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1、a Date: 11 November 2008 Origin: European Latest date for receipt of comments: 28 February 2009 Project no.: 2008/03840 Responsible committee: PEL/78 Tools for live working Interested committees: Title: Draft BS EN 50528 Insulating ladders for use on or near low voltage electrical installations Supe
2、rsession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MU
3、ST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 28 February 2009. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information o
4、n commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail wit
5、hin such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations repre
6、sented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/
7、. Direct tel: 020 8996 7721 Responsible Committee Secretary: Mr Ian Richardson (BSI) E-mail: Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30193237 DC Licensed Copy: London South Bank Unive
8、rsity, South Bank University, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on European discussions in which the UK took an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. Comment i
9、s particularly welcome on national legislative or similar deviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary support in Europe, the UK will be obliged to publish the official English Language text unchanged as a British Standard and
10、to withdraw any conflicting standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible
11、 BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Wind
12、ows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example below. Further information on submitting comments and how to obtain
13、 a blank electronic version of a comment form are available from the BSI web site at: http:/ Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Typ
14、e of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use o
15、f the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank Universit
16、y, South Bank University, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI Draft for Enquiry DRAFT EUROPEAN STANDARD prEN 50528 NORME EUROPENNE EUROPISCHE NORM October 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee
17、 fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Project: 21458 Ref. No. prEN 50528:2008 E ICS 97.145;13.260 English version Insulating ladders for u
18、se on or near low voltage electrical installations Echelles isolantes pour utilisation sur ou proximit des installations lectriques Isolierende Leiter fr arbeiten an oder in der Nhe elektrischer Anlagen This draft European Standard is submitted to CENELEC members for CENELEC enquiry. Deadline for CE
19、NELEC: 2009-03-13. It has been drawn up by CLC/TC 78. If this draft becomes a European Standard, 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. Th
20、is draft European Standard was established by CENELEC 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 offici
21、al versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal,
22、Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard. Licensed Copy: London South Bank
23、University, South Bank University, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI Draft for Enquiry prEN 50528:2008 - 2 Foreword 1 This draft European Standard was prepared by the Technical Committee CENELEC TC 78, 2 Equipment and tools for live working. It is submitted to the CENELEC enquiry. 3 _ 4 L
24、icensed Copy: London South Bank University, South Bank University, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI Draft for Enquiry - 3 prEN 50528:2008 Contents 5 Page 6 1 Scope 6 7 2 Normative references . 6 8 3 Definitions 7 9 4 Requirements. 8 10 4.1 Safety requirements 8 11 4.2 Functional requirem
25、ents 8 12 4.2.1 General . 8 13 4.2.2 Ropes (if any) . 8 14 4.2.3 Stile closures 8 15 4.2.4 Pulleys (if any) 9 16 4.2.5 Rung wear devices 9 17 4.2.6 Cradle . 9 18 4.2.7 Foot leveller device (if any) . 9 19 4.2.8 Adjustable ladder stabilizer (if any) . 9 20 4.2.9 Individual standing platform (if any)
26、. 9 21 4.3 Electrical requirements . 10 22 4.3.1 Electrically non conductive parts . 10 23 4.4 Mechanical requirements 10 24 4.4.1 Design 10 25 4.4.2 Dimensions, construction 10 26 4.5 Markings . 10 27 4.6 Instruction for use . 10 28 5 Verification and testing. 11 29 5.1 General . 11 30 5.2 Design,
27、dimensions, construction 11 31 5.3 Mechanical tests . 11 32 5.3.1 Type test . 11 33 5.3.2 Alternative means for ladders having completed the production phase 12 34 5.4 Marking . 12 35 5.4.1 Presence of marking . 12 36 5.4.2 Durability of marking . 12 37 5.5 Instruction for use . 12 38 5.6 Electrical
28、 tests 13 39 5.6.1 Type test . 13 40 5.6.2 Alternative means for ladders having completed the production phase 13 41 6 Conformity evaluation 14 42 7 Modifications 14 43 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI Draft for Enquiry
29、prEN 50528:2008 - 4 Annexe A (informative) Acceptance test 18 44 Annexe B (normative) Classification of defects and associated requirements and tests . 19 45 Annexe C (informative) In-service recommendations . 20 46 C.1 General . 20 47 C.2 Use and storage . 20 48 C.3 Inspection before use 20 49 C.4
30、Maintenance . 20 50 C.4.1 Regular maintenance 20 51 C.4.2 Periodic maintenance 21 52 Annexe D (normative) General test procedure . 22 53 Figures 54 Figure 1 - Cradle sketch plan (given as an example) 15 55 Figure 2 Test on stiles - Configuration and type of electrodes used 16 56 Figure 3 Examples of
31、 foot leveller device, adjustable feet and adjustable ladder stabilizer 17 57 58 Tables 59 Table B.1 Classification of defects and associated requirements and tests 19 60 Tableau D.1 Sequential order for performing tests . 22 61 62 63 Licensed Copy: London South Bank University, South Bank Universit
32、y, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI Draft for Enquiry - 5 prEN 50528:2008 Introduction 64 Ladders covered by this European Standard are used to work on low voltage live parts, such as to 65 perform connectors fittings, repair on pole, switching actions. They are also used to carry out 66
33、 operations prior to dead working, as in the case of voltage detection, earthing and short-circuiting, 67 etc. 68 In all these cases the ladders has two main functions, to reach the part of the installation that needs 69 to be operated on and to protect the worker from risk of electrical injury, by
34、providing the insulation 70 level and maintaining the safety distance between the worker and the live or potentially live 71 installation. 72 Taking the local risk assessment into account, additional protection (either personal or collective) 73 can be furthermore considered. 74 This standard contri
35、butes to the safety of the users provided they are trained to the operations 75 envisaged. 76 Additional requirements when using the ladders should be considered to fulfil the European 77 Directives and national regulations. 78 The ladder is used in accordance with EN 50110 series. 79 This European
36、Standard has been prepared in accordance with the requirements of EN 61477.80 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 04:21, Uncontrolled Copy, (c) BSI Draft for Enquiry prEN 50528:2008 - 6 81 1 Scope 82 The present European Standard is applicable to portable l
37、adders made of non conductive stiles, 83 including accessories (cradle, adjustable foot, adjustable ladder stabilizer, foot leveller device, etc.) 84 used to work on or near electrical systems and installations in the low voltage range (below 85 1 000 V a.c/1 500 V d.c.). 86 These ladders are used,
38、to provide temporary access, generally on overhead line structures and to 87 undertake electrical operations. They shall be used by one person only per ascending leg of ladder. 88 When ladders are used where the voltage is greater than 1 000 V a.c/1 500 V d.c., EN 61478 89 applies. 90 These ladders
39、are not intended to be put in direct contact with energized parts nevertheless they 91 provide sufficient insulation level to protect against inadvertent contact with low voltage live parts. 92 The requirements and tests described in this standard shall be considered in addition to the EN 131 93 ser
40、ies. 94 NOTE The present European Standard does not cover ladders for applications upper than 1 000 V a.c/1 500 V d.c. 95 These products are separately covered by a specific standard (EN 61478). 96 2 Normative references 97 The following referenced documents are indispensable for the application of
41、this document. For 98 dated references, only the edition cited applies. For undated references, the latest edition of the 99 referenced document (including any amendments) applies. 100 EN 131-1:2007, Ladders Part 1: Terms, types, functional sizes 101 EN 131-2:1993, Ladders Part 2: Requirements, test
42、ing, marking 102 EN 131-3:2007, Ladders Part 3 User instructions 103 EN 131-4:2007, Ladders Part 4 Single or multiple hinge-joint ladders 104 EN 60068-1:1994, Environmental testing Part 1: General and guidance (IEC 60068-1:1988 + 105 corrigendum Oct. 1988 + A1:1992) 106 EN 60743:2001, Live working T
43、erminology for tools, equipment and devices (IEC 60743:2001) 107 EN 61477:2002, Live working Minimum requirements for the utilization of tools, devices and 108 equipment (IEC 61477:2001) 109 EN 61478:2001, Live working Ladders of insulating material (IEC 61478:2001) 110 EN 61478:2001/A1:2003, Live w
44、orking Ladders of insulating material (IEC 61478:2001/A1:2003, 111 mod.) 112 EN 61318:2008, Live working Conformity assessment applicable to tools, devices and equipment 113 (IEC 61318:2007) 114 Licensed Copy: London South Bank University, South Bank University, 31/01/2009 04:21, Uncontrolled Copy,
45、(c) BSI Draft for Enquiry - 7 prEN 50528:2008 3 Definitions 115 For the purposes of this document the following definitions apply. 116 117 NOTE 1 Further information on terminology is given in EN 131-1. 118 NOTE 2 The term ladder is used in this document for “ladders for use on or near low voltage i
46、nstallations”. 119 3.1 120 non conductive material 121 material either insulating or insulated 122 3.2 123 cradle 124 device designed to rest on the pole on which it is positioned 125 3.3 126 fixing straps 127 device designed to secure the ladder to the structure (pole) 128 3.4 129 adjustable foot 1
47、30 rotating shoe inserted or secured on the base of the stiles in order to adjust a level difference and 131 firmly grip to the ground 132 3.5 133 adjustable ladder stabilizer 134 system of support legs fitted to the ladder to reinforce stability when working 135 3.6 136 foot leveller device 137 dev
48、ice inserted or secured at the base of the stiles that provides stability to the ladder and/or 138 balances automatically the ground level differences 139 3.7 140 stile closures 141 bottom and upper-ends caps to close the stiles 142 3.8 143 rung wear devices 144 devices that reduce the friction and
49、ease the operation of extending ladders by limiting the 145 rung/stile contact 146 3.9 147 sliding guides 148 sleeves that help to slide sections of extending ladders and avoid rim damage to the ladder stiles 149 3.10 150 sliding wheels 151 roller devices that help to erect extending ladders and to protect walls from dents and scratches 152 3.11 153 individual standing platform 154 stan