Medha works in association with EMU owners, operators and local coach builders to study, design and supply advanced traction system for new trainsets and also for revival of existing fleet. Solutions are designed to suit available input power supply, vehicle design and operational requirements.
Revival of existing fleet can be done in shorter duration and at very economical costs.
Association also offers opportunities for building technological capacities and capabilities within the country of implementation.
System flexibility
- Catenary Voltages - DC 750 V…3000 V, AC 15 kV…25 kV
- Propulsion System - 0.5...2.0 MW (per Motor Car)
- Full Regeneration capability
- High Reliability and Redundancy (with Fail changeover)
- Train Configuration - 4 to 18 car consists, 25% to 50% driven axles
Traction and Auxiliary Converters
- Mounting – Underfloor or On-board
- IGBT Module – 1.7kV 1200A/1800A, 3.3kV 1200A/1500A
- Cooling – Natural Cooled, Forced Air Cooled, Liquid Cooled
- Enclosure – Mild Steel, Stainless Steel, Aluminum
Train Control & Management System
- Propulsion and braking control, HVAC control, passenger information system, door control etc., Communication interface for complete train consist using WTB, MVB, CAN, Ethernet interface
Design, manufacture and commissioning of 25kV AC (OHE) based Propulsion System for EMUs
- Pantograph - 25 kV, 50 Hz, 400 A
- Vacuum Circuit Breaker - 25 kV, 1000 A
- Traction Transformer - 1 Primary (25 kV, 1300 kW), 2 Secondary (950 V, 650 kW)
- IGBT based Propulsion Converter - 2 Line Converters, 2 Inverters, bogie control, 3.3kV,1200 A IGBT
- Auxiliary Converter - 125 kVA, 415 V (3ph), 110 V (1 ph), 110 V DC
- 3 phase AC Traction Motor - 352 kW continuous, self ventilated, axle hung, nose suspended, gear box
- Train Control & Management System
- Communication interface for complete train consist using WTB, MVB, CAN,Ethernet interface
- TFT LCD driver display screens
- Passenger Information & Communication System
- System integration test IEC 61377
- Vehicle integration test IEC 61133
- EMI/EMC homologation
- Passenger carrying capacity (at Super Dense Crush Load) : Driving Trailer Car – 466, Motor Car – 446, Trailer Car – 566, 12 car consist - 6112
- Axle Load limit - 20.3 Tons (including super dense crush load of passengers)
- Track Gauge - 1676 mm, Sharpest Curve - 152.4 m radius, Turnout - 1 in 8 ½
- Acceleration 0-40 kmph (0.54 m/s2), Normal braking deceleration (110 kmph to standstill) – 0.8 m/s2)