JEWorks Refresher 14 1 SCHEDULE OF DIMENSIONS Schedule

JE/Works Refresher 14. 1 SCHEDULE OF DIMENSIONS Schedule 1 Chapter 5 B General 25 KV A. C. Electric Traction with High Rise OHE ACS-21

Schedule – 1 CHAPTER V B Electric Traction with high rise OHE • ACS 21 - New chapter VB incorporated having provisions for electrification of routes where double stack container having maximum height of 6809 mm is plying.

• Minimum height from rail level to underside of contact wire in open – 7520 mm • On curves height shall be measured from higher rail. • Minimum height above rail level for a distance of 1600 mm on either side of center of track shall be • Light over head structures such as FOB – 8430 MM. • Heavy overhead structures such as ROB and flyovers – 8050 mm. • Heavy overhead structures such as ROB and flyovers if any turnout is located under the heavy overhead structure or within 40 mts from its nearest face – 8430 mm.

• Overhead structure and equipment to permit extra allowance of 275 mm for raising of track in future to cater for modern track structure in form larger ballast cushion of 350 mm or larger sleeper depth of 230 mm and heavier rail sections of 200 mm including 10 mm rubber pad by using longer traction overhead equipment masts if necessary. • In case of restricted height of existing over head structures Minimum height above rail level for a distance of 1600 mm on either side of center of track for provision high rise OHE • Light over head structures such as FOB – 7568 mm • Heavy overhead structures such as ROB and flyovers – 7468 mm.

• In case of restricted height, Heavy overhead structures such as ROB and flyovers if any turnout is located under the heavy overhead structure or within 40 mts from its nearest face – 7568 mm. • In case of restricted height of existing over head structures bridges and tunnels the minimum height of underside of the contact wire from rail level can be reduced to – 7166 mm.

• In such cases a special study shall be made before 25 KV A. C. is introduced. • Height of rolling stock – 6809 mm • Short duration electrical clearance – 200 mm. • Additional electrical clearance for oscillation of the contact wire ( OHE Span 45. 50 mts ) - 50 mm. • Allowance for track up gradation/maintenance – 50 mm. • Rise in rolling stock height under dynamic conditions – 50 mm. • Minimum height of contact wire – 7166 mm. • Extra vertical clearance shall be provided in curves.

Clearance for power line crossings including telephone line crossings of railway tracks. SL Over head crossing voltage Minimum clearances from rail level. Existing power line crossing for non electrified territory New power line or crossing planned for alteration Minimum clearance between highest traction conductor and lowest transmission line crossing conductor 1 Up to and including 11 KV Normally by under ground 2 Above 11 KV & up to 33 KV 10860 mm 16660 mm 2440 mm 3 Above 33 KV & up to 66 KV 11160 mm 16960 mm 2440 mm 4 Above 66 KV & up to 132 KV 11760 mm 17560 mm 3050 mm 5 Above 132 KV & up to 220 KV 12660 mm 18460 mm 4580 mm 6 Above 220 KV & up to 400 KV 14460 mm 20260 mm 5490 mm 7 Above 400 KV & up to 500 KV 15360 mm 21160 mm 7940 mm 8 Above 500 KV & up to 800 KV 18060 mm 23860 mm 7940 mm

• All heights are under max sag conditions • If crossing is provided with guarding a minimum clearance of 2000 mm shall be maintained between bottom of guard and highest traction conductor. • Power line crossing shall be avoided in yards and station areas. • For any electrification work of existing line, doubling/gauge conversion along with electrification existing crossing can continue if dimensions are as per col 5 even if dimensions col 3 are not satisfied for electrical works col 3 is not applicable. • Maximum width of pantograph collector - 2030 mm ( A tolerance of 10 mm is permitted )

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