1、 IEC 62128-1 Edition 2.0 2013-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications Fixed installations Electrical safety, earthing and the return circuit Part 1: Protective provisions against electric shock Applications ferroviaires Installations fixes Scurit lectrique, mise la terre
2、et circuit de retour Partie 1: Mesures de protection contre les chocs lectriques IEC62128-1:2013 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or b
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16、des questions contactez-nous: csciec.ch. IEC 62128-1 Edition 2.0 2013-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications Fixed installations Electrical safety, earthing and the return circuit Part 1: Protective provisions against electric shock Applications ferroviaires Installation
17、s fixes Scurit lectrique, mise la terre et circuit de retour Partie 1: Mesures de protection contre les chocs lectriques INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XD ICS 45.060 PRICE CODE CODE PRIX ISBN 978-2-8322-1040-6 Registered trademark of the Internat
18、ional Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 62128-1 IEC:2013 CO
19、NTENTS FOREWORD . 7 1 Scope . 9 2 Normative references . 9 3 Terms and definitions . 10 3.1 Electrical safety and hazards . 10 3.2 Earthing and equipotential bonding . 13 3.3 Return circuit . 14 3.4 Electric traction system . 15 3.5 Contact line . 17 3.6 Corrosion and corrosion protection 19 3.7 Cur
20、rent collection 19 3.8 Residual current devices . 20 3.9 General terms . 20 4 Contact line zone and current collector zone 21 4.1 Overhead contact line systems 21 4.2 Conductor rail systems 23 4.3 Trolleybus systems 23 5 Protective provisions against direct contact 24 5.1 General . 24 5.2 Protection
21、 by clearance . 25 5.2.1 Standing surface . 25 5.2.2 Exceptions for working persons . 27 5.2.3 Warning signs 27 5.2.4 Minimum height of overhead contact lines above roads . 27 5.2.5 Feeders above loading roads . 27 5.2.6 Clearance between live parts of overhead contact line systems and trees 28 5.3
22、Protection by protective obstacles . 28 5.3.1 General . 28 5.3.2 Obstacles for standing surfaces in public areas . 29 5.3.3 Obstacles for standing surfaces in restricted areas 31 5.3.4 Protection degree for obstacles for low voltage 37 5.3.5 Anti-climbing provisions . 37 5.4 Protective provisions al
23、lowing working under live conditions 37 5.4.1 General . 37 5.4.2 Overhead contact lines for railways or tramways beneath structures . 38 5.4.3 Overhead contact lines for trolley bus systems beneath structures 38 5.5 Specific protective provisions against electric shock in conductor rail systems . 40
24、 5.5.1 Location of conductor rail at platforms . 40 5.5.2 Exceptions . 40 5.5.3 Protection provisions in workshops 40 5.5.4 Protective boarding for conductor rails in restricted areas 40 5.5.5 Requirements for top contact conductor rails in public areas . 41 5.5.6 Requirements for top contact conduc
25、tor rails in restricted areas 41 5.6 Specific protective provisions against electric shock in systems in which the wheels of the vehicles are not used for return circuit . 43 62128-1 IEC:2013 3 5.6.1 General . 43 5.6.2 Railway systems 44 5.6.3 Trolleybus systems 44 6 Protective provisions against in
26、direct contact . 45 6.1 General . 45 6.2 Protective provisions for exposed conductive parts within the contact line zone or the current collector zone . 45 6.2.1 AC traction systems . 45 6.2.2 DC traction systems 45 6.2.3 Exceptions for low voltage traction systems . 46 6.2.4 Anchors of non-conducti
27、ve masts 47 6.3 Protective provisions for wholly or partly conductive structures 47 6.3.1 Structures in the overhead contact line zone or the current collector zone 47 6.3.2 Parts in the vicinity of the railways . 48 7 Protective provisions for low voltage non-traction power supplies . 48 7.1 Genera
28、l . 48 7.2 Related provisions . 49 7.3 Protective provisions for electrical installations in the overhead contact line zone or the current collector zone . 49 7.3.1 Exposed conductive parts 49 7.3.2 Equipment of protection Class II 50 7.4 Protective provisions for installations which are endangered
29、by the traction power supply return circuit. 50 7.4.1 Design of auxiliary power supply 50 7.4.2 Low voltage power supply by TT system 51 7.4.3 Low voltage power supply by TN system . 51 7.4.4 Special provisions . 52 8 Protective provisions where track systems, which are utilized for carrying tractio
30、n return current, or/and contact line systems pass through hazardous zones . 57 8.1 General . 57 8.2 Equipotential bonding 58 8.3 Parallel pipework . 58 8.4 Insulating joints . 59 8.5 Surge arrester . 59 8.6 Contact line of loading sidings . 59 9 Limits for touch voltage and protective provisions ag
31、ainst the danger of rail potential . 60 9.1 General . 60 9.1.1 Rail potential . 60 9.1.2 Body voltage and touch voltage . 60 9.1.3 Touch voltage at vehicles 60 9.1.4 Fault duration condition . 61 9.1.5 Voltage limits and time duration aspects 61 9.2 Touch voltage limits in a.c. traction systems 61 9
32、.2.1 General . 61 9.2.2 AC voltage limits for the safety of persons . 61 9.3 Touch voltage limits in d.c. traction systems 64 9.3.1 General . 64 9.3.2 DC voltage limits for the safety of persons . 65 4 62128-1 IEC:2013 9.4 Access control . 67 10 Additional protective provisions 67 10.1 Traction subs
33、tations and traction switching stations 67 10.2 Cables . 67 10.2.1 General requirements 67 10.2.2 Cables in a.c. traction power supply systems . 67 10.2.3 Cables in d.c. traction power supply systems . 67 10.3 Return circuit connections and earthing conductors . 68 10.3.1 General requirements 68 10.
34、3.2 Continuity of the return circuit 68 10.3.3 Cross-bonding of the return circuit . 68 10.3.4 Railway systems in which the traction current is confined within insulated conductors 69 10.4 Removing of decommissioned overhead contact lines . 69 10.5 Means of achieving safe isolation between sections
35、69 10.5.1 Section insulators 69 10.5.2 Isolating gaps 69 10.6 Lightning protection . 69 Annex A (informative) Typical obstacles. 70 Annex B (normative) Warning sign . 72 Annex C (informative) Guiding values for rail potential gradient . 73 Annex D (informative) Effective touch voltage and body volta
36、ge with respect to the body current . 75 Annex E (normative) Measurement methods for effective touch voltages . 81 Annex F (normative) The use of voltage-limiting devices 82 Annex G (normative) Special national conditions . 84 Annex H (normative) A-deviations 86 Annex I (informative) Principles for
37、the return circuit of a.c. railways 87 Bibliography 89 Figure 1 Overhead contact line zone and current collector zone. 23 Figure 2 Overhead contact line zone and current collector zone for trolley bus systems 24 Figure 3 Minimum clearances to accessible live parts on the outside of vehicles as well
38、as to live parts of overhead contact line systems from standing surfaces accessible to persons for low voltages 26 Figure 4 Minimum clearances to accessible live parts on the outside of vehicles as well as to live parts of overhead contact line systems from standing surfaces accessible to persons fo
39、r high voltages . 26 Figure 5 Standing surfaces for persons providing access to live parts on the outside of vehicles and to overhead contact line systems 28 Figure 6 Standing surfaces for persons providing access to live parts on the outside of vehicles and to conductor rail systems 29 Figure 7 Exa
40、mples of obstacles for standing surfaces in public areas for protection against direct contact with adjacent live parts on the outside of vehicles or adjacent live parts of a contact line system . 30 Figure 8 Examples of obstacles for standing surfaces in restricted areas for protection against dire
41、ct contact with adjacent live parts on the outside of vehicles or adjacent live parts of a contact line system for low voltages 33 62128-1 IEC:2013 5 Figure 9 Examples of obstacles for standing surfaces in restricted areas for protection against direct contact with adjacent live parts on the outside
42、 of vehicles or adjacent live parts of a contact line system for high voltages 34 Figure 10 Examples of obstacles for standing surfaces in restricted areas for protection against direct contact when above live parts on the outside of vehicles or live parts of a contact line system for low voltage 36
43、 Figure 11 Examples of obstacles for standing surfaces in restricted areas for protection against direct contact when above live parts on the outside of vehicles or live parts of an overhead contact line system for high voltage . 37 Figure 12 Example of an insulated obstacle beneath a structure 38 F
44、igure 13 Example of an insulated obstacle beneath a structure for an unearthed trolley bus system . 39 Figure 14 Example of an insulated obstacle beneath a structure for a trolley bus system in which the negative contact wire is earthed or connected to the return circuit of a tramway system . 40 Fig
45、ure 15 Public and private level crossings 41 Figure 16 Trackside structures . 42 Figure 17 Signal-post with telephone . 42 Figure 18 Authorized trackside walking route . 43 Figure 19 Railway controlled crossing (depots, goods yard, station crossing) . 43 Figure 20 TT system for a.c. railways . 53 Fi
46、gure 21 TN system for a.c. railways 54 Figure 22 TT system for d.c. railways . 56 Figure 23 TN system for d.c. railways 57 Figure 24 Disposition of rail-to-rail cross-bonds and track-to-track cross-bonds (double-rail illustration) and connection of the contact line in case of the loading siding havi
47、ng a contact line . 58 Figure 25 Location of a surge arrester outside the overhead contact line zone of a loading siding if there is a possibility of flashovers of the insulating pieces through lightning strikes . 59 Figure 26 Design of return circuit, with regard to permissible effective touch volt
48、age by checking the rail potential or the effective touch voltage . 64 Figure A.1 Examples of obstacles along the sides of standing surfaces in public areas for protection against direct contact when they are above live parts on the outside of vehicles or live parts of an overhead contact line syste
49、m for low voltages (see 5.3.2.2) . 70 Figure A.2 Examples of obstacles along the sides of standing surfaces in public areas for protection against direct contact when they are above live parts on the outside of vehicles or live parts of an overhead contact line system for high voltages (see 5.3.2.2) . 71 Figure B.1 Warning sign . 72 Figure C.1 Guidance values for the rail potential gradient measured at
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