 10 Figure 9 - Unwind this way 12 Figure 10 - Never unwind this way 12 Figure 11 - Example of a joint . 14 Figure 12 - Example of a tie
18、 15 Figure 13 - Example of a bolted tension clamp . 15 Figure 14 - Example of a helical fitting 16 Figure 15 - Example of a wedge type tension clamp 16 Figure 16 - Example of a tee off connection 17 Figure 17 - Example for an earthing device 17 Figure 18 - Arc phase to phase . 17 Figure 19 - Arc pha
19、se to cross arm . 18 Figure 20 - Example of two types of arc protection devices 18 Figure 21 - Example of arc protection device for angle constructions 19 Figure 22 - Example of arc protection device combined with surge arrester 19 BS EN 50397-3:2010- 5 - EN 50397-3:2010 Introduction EN 50397 “Cover
20、ed conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c.” is in three parts. These are: Part 1: Covered conductors; Part 2: Accessories for covered conductors - Tests and acceptance criteria; Part 3: Guide to use. This Part 3 “Guide
21、 to use” assumes that the user will benefit from a single document that gives guidance on all the equipment specified within the other two parts. 1 Scope This part of EN 50397 provides general recommendations for the selection, storage, transportation and installation of the covered conductors and t
22、he related accessories specified in Parts 1 and 2 of the standard, unless otherwise specified. Safety regulations and environmental regulations as well as rules for installation and mechanical design are not considered in this Guide to use, as they are covered by relevant national regulations and la
23、ws. Relevant national regulations are not considered in this guide, but shall always be consulted as appropriate. NOTE The term “national regulations” is used throughout this guide. It may include specific safety regulations, rules of installation and other relevant instructions which, depending upo
24、n the particular country or district, may exist in a legislative (mandatory) form, or as a non-mandatory code of practice. In addition certain specific utilities may have their own safety practices. It is assumed that the design of installations, the purchase and installation of covered conductors a
25、nd of the related accessories specified in this EN is entrusted to suitably skilled and competent people. In case of doubt as to the suitability of covered conductors and the related accessories for a particular use, further specific information shall be obtained from the manufacturer. 2 Normative r
26、eferences 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 referenced document (including any amendments) applies. EN 50397-1:2006, Covered conductors for
27、 overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 1: Covered conductors EN 50397-2, Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 2: Accessories
28、 for covered conductors - Tests and Acceptance criteria EN 50182:2001, Conductors for overhead lines - Round wire concentric lay stranded conductors BS EN 50397-3:2010EN 50397-3:2010 - 6 - 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Rated
29、 Tensile Strength (RTS) an estimate of the conductor breaking load calculated using the specified tensile properties of the components wires (see EN 50397-1:2006, 4.2.1) 3.2 Specified Minimum Failure Load (SMFL) minimum load, specified by the purchaser or declared by the supplier, at which mechanica
30、l failure will not take place NOTE From the probabilistic point of view, the specified minimum failure load corresponds to the value having the probability of e % in the distribution function of the strength of the fitting. The exclusion limit e % is usually taken within 2 % to 5 % with 10 % being t
31、he upper limit (see IEC 60826). 3.3 slippage factor (X-value) the ratio between the tensile force on the covering of the conductor when a certain slippage starts to occur and the RTS of the conductor (see EN 50397-1:2006, Annex D) NOTE A X-value of e.g. 100 % means that at a force up to RTS no relat
32、ive slippage between the covering and the conductor occurs. 4 Covered conductors 4.1 Recommendations for selection of covered conductors 4.1.1 General Covered conductors specified in EN 50397-1 are equipped with a polymeric covering as protection against accidental contact with grounded parts or oth
33、er live covered conductors. Covered conductors are not touch proof, so they shall to be treated as non-protected plain conductors with regard to protection against electric shock. The use of covered conductors is only permissible in air and mounted on suitable insulators, which are at least specifie
34、d for the rated voltage of the overhead line. 4.1.2 Power frequency range Covered conductors are intended to be used in the power frequency range of 49 Hz to 61 Hz. 4.1.3 Current rating Reference shall be made either to Annex A of EN 50397-1:2006, to EN 50182 or to the manufacturers specifications t
35、o obtain the current ratings of the selected conductor cross sections and the maximum permissible conductor temperature for the covering material as given in 4.2.3 of EN 50397-1:2006. If covered conductors in accordance with EN 50397-1 are exposed to strong solar radiation or high temperature ambien
36、t conditions, the current carrying capacity shall be reduced accordingly. BS EN 50397-3:2010- 7 - EN 50397-3:2010 4.1.4 Operating conditions In addition to the current ratings, due regard shall be given to: a) the capability of the covered conductor to withstand the worst anticipated fault condition
37、s of the system; b) the earth loop impedance; c) the operating characteristics of the connected equipment; d) the voltage drop requirements for long distance conditions. In certain cases longitudinal watertight conductor constructions can be necessary to avoid corrosive effects to the conductor and
38、to obtain a sufficient life time of the overhead line system. 4.2 Recommendation for storage and transport 4.2.1 General Suitable protection, appropriate to the choice of covered conductors and the installation conditions, shall be provided against mechanical damage. Covered conductors stored at tem
39、peratures which are below those recommended for installation shall not be subject to any mechanical stress including shocks, impact, bending and torsion. It is recommended not to store complete reels in conditions, where the maximum permissible conductor temperature as given in 4.2.3 of EN 50397-1:2
40、006 is exceeded. 4.2.2 Sealing and drumming 4.2.2.1 Clearance and lagging In general it is recommended to use lagging or other equivalent protection to avoid damage to the covered conductor. If lagging is used the thickness shall be appropriate. The distance between the outer layer of the covered co
41、nductor on the filled drum and the ground or lagging shall be sufficient to avoid damage to the covered conductor. It is recommended to use a clearance of at least 50 mm. 4.2.2.2 Barrel diameter The barrel diameter of delivery drums shall not be smaller than 30 x D, where D is the outer diameter of
42、the covered conductor. 4.2.2.3 Sealing The ends of covered conductors shall be sealed to prevent ingress of moisture during transport and storage. The possibility of damage to moisture seals during transport and storage shall be borne in mind. Where such damage may have occurred, the conductor end s
43、hall be inspected and the seal remade. 4.2.2.4 Handling When handling drums, suitable precautions shall be taken to avoid damage to the covered conductor and injury to people. Due regard shall be paid to the mass of the drum, the method and direction of rolling and the method of lifting. Drums shall
44、 be stored only on even and solid ground. BS EN 50397-3:2010EN 50397-3:2010 - 8 - 4.2.2.5 Drum condition Drums shall be regularly inspected during storage to assess their physical condition. Care shall be taken to avoid damage to the covered conductor caused by nails and staples used either in drum
45、manufacturing or when applying laggings. Laggings, where applied, shall not be removed from drums until the covered conductor is about to be installed. Care shall be taken to avoid deterioration of the drums. Drums shall be stored so that the drum flanges do not contact products on other drums. See
46、Figure 1. Figure 1 View from the top Drums shall be stored with the drum axis horizontal. See Figures 2, 3 and 4. 4.2.3 Transport 4.2.3.1 Carriers Only suitable carriers shall be used. 4.2.3.2 Drum axis position Drums shall be transported with the drum axis horizontal and any drum movement shall be
47、avoided. Figure 2 - Keep the drum standing upright, using wedges in the heels of the flanges BS EN 50397-3:2010- 9 - EN 50397-3:2010 Figure 3 - Only drums with protection lagging may be piled flange on flange. Lower layer to be secured over full drum width Figure 4 - Not recommended 4.2.3.3 Loading
48、and unloading For loading and unloading of drums, suitable lifting and hoisting equipment shall be used. See Figure 5. Drums shall not be dropped. a) Drum lifted by fork-lift truck b) Drum lifted by crane Figure 5 - Drums may be lifted either by crane or fork-lift truck 4.2.3.4 Rolling of drums Drum
49、s shall be rolled only for short distances over flat solid ground in the direction indicated on the flange. See Figure 6. BS EN 50397-3:2010EN 50397-3:2010 - 10 - Figure 6 - Rolling the drums 4.2.3.5 Rewinding Rewinding shall be made as shown in Figures 7 and 8. Figure 7 - Recommended direction Figure 8 - Not recommended direction 4.2.3.6 Fastening of conductor ends to the drum Conductor ends shall be firmly attached to the drum during transport and storage without damaging the conductor ends. It is recommended that both conductor end
