1、BRITISH STANDARD BS EN 50374:2004 Conductor cars The European Standard EN 50374:2004 has the status of a British Standard ICS 43.120 BS EN 50374:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 7 April 2004 BSI 7 April 2004 ISBN 0 580 436
2、43 8 National foreword This British Standard is the official English language version of EN 50374:2004. The UK participation in its preparation was entrusted to Technical Committee PEL/78, Tools for live working, which has the responsibility to: A list of organizations represented on this committee
3、can be obtained on request to its secretary. Cross-references The British 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
4、” facility of the BSI Electronic Catalogue or of British Standards Online. 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 obli
5、gations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary
6、of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50
7、374 NORME EUROPENNE EUROPISCHE NORM March 2004 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 2004 CENELEC - All rights of expl
8、oitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50374:2004 E ICS 43.120 English version Conductor cars Nacelles suspendues Leitungsfahrzeuge This European Standard was approved by CENELEC on 2004-02-01. CENELEC members are bound to comply with the CEN/CENELE
9、C 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 Central Secretariat or to any CEN
10、ELEC 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 status as the official versions
11、. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sw
12、eden, Switzerland and United Kingdom. EN 50374:2004 - 2 - Contents Page Foreword . 3 1 Scope 4 2 Normative references 4 3 Definitions 5 4 Requirements 5 4.1 Mechanical requirements 5 4.2 Dielectric requirements . 9 5 Tests . 9 5.1 Proof of design. 9 5.2 Tests for personnel protection . 10 5.3 Test s
13、et-up. 10 5.4 Floor plate and travelling axles 10 5.5 Protection against fall. 10 5.6 Brakes and locking devices . 10 5.7 Manual handling test 11 5.8 Mounting attachments for full body harnesses 11 5.9 Mounting attachments for traction ropes 11 5.10 Mounting attachments for pulling up / removing 11
14、5.11 Drives. 11 5.12 Operating devices 11 5.13 Dielectric requirements 11 - 3 - EN 50374:2004 Foreword This European Standard was prepared by CENELEC BTWG 93-1, Conductors cars. The text of the draft was submitted to formal vote and was approved by CENELEC as EN 50374 on 2004-02-01. The following da
15、tes 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) 2005-02-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-02-01 _ EN 50374:2004 - 4 -
16、1 Scope This European Standard applies to conductor cars which are used for driving (travelling) on conductors, shield wires or shield wires with integrated communication systems of overhead transmission lines. 2 Normative references The following referenced documents are indispensable for the appli
17、cation 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 292-2 Safety of machinery Basic concepts, general principles for design Part 2: Technical principles (ISO 12100-
18、2) EN 354 Personal protective equipment against falls from a height - Lanyards EN 1011-1 Welding recommendations for welding of metallic materials Part 1: General guidance for arc welding EN 1011-2 Welding Recommendations for welding of metallic materials Part 2: Arc welding of ferritic steels EN 10
19、11-3 Welding Recommendations for welding of metallic materials Part 3: Welding of stainless steels EN 1011-4 Welding Recommendations for welding of metallic materials Part 4: Arc welding of aluminium and aluminium alloys EN 1050 Safety of machinery - Principles of risk assessment (ISO 14121) EN 1708
20、-1 Welding Basic weld joint details in steel - Part 1: Pressurised components EN 1712 Non-destructive examination of welds - Ultrasonic examination of welded joints - Acceptance levels EN 30042 Arc-welded joints in aluminium and its weldable alloys guidance on quality levels for imperfections EN 602
21、04-1 Safety of machinery - Electrical equipment of machines Part 1: General requirements (IEC 60204-1) Conductor cars are covered by the Directive 98/37/EC of the European Parliament and the Council of 22 June 1998 on the approximation of the laws of the Member States relating to machinery. In the c
22、ase of conductor cars which are also used for lifting persons, the cars are devices covered by Annex IV of the Directive. Every manufacturer or his authorised representative established in the Community shall prove by a conformity assessment procedure, that his conductor car complies with the requir
23、ements of the Directive. Where this standard covers one or more of the essential safety requirements of the Directive, conductor cars constructed in accordance with this standard shall be presumed to comply with the relevant essential requirements. - 5 - EN 50374:2004 3 Definitions 3.1 conductor car
24、s conductor cars covered by this standard are devices designed to be used as moveable workplaces on overhead lines suspended by conductors or shield wires and which are moved manually, by pulling ropes or built-in-traction. In addition conductor cars may be designed to incorporate the raising of per
25、sons to the work position 3.2 brake the brake is used for slowing down the conductor car to a standstill 3.3 locking device the locking device is used for fixing the conductor car at a position on the conductor or shield wire 3.4 conductors (IEC 466-01-15) a wire or combination of wires not insulate
26、d from one another, suitable for carrying an electric current. The conductors are strung between two supports of overhead lines. They may be arranged as a single conductor only or as a conductor bundle 3.5 Tests 3.5.1 type test (IEC 151-16-16) conformity test made on one or more items representative
27、 of the production 3.5.2 routine test (IEC 151-16-17) a periodical test defined by the manufacturer to which each individual device is subjected after manufacture by the user to ascertain that it complies with certain criteria 3.6 permissible load the permissible load is the maximum load defined by
28、the designer with which the conductor car may be loaded. The permissible load does not include the weight of the car 4 Requirements 4.1 Mechanical requirements If conductor cars are designed to raise or lower persons a suitable safety factor shall be assigned, this is usually double. 4.1.1 Frame Fra
29、meparts which are relevant for safety shall have a calculated safety factor of at least three times the stresses which may occur during the most unfavourable using condition with permissible load. All materials have unique physical properties and will behave in different ways depending on the condit
30、ions to which they are exposed. Therefore consideration should be given to raising of the safety factor for special materials. EN 50374:2004 - 6 - In case of emergency, i. e. if conductor car wheels inadvertently become detached from conductor, the safety factor may be different than under normal us
31、ing conditions. The welding shall be carried out regarding the following European Standards e. g. EN 1011-1, EN 1011-2, EN 1011-3 and EN 1011-4. The welding shall at least meet the evaluation category BS-AL in accordance with EN 30042, Arc-welded joints in aluminium and its weldable alloys - Guidanc
32、e on quality levels for imperfections. Other materials may be used if they fulfil the above mentioned requirements. 4.1.2 Chassis The chassis must be equipped with a device which protects the car from unintended tilting or falling under all operating and emergency conditions. Conductor cars with bui
33、lt-in-traction shall be designed for a maximum speed of 6 km/h. 4.1.3 Brakes and locking device 4.1.3.1 Conductor cars shall be equipped with a brake and two locking devices independent from each other. The brake can also work as a locking device. The brake and the locking device shall be rated in a
34、ccordance with 5.6. 4.1.3.2 The locking device shall fasten the conductor car directly to the conductor under all conditions. In case of failure of the brake the locking device shall take over the function of the brake. Locking devices of conductor cars shall affect at least two axles independent fr
35、om each other. 4.1.3.3 For horizontally arranged conductors the brake shall have an effect on both conductors equally. 4.1.3.4 The locking devices shall be designed and arranged in such a way that their effect on at least one axle is always ensured, especially during the overtravelling of suspension
36、 sets and spacers. 4.1.3.5 Brakes and locking devices shall be designed such that there is no damage to the conductors under normal operating conditions. 4.1.4 Personnel protection The conductor car shall be designed to allow rescue of an incapacitate operator. The conductor car shall be designed to
37、 facilitate protection against the fall of persons. In the case of conductor cars without flank protection in which the operator is sitting, there shall be a device to secure the operator to the seat. In the case of conductor cars in which the operator is standing, the conductor cars shall be equipp
38、ed with fall protection. The fall protection shall consist of a spar at a height of (1,00 0,01) m, other design elements which ensure that persons shall not fall through and a border with a height of (0,1 0,01) m at the floor. - 7 - EN 50374:2004 In the case of conductor cars which are used on bundl
39、e conductors where the operator is positioned between the bundle, subconductors may replace the function of the upper flank protections. In the case of conductor cars which are used on bundle conductors and the operator is positioned outside the bundle, chains or other elements may replace the funct
40、ion of the upper flank protections. 4.1.5 Operator environment The conductor car shall be designed such that there are no sharp edges. 4.1.6 Car floor The floor shall be slip resistant. 4.1.7 Mounting attachments Conductor cars shall be provided with clearly marked mounting attachments for transport
41、ing (shifting to conductors or trailer, etc.), external traction (with pulling rope, etc.), equipotential bond, personal protective equipment against falls from a height. If it is not requested by the customer, the conductor car may be constructed without a mounting attachment for personal protectiv
42、e equipment. An alternative attachment for personal protective equipment may be directly to the conductors. 4.1.8 Operating devices Operating devices must be designed and arranged in such a way, that they can be reached and operated easily without confusion. They shall be protected against unintenti
43、onal operation and they shall be marked durably. 4.1.9 Drives Drives comprising of gears, chains and cone belts shall be completely covered. Conductor car wheels shall be designed such that there are no risks to the operators hands. Conductor cars shall be designed such that there is no damage to th
44、e conductors under normal operating conditions. 4.1.10 Cables and hydraulic hoses Cables and hoses shall be protected against mechanical damage. 4.1.11 Break down of built-in-traction Conductor cars with built-in-traction shall be able to be moved manually or by means of a pulling rope, if the built
45、-in-traction fails. EN 50374:2004 - 8 - 4.1.12 Identification plate Conductor cars shall have a identification plate with at least the following indications: manufacturer; type; production number; year of manufacture; dead weight; permissible load; minimum and maximum diameter of conductors and shie
46、ld wires to be travelled on; maximum inclination angle of conductors and shield wires up to which the conductor car can be utilised under dry and wet conditions. The information shall be unambiguous and easily understood. The plate shall be durable. 4.1.13 Plate for safety instructions Conductor car
47、s shall be equipped with a plate which indicates main safety instructions, especially for the use of personal protective equipment. The information shall be unambiguous and easily understood, and the plate shall be durable. 4.1.14 Instructions for use Conductor cars shall be accompanied by instructi
48、ons for use which shall contain information as specified in EN 292-2, Safety of machinery Basic concepts, general principles for design, particularly the description of the product, its function and its safety equipment as car dimensions, dead weight, frame, chassis, drive, steering, permissible loa
49、d, minimum and maximum diameter of conductors and shield wires to be travelled on, maximum inclination angle of conductors and shield wires up to which the conductor car can be used, brakes, locking devices, special design, if any, indication of safe assembling and disassembling, guidance for safe operation, - 9 - EN 50374:2004 information about permitted operations, information about safety inspections by users and exp
