2x25 KV OHE system in DFCCIL in Western corridor.ppsx
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The Western Dedicated Freight Corridor (WDFC) project involves constructing double-track electrified railway lines from Dadri to JNPT, spanning 1480 km. Key features include specific designs for axle loads, use of Japanese rail, automated signaling, and a high-voltage electrification system. The document outlines challenges related to design, coordination with contractors, and compliance with project specifications.
2x25 KV OHE system in DFCCIL in Western corridor.ppsx
- 1. OHE SYSTEM Of WDFC Mohd. Aslam Siddiqui Dy.PM (Elect.)/Ajmer A presentation on M A Siddiqui 1
- 2. Introduction of Western Dedicated Freight Corridor WDFC project entails of construction of double track electrified Railway lines from Dadri to JNPT covering about 1480 KMs. The salient features of WDFC are:- 1. Sub structure i.e. formation and bridges are designed for 32.5 T axle load and superstructure i.e. track structure is designed for 25 T axle load. 2. 60 Kg, 1080 HH Japanese rail for main line. 3. UIC 60 Kg-90 UTS for other than main line & points and crossings. 4. Ballast cushion: 350 MM for ML and 250 mm for LL and siding. 5. Sleeper density: 1660 ML and 1540 for LL and sidings. 6. Gradient : 1 in 200 7. Signalling system : Automatic with 2 Kms spacing . 8. Electrification: 2x25 KV AT feeding system with High rise OHE. M A Siddiqui 2
- 3. OHE Cylindrical foundation -Soil density of formation taken as 1.6 T/M³ -Dia. of cylindrical foundation: 900 mm for Mast & 1200 mm for Portal -Grade of concrete: M-15 for foundation casting -Grade of concrete : M-20 for mast grouting M A Siddiqui 3
- 4. Buried Earth Wire Feeder Wire Feeder Wire (288 sqmm AAAC) Contact wire (150 sqmm Cu-Sn) Arial Earth Wire Arial Earth Wire (181 sqmm ACSR) Buried Earth Wire Galvanised steel strands 19 no/ 4 mm dia Catenary wire (125 sqmm Cu-Mg) Conductor details of Over Head Equipment M A Siddiqui 4
- 5. COUNTER WEIGHT COUNTER WEIGHT ANTI CREEP WIRE REGULATED EQUIPMENT TERMINATION OF REGULATED OHE CONTACT WIRE CATENARY WIRE Presag 08/mm Schematic arrangement of Regulated Over Head Equipment M A Siddiqui 5
- 6. IN –RUN Cantilever assembly, Push Off M A Siddiqui 6
- 7. IN Run Cantilever assembly Push Off M A Siddiqui 7
- 8. Schematic diagram of a Traction sub station M A Siddiqui 8
- 9. SCOTT CONNECTION TRANSFORMER The figure shows the Scott transformer connection. The main transformer is centre tapped at D and is connected to the line B and C of the 3-phase side. It has primary BC and secondary a1a2. The teaser transformer is connected to the line terminal A and the centre tapping D. It has primary AD and the secondary b1b2 M A Siddiqui 9
- 10. Key challenges for OHE works 1. Design of Traction, OHE & SCADA for 12 minutes headway. 2. RAMS achievement. 3. Adherence to SSOD for design of OHE for high rise consignments. 4. Design of PSI within the allocated land envelope with scope of increase in longitudinal layout. 5. Various interface issues with other contractors. 6. Adherence to meet particular conditions of contracts. 7. EMI controls for DFC and also IR tinstallations. M A Siddiqui 10
- 11. Thank You M A Siddiqui 11