Electric Traction (Direct Current) PDF

CHAPTER V - ELECTRIC TRACTION (Direct Current) Note: Wherever electric traction, employing overhead conductor wires, is in use strict orders must be issued prohibiting any one from getting on the roofs of vehicles until the current in the overhead conductors has been switched off and th...

CHAPTER V - ELECTRIC TRACTION (Direct Current) Note: Wherever electric traction, employing overhead conductor wires, is in use strict orders must be issued prohibiting any one from getting on the roofs of vehicles until the current in the overhead conductors has been switched off and the conductors themselves have been earthed. 1 Minimum height from rail level to the underside of live conductor wire:- (i) Under bridges and tunnels 5030mm (ii) In the open 5335mm (iii) In running and carriage sheds 5790mm (iv) At level crossing 5485mm Note: The height prescribed in item 1(iv) applies also to tramway trolley wires crossing the railway. 2 Maximum height from rail level to the underside of live contact wire 5790mm except in running and carriage sheds Note: In the case of running and carriage sheds, the maximum height of the contact wire will be determined in each case based on the operating range of the pantograph and the permissible electrical clearances required inside the sheds. 3 Maximum variation of live conductor wire on either side of the central line of track (i) On straight track 230mm (ii) On curves (on the inside of the curve) 380mm 4 Minimum distance between live conductor wire and any structure 130mm 5 Maximum width of pantograph collector 2030mm 36  CHAPTER V (A) Electric Traction 25 kV A.C. 50 Cycles Note: Wherever electric traction is in use, special precautions shall be taken in accordance with provisions made in chapter XVII of ‘General Rules’ for all Open lines of Railways. Electrical clearances: 1 Vertical and lateral distance between 25 kV live parts and earthed parts of fixed structures or moving loads/rolling stocks shall be as large as possible. The minimum vertical and lateral electrical clearances to be maintained under worst condition of temperature, wind etc. between any live part of the overhead equipment or pantograph and parts of any fixed structures (earthed or otherwise) or moving loads/rolling stocks shall be as under : (i) Long duration 250mm (ii) Short duration 200mm Note: (a) Long Duration means when the conductor is at rest and short duration means when the conductor is not at rest. (b) A minimum vertical distance of 270 mm shall normally be provided between rolling stock and contact wire to allow for a 20 mm temporary raising of the track during maintenance. Wherever the allowance required for track maintenance exceed 20 mm, the vertical distance between rolling stock and contact wire shall correspondingly be increased. (c) Where adoption of above clearances is either not feasible or involves abnormally high cost, Permanent Bench Mark shall be provided to indicate the level of track to be maintained. 2 Minimum height from rail level to the underside of contact wire : (i) Under Bridges and in Tunnels 4.80 metre (ii) In the open 5.50 metre (iii) At level crossings 5.50 metre (iv) In Running and Carriage Sheds 5.80 metre Note: (a) In cases where it is proposed to allow Locomotives or Rolling stocks not higher than 4.42 m, the minimum height of Contact Wire, specified under item 2(i) above may be reduced to 4.69 metre. (b) In cases, where it is proposed to allow only Locomotive or Rolling Stocks not higher than 4.27m, the minimum height of contact wire, specified under Item 2(i) above may be reduced to 4.54m. A board showing this restriction and specifying “locomotives or Stocks not permitted to ply on such section” shall be exhibited at the entrance to the same. (c) For movement of Over Dimensional consignments, the height specified under Item 2(i) above shall be increased by the difference between the height of the consignment contemplated and 4.42m. In case, such an over dimensional consignment is moved at speed not exceeding 15Km/h and is also specially escorted by authorized Railway Staff, the derived height of Contact Wire may be reduced by 50 mm. 37  (d) On curves, all vertical distances specified in Item (2) above, shall be measured above the level of the inner rail, increased by half the super-elevation. (e) Suitable prescribed gradient on the height of contact wire shall be provided for connecting these wires installed at different heights. 3 Maximum variation in alignment of the live Conductor Wire on either side of the centre line of track under static condition: (i) On straight track 200 mm (ii) On curves 300 mm Note: These limits would not apply to special locations e.g. Insulated Overlaps and Out of Run Wires. 4 (i) Maximum width of pantograph collector 2030mm (ii) When DC traction is converted to 25 kV AC traction, width of Pantograph collector {subject to it being within the approved MMD} : 2030mm Note: A tolerance of plus 10 mm on maximum width specified is permissible to accommodate variation in manufacture and mounting with respect to the centre line of vehicle. 5 In the case of light structures such as foot-over bridges, it would be desirable to keep a standard height of contact wire of 5.50m. In case of heavy structures, such as flyover bridges or Road over bridges, it is desirable to keep the height of contact wire as low as possible, consistent with the requirements of movement of Standard Class ‘C’ Over-Dimensional Consignments of height 4.80m. 38 (iii) Power line crossing in yards & stations area shall be avoided. (iv) For electrification works of existing track or construction of new track/ gauge conversion with electrification, existing power line crossings can continue, if dimensions are as per Column (5) above, even if dimensions of Col (3) are not satisfied i.e. for electrification works Col (3) is not applicable. 4. Maximum width of Pantograph Collector: 2030 mm Note: A tolerance of plus 10mm on maximum width specified is permissible to accommodate variation in manufacture and mounting with respect to centre line of vehicle. 41  SCHEDULE - II Existing infringements of schedule I which may be permitted to continue on existing 1676 mm gauge Railways. The following infringements of the dimensions prescribed in schedule I may, subject to such restrictions of speed as are considered necessary, be permitted on existing railways (see diagram No. 3) it being understood that when structures are altered they will be rebuilt to comply with schedule I, except in case of structures falling under item 7. Dimensions marked (a) refer to the requirements for 3250 mm wide stock [chapter IV(A) of schedule I], and those marked (b) refer to the requirements for 3660 mm wide and 4725 mm high stock (chapter IV(B) of Schedule I) 1. (a) Minimum distance centre to centre of tracks 3660mm (b) Minimum distance centre to centre of tracks 4040mm 2. (a) Minimum clear horizontal distance from centre of track to any fixed 1675mm structure from rail level to 1065mm above rail level (b) Minimum clear horizontal distance from centre of track to any fixed 1905mm structure from rail level to 1065mm above rail level 3. (a) Minimum clear horizontal distance from centre of track to any fixed 1980mm structure from 1065mm above rail level to 3505mm above rail level (b) Minimum clear horizontal distance from centre of track to any fixed 2135mm structure from 1065mm above rail level to 3355mm above rail level 4. (a) Minimum clear horizontal distance from centre of track at 4265mm 2055mm above rail level 5. (a) Minimum clear height above rail level for a distance of 305mm on 4420mm either side of centre of track. (b) Minimum clear height above rail level for a distance of 915mm on 5030mm either side of centre of track. Note: i) Items 2(a), 3(a), 3(b) and 4(a) refer to structures outside station yards only. ii) Where speed is restricted to 16 km/h, the minimum clear horizontal distance under 4(a) may be reduced to 1980 mm. iii) Where, as on girder bridges, ashpits, etc., the structure is not likely to be out of plumb and the super- elevation (or level of rails) does not vary and where the speed is restricted to 16 km/h, the above dimensions may be reduced to: 3580 mm for 1(a), 3960 mm for 1(b), 1905 mm for 3(a), 2055 mm for 3(b), 1980 mm for 4(a), 4265mm for 5(a), 4875 mm for 5(b) (iv) To the horizontal distance given in 1 to 5 must be added the extra allowance for curves (See Appendix). Where existing structures do not permit of these allowances being given, they may be 42  reduced by limiting the superelevation to be allowed for outer over inner rail. When this is done a notice board should be erected against the structure, stating the maximum permissible superelevation. 6. The minimum permissible clearances in existing tunnels and girder bridges shall be: i) Under any circumstances and subject to any restriction of speed which it may be considered necessary to impose: In tunnels On girder bridges (See Diagram No.3) At `A' 229mm 229mm at top of sides of vehicles `B' 305mm 229mm at side of vehicles `C' 380mm 305mm between moving trains `D' 229mm 152mm above vehicles ii) For unrestricted speeds: In tunnels On Girder Bridges At `A' 380mm 229mm at top of sides of vehicles `B' 535mm 455mm at sides of vehicles `C' 610mm 535mm between moving trains `D' 305mm 229mm above vehicles. Where doors opening inwards or of the recessed or sliding type are provided the minimum clearances in tunnels and bridges may be reduced to 380 mm, at `B' and 455 mm at `C' for unrestricted speed. To the above must be added the extra allowance for curves (See Appendix). 7. Structures which have already been built in accordance with items 10 and 13 of chapter I, items 9,10 and 11 of chapter II and items 5 and 6 of chapter III of Schedule I as contained in the 1958 reprint, reproduced in note below, may infringe the dimensions now shown against these items. Such infringements may continue and alterations for the removal of such infringements need be taken up only when 25 K.V. A.C. Electric Traction is undertaken when a study shall be made of each structure to limit the extent of alterations as indicated in Appendix A to chapter V-A. Note: The above items as reproduced below are not minimum dimensions of Schedule -II. The minimum dimensions of Schedule-II are as mentioned in items 1 to 6, 8 and 9 of Schedule –II. Item 10 chapter I, Schedule I Minimum height above rail level for a distance of 915 mm on 4875mm either side of the centre of track for overhead structure Note: See Appendix for ‘extra clearance required on curves’ Item 13, Chapter I Schedule I (i) Minimum distance centre to centre of tracks 4725mm 43 Note: When respacing existing lines, the minimum distance centre to centre of tracks may be reduced from 4725 mm to not less than 4495 mm for the purpose of avoiding heavy alterations to tunnels or through or semi through girder bridges. The 4725 mm dimension is to be adopted for all new works. (ii) Minimum horizontal distance from centre of track to any structure shall be as follows: Height above rail level Horizontal distance from centre of track a) From 0 to 305 mm 1905 mm b) From 305mm to 1065mm 1905 mm increasing to 2360mm c) From 1065mm to 3355mm 2360 mm d) From 3355mm to 4420mm 2360 mm decreasing to 2135mm e) From 4420mm to 5410mm 2135 mm decreasing to 915mm Note: a) Where electric traction is not likely to be used overhead bracing of bridges may be 5030 mm above rail level for a distance of 1370mm on either side of centre of track. b) See Appendix for extra clearance required on curves. Item 9, chapter II, schedule. I Minimum height above rail level for a width of 1370mm on 6100mm either side of the centre of track, of tie rods or any continuous covering in a passenger station. Note: Item 9 does not apply to overhead piping parallel to the track. Item 10, Chapter II, Schedule I Minimum height above rail level for a width of 1370mm on 4875mm either side of the centre of track of a signal gantry or a foot over bridge in passenger station Note: (a) This also applies to overhead piping arrangements parallel to track wherever provided which shall necessarily be changed over to the ground hydrants when the section is electrified. Item 11, chapter II, Schedule I Minimum horizontal distance from centre of track to any structure (i) From rail level to 305mm above rail level 1675mm (ii) From 305mm above rail level to 3355mm above rail level 2135mm (iii) From 3355mm above rail level to 4115mm above rail level 2135mm decreasing to 1980mm (iv) From 4115mm above rail level to 6100mm above rail level 1370mm Note: See Appendix for clearance required on curves. 44  Item 5, Chapter III, Schedule I Minimum height above rail level to overhead tie bars, girders etc in workshops and running sheds (i) Where electric traction is not likely to be used 5030mm (ii) Where electric traction is likely to be used 6176mm Item 6, Chapter III, Schedule I Minimum height above rail level of doorways for a width of 1370mm on either side of centre of track, in both workshops and running sheds (i) Where electric traction is not likely to be used 4875mm (ii) Where electric traction is likely to be used 6176mm A.C Traction 25 K.V. 50 cycles 8. General: For tunnels & through girder bridges. Minimum horizontal distance from centre of track to any structure 2135mm decreasing from 4420mm to 5410 mm above rail level to 915mm Note: See Appendix for extra clearance required on curves. 9. Minimum horizontal distance from centre of track to any structure 1370mm from 4115 mm to 6100 mm above rail level Note: See Appendix for extra clearance required on curves. 45  APPENDIX Note: a) Column 5 applies to goods platforms 1065 mm above rail level which are not on a running line. For such platforms on running lines 25mm should be added to the figures given in column 5. b) Where electric traction is likely to be used, add 1mm for every 12mm of height above 5410 to the figures given in the column 7 upto the height at which the conductor wires are likely to be fixed. c) Where there is a structure between tracks, the extra clearance to be provided must be according to columns 5, 6, 7 and 8 instead of column 9. d) Appendix showing extra clearance on curves has been revised. In the revised table, the maximum permissible speed and corresponding superelevation are indicated and the required clearances based on these superelevations have been given. Note on Extra Clearance on Curves 1. It has been contended that the extra clearance prescribed for curves both in the 1913 and in the 1922 Schedule of Dimensions was too liberal in the case of platforms, and caused a gap between the platform and foot board at certain parts of a bogie carriage, which was dangerous to passengers. In the 1922 schedule, the allowance for lurching and sway of the carriage was treated as entirely additional to that already provided for such motion in the clearance given for straight platforms whereas only additional sway due to the curved track in excess of the maximum occurring on straight track need be provided for. The amount of superelevation allowed for was also excessive on the sharper curves. 2. The clearance provided between a vehicle (i.e. the foot boards) and the platform coping on the straight is 152mm. It is considered that to reduce the average distance between a curved platform and the foot boards the minimum clearance between a platform on the outside of a curve and the ends of a vehicle may safely be reduced to 127mm. The maximum movement due to lurching at the centre of a vehicle cannot be greater than seven tenth of that at the ends, so that the minimum clearance between the centre of a vehicle and a platform on the inside of a curve may be safely reduced to 102mm. Therefore, in calculating the extra allowance to be provided on curves as explained in paragraph 5, 6, 7 and 8, a reduction of these extra allowance has been made of 51mm on the inside and 25mm on the outside of curve as shown in paragraph 7. 3. Allowance to be made:- The additional clearance to be given on the inside of a curve must include the effect of curvature, the lean due to superelevation, and an allowance for any additional sway of the vehicles over that already provided for in the clearance on straight tracks. The additional clearance to be given on the outside of a curve must allow for the effect of curvature. Additional sway or lurch due to curve can be considered as fully counteracted by the inward lean of the vehicle due to superelevation. 4. Allowance for curvature: The allowance for curvature for a vehicle 21340mm long, 14785mm between bogie centre shall be calculated as under:- 46  At the centre of vehicle 14.785 x 14.785 x 1000 27330 V = = mm 8R R At the end of vehicle 21.340 x 21.340 x 1000 27330 29600 Vo = - = mm 8R R R Where R is the radius of the curve in metres. 5. Allowance for superelevation: The lean due to superelevation at any point at height `h' above rail level is given by : h L = ---- x S where S is the superelevation, g is the gauge of the track. g 6. Allowance for additional sway on curves: The provision for additional lurch and sway on the inside of a curve as given in the 1913 and 1922 schedules has been adopted, namely one-fourth of the lean due to superelevation. No provision has been made for additional sway due to a curve in the outward direction for reasons already given in paragraph 3 above. 7. Platforms:- For platforms the total additional clearance to be provided is: On the inside of a curve 5 (i) V+ L - 51 mm 4 Where L is the lean in millimetres. On the outside of a curve-- (ii) Vo - 25 mm. (see paragraph 2 above) Column 5 of the Appendix has been calculated for a high passenger platform 840mm according to formula (i). 8. Clearance from adjacent structure on the inside of a curve:-- For obtaining the figures given in columns 6 & 7, formula (i) of paragraph 7 above has been used. 9. Clearance from adjacent structures on the outside of a curve: For column 8, formula (ii) of paragraph 7 above has been used. 10. Extra clearance between adjacent tracks: The worst case will be when the end of a bogie carriage on the inner track is opposite the centre of a similar carriage on the outer track. Nothing is allowed for superelevation, it being assumed that both tracks will be inclined the same amount. Though there are cases where a different superelevation is provided on each track, the distance allowed between centres of tracks gives a sufficient margin of safety to permit of this being omitted from consideration. The formula used for column 9 is 47  2L V + Vo + 4 and as the height adopted for the value of h in calculating L, is 3355mm, the above therefore reduces to V + Vo + S 11. While locating any permanent structures by the side of the track in the case of trunk routes and main lines which have the potential for the increase of speed in future, the need for additional clearances for realignment of curves for higher speed operation should be kept in view. A table showing extra clearances necessary on curves between structures and the adjacent track, and between tracks when there are no structures is given in Annexure -1 for speed of 160 kmph. 12. The clearances worked out (Annexure I) are for a vehicle 21340 mm long with bogie centres 14785 mm apart. For vehicles having different dimensions, the clearances can be worked out in the similar manner. 48  ANNEXURE-I ADDITIONAL APPENDIX ---- EXTRA CLEARANCES EXTRA CLEARANCES ON CURVES FOR HIGH SPEED ROUTES (160 KMPH) Degree of Radius Maximum Super- Extra Clearance between structure and adjacent trackExtra curvature of permissible elevation Inside of curve Outside of clearance curve speed between Upto 840 At 4420 At 5410 curve any adjacent mm above mm above mm above height track when rail level rail level rail level there is no structure between track 1 2 3 4 5 6 7 8 9 degree m kmph mm mm mm mm mm mm 1 1750 158 95 25 280 350 - 130 1.5 1167 145 142 60 440 545 - 190 2 875 130 164 85 520 640 10 230 3 583 106 165 100 540 665 25 265 4 438 92 165 115 555 680 45 295 5 350 83 165 130 570 695 60 300 6 292 75 165 145 590 710 75 360 7 250 70 165 165 605 725 95 395 8 219 65 165 180 620 740 110 425 9 194 62 165 195 635 755 130 460 10 175 58 165 210 650 770 145 490 Note: i) For any other heights extra clearance shall be worked out as per Appendix of this Schedule of Dimension. ii) In case of new line/ Gauge conversion/ Doubling (except in platform area)- (a) Below the rail level up to the formation level of the track on straight and curves up to radius of 875m 2575mm (b) Below the rail level up to the formation level of the track on curves with radius less than 875m 2725mm iii) Maximum permissible speed has been worked out for cant deficiency value of 100mm and cant of 165mm. However, maximum cant of 185mm may be assumed for the purpose of locating all permanent structure by the side of the curves on new construction and doubling on Group A routes having potential of increasing the speed in future. 49  APPENDIX A TO CHAPTER V-A Clearances required for 25 K.V., single phase, A.C. Electric Traction 1. It is desirable to provide the maximum possible clearances in the case of lines equipped for 25kV AC 50 Cycle single phase electric traction. Minimum Clearances between live bare conductors/ pantographs and Structure – (a) Short term clearances - Vertical and lateral distance between live : 200 mm Conductors and earth (normally existing only for a brief period) (b) Long term clearance - Vertical and lateral distance between live : 250mm Conductors and earth (which may remain for a considerable period) 2. In order to ascertain whether the requisite clearance would be available under an existing structure, the permissible height of the contact wire shall be determined. For this purpose, the following particulars should be known:- (a) Particulars of the structure including profile (b) Allowance for slewing of tracks (c) Allowance for low joints in tracks. (d) Radius of curvature of track under the structure (e) Super-elevation of track under the structure (f) Maximum permissible speed under the structure (g) Maximum dimensions of over-dimensional consignments which are permissible and safety measures which would be taken for movement of over-dimensional consignments. (h) Location of the structure in relation to level crossings, water columns and turnouts in the vicinity. (i) Type of overhead equipment. 3. After determining permissible height of the contact wire based on above particulars, the clearance required between the lowest portion of the bridge or structure and the top most position of the overhead wire shall be determined in each case after study of the following: a) System of tensioning of the overhead equipment b) Atmospheric conditions. c) Maximum permissible number of electric locomotives per train (double or triple headed) d) Location of the structure in relation to points and crossings, overlap, spans, etc. e) Length of structure along tracks. f) Type of structure, girder, masonry etc. g) The span of overhead equipment under the bridge h) Presence of traction feeder 50  i) Likelihood of diesel locomotives halting under the structure. 4. (a) The minimum height of contact wire for a stock height of 4.42m to be able to run on all sections electrified with 25 kV A.C. traction system with live traction overhead equipment : (i) Height of the locomotive : 4.42m (ii) Minimum clearances to contact wire : 0.25m (iii) Allowance for track maintenance : 0.02m (iv) Minimum height of contact wire (Total) : 4.69m Note: For OHE span length of 49.5m or below, the oscillations of contact wire get reduced to 0.05m and the minimum height of contact wire in para 4(a)(iv) can be reduced to 4.69m. (b) After determining the minimum height of contact wire on the assumption that it would permit passage of standard locomotives and stock, the maximum height of over Dimensional Consignments(ODC) with the live over head equipment at speed over 15km/h (when vertical oscillation of overhead equipment is pronounced) is derived as under: Minimum height of Contact Wire : 4.69m Less- (i) Minimum electrical clearance : 0.20m (ii) Track allowance : 0.02m (iii) Allowance for vertical oscillation of contact wire under : 0.05m influence of moving pantographs Total : 0.27m Permissible maximum height of Over Dimensional Consignment : 4.42m. (c) If an Over Dimensional Consignment is moved at slow speed not exceeding 15 kmph, there will be no downward displacement (due to oscillation) of contact wire. However, to cater for the likelihood of an Over Dimensional Consignment halting under a structure, a clearance of 0.25 m under rest condition is to be provided, vide item 1 of Chapter V - A. In this case the derived height of contact wire may be reduced by 50 mm. 5. In the case of light structures such as foot-over bridges, it would be desirable to keep a standard height of contact wire of 5.50m. In case of heavy structures, such as flyover bridges or road over bridges, it is desirable to keep the height of contact wire as low as possible, consistent with the requirements of movement of Standard Class `C' Over-Dimensional Consignments of height 4.80m. 51  ANNEXURE-II Statement showing the correction slips issued to Indian Railway Schedule of Dimensions (BG ), Revised-2004 ------------------------------------------------------------------------------------------------------------------------------------------ Correction File No. Date of issue Page Nos. of Slip No. IRSOD-2004 ------------------------------------------------------------------------------------------------------------------------------------------ 1. 97/CEDO/SR/14 March, 2006 10 2. 97/CEDO/SR/14 March, 2006 10 3. CT/SD/REV/BG/MG Sept, 20 3,5,8,9,12,13,14,15,16,19, 21,22,25,31 & 34 4. Not Issued 5. CT/SD/REV/BG/MG Feb, 2009 11 6. CT/SD/REV/BG/MG Oct, 2009 22 7. 2011/CEDO/SD/IRSOD/Elect./02 March,2012 6,7,8,27,28,37,38,39 8. 2008/CEDO/SD/09 Nov, 2012 16 9. 2012/CEDO/SD/IRSOD/O Oct, 2012 4,8 and10 10. 2011/CEDO/SD/IRSOD/Elect./02 Nov, 2012 6,7,8,14,27,28, 32 and 38 11. 2012/CEDO/SD/IRSOD/O/01 Dec, 2012 12 12. 2013/CEDO/SD/IRSOD/O/01 May, 2013 10 13. 2011/CEDO/SD/IRSOD/Elect./02 Oct, 2013 6,7,8,14 and 32 14. 2012/CEDO/SD/IRSOD/O/03 Nov, 2013 19,20,21,23,25 15. 2011/CEDO/SD/IRSOD/Elect./02 June,2014 14 16. 2015/CEDO/SD/IRSOD/O/01 May.,2015 10 and 14 17. 2015/CEDO/SD/IRSOD/O/01 Aug, 2015 10 18. 2012/CEDO/SD/IRSOD/O Nov, 2016 4 19. 2012/CEDO/SD/IRSOD/O(Pt.) Nov.,2016 10 20. 2011/CEDO/SD/IRSOD/Elect./02(Pt.II) July, 2017 7 and 8 21. 2012/CEDO/SD/IRSOD/O/ACS-21 Sept, 2017 28 22. 2011/CEDO/SD/IRSOD/O/1 Dec, 2017 6, 7, 14, 12 52 23. 2011/CEDO/SD/IRSOD/O/2 Dec, 2017 12 24. 2017/CEDO/SD/IRSOD/O/2 Aug, 2018 12 25. 2018/CEDO/SD/IRSOD/ACS Nov, 2018 04 26. 2017/CEDO/SD/IRSOD/O/ACS-83rd TSC Jan, 2019 4,6,9,10, 14,20,22,25 27. 2019/CEDO/SD/IRSOD/O/ACS-27 July, 2019 4, 10, 12,21,25,28 28. 2019/CEDO/SD/IRSOD/ O/ACS-27 July, 2019 10 29. 2019/CEDO/SD/IRSOD/ O/ACS-27 May, 2020 10 30. 2020/CEDO/SD/IRSOD/ O/ACS-30 Feb, 2021 4, 6, 10,14 31. 2021/CEDO/SD/IRSOD/ O/ACS-a Oct, 2021 30, 31, 32 32. 2021/CEDO/SD/IRSOD/ O/ACS_b Oct, 2021 10 53  DIAGRAM No. 1A STANDARD DIMENSIONS FOR TUNNELS & THROUGH GIRDER BRIDGES SCHEDULE I - CHAPTER I 1676mm GAUGE NOTE:- 1. WHERE THE LINE IS ON A CURVE ,THE HORIZONTAL DISTANCE OF ANY STRUCTURE FROM THE CENTRE OF ADJACENT TRACK AND THE DISTANCE BETWEEN CENTRES OF TRACKS ARE TO BE INCREASED ACCORDING TO THE APPENDIX. 2. WHEN RE-SPACING EXISTING LINES,THE MINIMUM DISTANCE CENTRE TO CENTRE OF TRACKS MAY BE REDUCED FROM 4725 TO NOT LESS THAN 4495 FOR THE PURPOSE OF AVOIDING HEAVY ALTERATIONS TO TUNNELS OR THROUGH GIRDER BRIDGES. THE 4725 DIMENSION IS TO BE ADOPTED FOR ALL NEW WORKS. NOTE:- 1830 Min. THIS CHAIN DOTTED LINE INDICATES THE MINIMUM OUTLINE WHERE ELECTRIC TRACTION IS NOT LIKELY 915 Min. 915 Min. TO BE USED VIDE ITEM 13 NOTE (i). 1370 Min 1370 Min. 1370 Min. 1370 Min. 1830Max. FUTURE MOVING 2030 UM DIM XIM E NS 2135 Min. MA ION S 3505 Max. 2135 Min. 2135 Min. 5410 Min. WIDTH OVER OPEN DOORS INCLUDING WIDTH OVER OPEN DOORS INCLUDING ALL ALL PROJECTIONS PASSENGER VEHICLES PROJECTIONS PASSENGER VEHICLES (4495Max.) 5030 Min. (4040 Max.) GOODS VEHICLES WIDTH OVER OPEN DOOR FOR GOODS VEHICLE (4500Max.) (4265 Max.) 4420 Min. 2565 2360 Min. 4495*/4725** Min. 2360 Min. 3355 Min. 4265 2000 3250 Max. 3735 3355 Max. 4265 Max. 3735 Max. Min. 9215*/9445** Min. 3355 Min. 4725 Max. 3660 Max. 3150 1170 3050 Max. 3505 Max. 1905 Min. 1905 Min. 1250 940 3810 Min. 1082 2440 Max. 1065 Max. 76 2895 Max. 1145 1676 GAUGE 1676 GAUGE RAIL LEVEL 305 305 229 203Max. 51 64 Max. Min. 91 Min. 91 Min. 140 216 Max. NOTE:- NOTE:- ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT WHERE OTHERWISE SHOWN. * - For existing works ** - For new works or alteration to existing works  DIAGRAM No. 1A (MODIFIED) 1676 mm GAUGE STANDARD DIMENSIONS FOR TUNNELS & THROUGH GIRDER BRIDGES TO SUIT 25 k.V. A.C. TRACTION SCHEDULE I CHAPTER I NOTE:- THE DISTANCES SPECIFIED APPLY ONLY IN CASE OF STRAIGHT TRACKS.ON CURVES, THE HORIZONTAL DISTANCE SHOULD BE INCREASED BY AN AMOUNT 'D' TO ALLOW FOR THE LEAN DUE TO SUPER-ELEVATION CALCULATED BY THE FOLLOWING FORMULA, WHERE 'H' IS THE HEIGHT OF THE CONTACT WIRE, 'S' THE SUPER- ELEVATION AND 'G' THE GAUGE OF THE TRACK, ALL DIMENSIONS BEING IN METRES D=HxS/G NOTE:- THIS CHAIN DOTTED LINE INDICATES THE MINIMUM OUTLINE WHERE ELECTRIC TRACTION IS NOT LIKELY 1830 Min. 1830 Min. TO BE USED VIDE ITEM 13 NOTE (i) OF CHAPTER I SCHEDULE I. 1370 Min. 1370 Min. 1370 Min. 1370 Min. FUTURE MOVING DIM 2030 UM 1830 Max. EN XIM SIO NS MA 2135 Min. 2135 Min. 5870 Min. 3505 Max. 5030 Min. WIDTH OVER OPEN DOORS INCLUDING 3660 Max. ALL PROJECTIONS PASSENGER VEHICLES WIDTHOVER OPEN DOORS INCLUDING ALL 4420 Min. (4040 Max.) PROJECTIONS PASSENGER VEHICLES GOODS VEHICLES (4495 Max.) 4265 Max. (4265 Max.) GOODS VEHICLES 3355 Max. 2565 3250 Max. (4725 Max.) 3735 Max. 2000 4265 Max. 3355 Min. 9215*/9445** Min. 4725 Max. 2360 Min. 4495*/4725** Min. 2360 Min. 3355 Max. 3150 3810 Min. 1170 3050 Max. 1250 3505 Max. 1065 940 1145 Min. 1905 Min. 1905 Min. 2895 Max. Max. 1082 2440 Max. 76 1676 GAUGE 1676 GAUGE LEVEL RAIL 305 Min. 305 229 Min. 64 Max. 91 305 91 Min. Min. 51 Min. 203 Max. 140 216 Max. NOTE:- * - For existing works NOTE:- ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT WHERE OTHERWISE SHOWN. ** - For new works or alteration to existing works  STANDARD DIMENSIONS OUT OF STATIONS DIAGRAM No. 1B SCHEDULE I - CHAPTER I 1676 mm GAUGE NOTE:- WHERE THE LINE IS ON A CURVE, THE HORIZONTAL DISTANCE OF ANY STRUCTURE FROM THE CENTRE OF ADJACENT TRACK AND THE DISTANCE BETWEEN CENTRES OF TRACKS ARE TO BE INCREASED ACCORDING TO THE APPENDIX. NOTE:- MINIMUM HEIGHT WHERE D.C. ELECTRIC TRACTION IS IN USE OR LIKELY TO BE INTRODUCED (ITEM 10(ii)) OF IRSOD, 2004 FOR LAMPS,DESTINATION BOARDS,GUTTERING & ALARM SIGNAL DISC. 1830 Min. 2030 915 Min. 915 Min. 610 NS OF 2030 SI O S TA EN N DA DIM RD X V ING CL AS MO ING DIM SE ING DIM 5410 Min. UM MOV ENS ION NG INE MOV ENS ION XIM UM S S UM S MA AXIM AXIM M M WIDTH OVER OPEN DOORS INCLUDING 4875 Min. 76 ALL PROJECTIONS PASSENGER VEHICLES FOR NUMBER PLATES, (4040 Max.) WINDOW BARS AND 4470 Max. RESERVATION CARD 460 4420 HOLDERS. GOODS VEHICLES 4265 MAX Min. 4420 Min. 4 WHEELED VEHICLES 3250 MAX 2135*/2360** Min. 4265*/5300** Min. 2135*/2360** Min. 2565 4265 Max. 2565 2000 1145 4265 Max. 8535*/10020** Min. 3735 Max. 4875 Min. 3250 Max. 3250 Max. 25 3150 1750 3150 1675*/1905** Min. 1675*/1905** Min. 1170 1675*/1905** Min. 1675*/1905** Min. 3050 Max. 3050 Max. 1082 940 940 1170 2440 Max. 2440 Max. 1082 1676 GAUGE 76 1676 GAUGE RAIL 305 Max. LEVEL 64 140 Max. 305 Min. 203 91 Min. Max. 229 Min. 91 Min. 51 305 Max. 216 Max. NOTE:- * - For existing works NOTE:- ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT WHERE OTHERWISE SHOWN. ** - For new works or alteration to existing works  DIAGRAM No. 1D MAXIMUM MOVING DIMENSIONS (EDO/T-2202) 2030 1676mm GAUGE 4265 Max. 3735 Max. 3250 Max. 2565 3150 1170 3050 Max. 1082 2440 Max. 940 1676 GAUGE RAIL LEVEL 91 Min. 305 Min. NOTE:- ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT WHERE OTHERWISE SHOWN.  DIAGRAM NO. 2 STANDARD DIMENSIONS IN STATIONS 1676 mm GAUGE TO SUIT 25 kV.A.C. TRACTION SCHEDULE I-CHAPTER II NOTE:- THE DISTANCES SPECIFIED, APPLY ONLY IN CASE OF STRAIGHT TRACK. ON CURVES, THE HORIZONTAL DISTANCE SHOULD BE INCREASED BY AN AMOUNT 'D' TO ALLOW FOR THE LEAN DUE TO SUPER-ELEVATION CALCULATED BY THE FOLLOWING FORMULA, WHERE 'H' IS THE HEIGHT OF THE CONTACT WIRE, 'S' THE SUPERELEVATION AND 'G' THE GAUG OF THE TRACK, ALL DIMENSIONS BEING IN METRES D= H x S G MINIMUM HEIGHT FOR CONTINUOUS COVERING IN PASSENGER STATIONS. NOTE:- MIN. HEIGHT WHERE D.C. TRACTIONIS IN USE OR LIKELY TO BE USED( ITEM 10 NOTE a) 140 Min. 216 Max. 1600 Min. 1600 Min. 229 Min. 51 2030 DETAILS AT A 610 STRUCTURE 155 ED FIX IM UM MAX. MOVING DIMENSIONS OF EXISTING STANDARD X CLASS ENGINES MIN CENTRE LINE OF ADJACENT TRACK 3810 Min. NEAREST PART OF ANY BUILDING ON PASSENGER PLATFORM PLATFORM OR BUILDINGS ON GOODS PLATFORM 5330 Min. OR RAMP OF STAIRCASE ON ANY PASSENGER PLATFORM 5180 Min. 4720 Min. PILLARS, LAMPS & CON A PASSENGER 4570 Min. 3355 4115*/ 3735 Min. 4110 Min. 4610** Min. Max. 4265 3960 Min. 2565 Max. 3980 Min. 3250 Max. 4470 Max. 3705 Min. 3735 Max. 4115*/ 1905 Max. 2135*/2360** Min. 3430 Min. 305 4610** 230 Min. 305 5410 MAX HEIGHT FOR GOODS PLATFORM Min. 3150 6250 MAX & MIN HEIGHT FOR A HIGH PASSENGER PLATFORM Min. 1065 3050 Max. MAX HEIGHT FOR A LOW PASSENGER PLATFORM 1170 940 Max. 2440 Max. 64 Max. 455 Max. 1082 1676 GAUGE 1676 GAUGE 305 RAIL LEVEL 840 Max. 203 Max. 140 Min. 216 Max. 305 Min. 760 Min. 305 Min. 51 229 Min. 91 Min. 91 Min. A 4265 Min. NOTE:- NOTE:- ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT WHERE OTHERWISE SHOWN. * - For existing works ** - For new works or alteration to existing works  DIGRAM NO. 3 (FIG I) 1676mm GAUGE INFRINGEMENTS OF SCHEDULE - I FOR 3660 mm GOODS STOCK & NEW STANDARAD LOCOMOTIVES IN EXISTING BRIDGES ONLY NOTES:- FULL LINES SHOW MAXIMUM MOVING DIMENSIONS OF PIERMTTED UNDER SCHEDULE-II FUTURE 3660 WIDE STOCK & OF EXISTING 3200/3250 WIDE MINIMUM CLEARANCES ON EXISTING GIRDER BRIDGES STOCK & OUTLINE OF EXISTING 3660 WIDE ELECTRIFIED STOCK DOTTED LINES SHOW OUTLINE OF NEW STANDARD X.E. & W.H. ENGINES & OF PROPOSED 3660 WIDE HIGH 915 Min. SIDED OPEN TRUCK. FULL HATCHED LINES SHOW DIMENSIONS WHICH SHOULD NOT BE INFRINGED IN TUNNELS, DOTTED HATCHED LINES D SHOW DIMENSIONS WHICH SHOULD NOT BE INFRINGED FUTURE MOVING DIM UM EN ON GIRDER BRIDGES WHERE THE TRACK IS FIXED TO AXIM SIO NS THE GIRDERS. M A 152 Min. THE MINIMUM PERMISSIBLE CLEARANCES WILL BE. (I) UNDER ANY CIRCUMSTANCES & SUBJECT TO ANY RESTRICTION OF SPEED 1980 Min. WHICH IT MAY BE CONSIDERED NECESSARY TO IMPOSE. B IN TUNNELS ON GIRDER BRIDGES 79 AT A---------229mm AT A----229mm (AT TOP OF SIDES OF VEHICLES) AT B---------305mm AT B----229mm (AT SIDES OF VEHICLES) C AT C---------380mm AT C----305mm (BETWEEN MOVING TRAINS) AT D---------229mm AT D----152mm (ABOVE VEHICLES) 305 Min. 4875 Min. (2) FOR UNRESTRICTED SPEED: 229 IN TUNNELS ON GIRDER BRIDGES 3355 Min. 4265 Min. AT A---------380mm AT A----229mm (AT TOP OF SIDES OF VEHICLES) Max. AT B---------535mm AT B----455mm (AT SIDES OF VEHICLES) 4265 2055 Min. 3355 Min. AT C---------610mm AT C----535mm (BETWEEN MOVING TRAINS) Max. AT D---------305mm AT D----229mm (ABOVE VEHICLES) 4725 WHERE DOORS OPENNING INWARDS OR OF THE RECESSED Max. OR SLIDING TYPE ARE PROVIDED, THE MINIMUM CLEARANCE IN TUNNELS & BRIDGES MAY BE REDUCED TO 380 AT B & 455 AT C FOR UNRESTRICTED SPEED. 1065 1905 Min. Max. TO THE ABOVE MUST BE ADDED THE EXTRA ALLOWANCES FOR CURVES (SEE APPENDIX.) 91 Min. NOTE:- ALL DIMENSIONS ARE IN MILLIMETRES EXCEPT WHERE OTHERWISE SHOWN.  DIGRAM NO. 3 (FIG II) INFRINGEMENTS OF SCHEDULE - I 1676mm GAUGE FOR 3660 mm GOODS STOCK & NEW STANDARAD LOCOMOTIVES IN EXISTING TUNNELS ONLY PERMTTED UNDER SCHEDULE-II TUNNEL SECTION OF 1913 NOTE:- PLEASE REFER TO NOTES GIVEN IN MINIMUM CLEARANCES IN EXISTING TUNNELS DIAGRAM No. 3 (FIG I) SECTION B SECTION A SHOWING SHOWING RAIL LEVEL LOWERED 380 IN MINIMUM CLEARANCES FOR 3660 WIDE TUNNEL SECTION OF 1913 TO OPEN TRUCKS EXISTING ELECTRIC FACILITATE PROVISION OF MINMUM STOCK & NEW STANDARD LOCOMOTIVES CLEARANCES FOR 3660 WIDE STOCK. D 915 Min. 610 305 LOC 915 Min. OM OTIV Min.. TY PE 2-8- 2 L OC OM E WIT H 28.4 TO W.H OT FUTURE MOVING DIM ION FOR YPE 2-8-2 IVE WIT NNE AXLE M 2030 ENS.E. T H2 LOA MU EN DIM X 2.9 D FOR TO AXI 1755 Max.WIDE ELECTRIFIED SIO A NN ION WIDE ELECTRIFIED STOCK E ENS AXL M NS DIM EXIST ING 3660 EL