BS EN 50122-2:1999:2002 Edition
$102.76
Railway applications. Fixed installations – Protective provisions against the effects of stray currents caused by d.c. traction systems
| Published By | Publication Date | Number of Pages |
| BSI | 2002 | 22 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | National foreword |
| 4 | Foreword Foreword to amendment A1 Contents |
| 5 | 1 Scope 2 Normative references 3 Definitions 3.1 stray current 3.2 stray current zone |
| 6 | 3.3 corrosion 3.4 cathodic protection 3.4.1 polarized electric drainage; polarized drainage 3.4.2 forced drainage 3.4.3 impressed current installation 3.5 protection potential 3.6 return circuit 3.7 track return system 3.8 return conductor 3.9 return conductor rail 3.10 return cable |
| 7 | 3.11 return cable busbar 3.12 d.c. (traction) substation 3.13 traction return current 3.14 rail joint bond 3.15 insulated rail joint 3.16 rail-to-rail cross bond 3.17 track-to-track cross bond 3.18 earth 3.19 earth electrode 3.20 tunnel earth 3.21structure earth 3.22 rail to earth resistance 3.23 conductance per unit length |
| 8 | 3.24 equipotential bonding 3.25 equipotential bonding conductor 3.26 rail potential 3.27 (effective) touch voltage 3.28 accessible voltage 3.29 closed formation 3.30 open formation 3.31 railway authority 3.32 validation 3.33 verification 3.34 earthing 3.35 open traction system earthing |
| 9 | 4 General 4.1 D.C. traction systems may cause stray currents which could adversely affect both the railway … 4.2 The following systems which may produce stray currents shall be considered: 4.3 All systems which may be affected by stray currents shall be considered, such as: 5 Traction power supply system 5.1 The traction power supply system, the return circuit and the earthing system shall be conside… 5.2 Where required the output voltage of individual substations shall be adjusted in order to min… 5.3 If trolleybuses and tramways receive their traction current from the same substation, one of … |
| 10 | 5.4 The return cable busbars in substations and similar installations shall be operated so that t… 5.5 Return cables shall have an insulating outer sheath. Return conductors and return conductor r… 6 Track system 6.1 Rail system Table 1 Recommended conductance per unit length |
| 11 | 6.2 Other parts of the track system 7 Influenced structures 7.1 General |
| 12 | 7.2 Tunnel structures |
| 13 | 7.3 Bridges, viaducts and reinforced trackbed 7.4 Depots and workshops 7.5 Cables, pipework and power supply from outside 8 Protection methods applied to metallic structures |
| 14 | Annex A (informative) Measurement of the conductance per unit length of the running rails (informative) Measurement of the conductance per unit length of the running rails A.1 General A.2 Measurement of the rail resistance A.3 Determination of the conductance per unit length between running rails and tunnel A.4 Determination of the conductance per unit length for track sections in open air |
| 15 | Fiogure A.1 Measurement of the rail resistance for a rail of�10�m length |
| 16 | Figure A.2 Measuring arrangement for the conductance per unit length, |
| 17 | Figure A.3 Determination of the conductance per unit length |
| 18 | Annex B (informative) Examples for protection methods applied to metallic structures (informative) Examples for protection methods applied to metallic structures B.1 General B.2 Polarized electric drainage Figure B.2 Polarized electric drainage Figure B.2 Forced drainage |
| 19 | Figure B.3 Impressed current cathodic protection Annex C (informative) Estimation of the longitudinal voltage in reinforced railway�structures (informative) Estimation of the longitudinal voltage in reinforced railway�structures |
| 20 | Annex D (informative) Bibliography (informative) Bibliography |
