Medha Brochure by Medha Servo Drives Pvt. Ltd.

VISION To be World Leader in Railway Products MISSION Enjoying Innovation and Applying Technology for Improving the lives of People Enhancing the image of India in the world, in high Technology

VALUES ¿ Innovation ¿ Customer Delight ¿ Simple Living High Thinking ¿ Inclusive Growth ¿ Respect for People

Propulsion Systems Rolling Stock Equipment Signaling

An IRIS, ISO 9001:2015 and CMMI Level 3 certiďŹ ed, R&D focused company, with more than 30 years experience in design, development and manufacturing of high technology products and systems for Railway applications

Medha's ongoing endeavor... to evolve new technology products and systems, meeting present and future requirements of Railways

Propulsion Systems Diesel Locomotives Diesel Multiple Unit (DMU) Electric Locomotives Electric Multiple Unit (EMU) Metros Dual-mode Locomotives

06 08 10 12 16 18

Excitation and Propulsion System for

Diesel Locomotives (for New or Modernized Diesel-Electric Locomotives) Medha offers range of traction and propulsion system solutions for diesel-electric locomotives. The requirement can be for manufacture of new locomotives, renewed life for old locomotives or for technological upgrades. Implementation of complete traction chain may include engine(s), alternator, rectifier, traction converter(s), traction motors, advanced controls, driver console(s), dynamic brake grids, electricals and other sub-assemblies. Solutions are available for different track gauges and locomotive ratings.

 >60% increase in reliability; Increased availability

 <5 years ROI (repowering, rebuilding or modernization of locomotives)  <2 years ROI (partial modernization)

 Increased lease rentals per locomotive; Lower life cycle costs; Reduced maintenance (up to 50%)

 >15 years increase in locomotive useful life

 Increased horse power rating of locomotives

 >20% increase in haulage capacity (improved adhesion)

 Reduced lube oil consumption (up to 70%)

 >20% reduction in fuel consumption and harmful emissions

 Advanced safety features; Fault diagnostics and remote monitoring over internet

Customer Choice New or Rebuild Locomotives

Repowering and Reconfiguration

(rating 1200 HP to 5500 HP) AC or DC traction locomotives, complete traction chain or rebuilding of existing system

(rating 700 HP to 3000 HP) Out-of-frame building of condemned, scrapped or non-operational locomotives

Conversion

Upgrade

(rating 2000 HP to 4500 HP) DC traction to IGBT based AC traction system with microprocessor controls and AC traction motors

(rating 2000 HP to 4500 HP) Thyristor and GTO based system to IGBT based traction

Panel with Control System and Electrical Switch Gear

IGBT based Traction Converter including Traction Computers

Propulsion Systems

3ɸ AC Traction Motor

Head End Power

Driver Desk with TFT LCD Displays

Engine (MFI, EFI or CRDI)

Driver Console (with TFT LCD displays)

Alternator (AC)

Head End Power (HEP)

10 Fuel Level Sensors (Ultrasonic type)

Traction Converter (IGBT Based)

Dynamic Brake Resistor (DBR Grids)

3 Locomotive Remote Monitoring (LRMS) 11

Control Panel (Microprocessor Control with electricals)

3 Traction Motors (AC)

Upgrade from GTO to IGBT with locomotive power enhancement

4000 HP locomotive upgraded to 4500 HP (wide gauge), GT46MAC, EMD 710 engine, 3 MW IGBT traction converter, individual motor control, 500 kVA HEP, distributed power control, Remote monitoring

Rebuilding of 3220 HP locomotive (wide gauge), Ruston 12RK215T engine, 2 MW IGBT traction converter, individual motor control, 22 kVA HEP, Dynamic braking, Remote monitoring

Electronic Governor / CRDI (Retrot)

Out-of-frame rebuilding of scrapped locomotives

2000 HP (meter gauge), dual air-conditioned cabs, 1800 rpm MTU CRDi engine, UIC compliant brake system, microprocessor controls, TFT LCD driver console, CAN interface with engine control unit, remote monitoring system

3000 HP (cape gauge), GE engine and alternator, DC traction, microprocessor controls, dynamic brake grids, TFT LCD driver console, remote monitoring

Locomotive modernization with microprocessor control implementation, additional features including event recording, vigilance control, remote monitoring, fuel level sensing etc.

3000 HP (standard gauge), GT26CW, EMD engine and turbo charger

2200 HP (standard gauge), GT26, EMD engine, without turbo charger

1250 HP (meter gauge), YDM4, 1050 rpm engine with 8 inline cylinders

3000 HP locomotive with gauge change (cape gauge), WDG series, 1050 rpm, 16 cylinder engine

2400 HP Locomotive (meter gauge) with Pielstick engine

Propulsion Systems

Propulsion System for

Diesel Multiple Unit (DMUs) Medha, as a DMU propulsion system supplier, offers design, manufacture, supply and commissioning of single or multiple diesel engine based, complete propulsion system along with train control and communications for Diesel Multiple Unit (DMU) vehicles with power rating from 700 HP to 2200 HP. Client requirements includes - design and manufacturing of new DMU trainsets, repowering and/ or rebuilding and modernization of existing trainsets or upgrade of old DMUs. Repowering, rebuilding and/or moderization of existing trainsets and other sub-systems is to suit customer requirements. Repowering or Rebuilding of DMUs  Increased acceleration and shorter braking distances

 Increased power rating  Increased seating capacity (200-350 seating capacity/unit)  Longer trains (up to 20 cars per trainset)  Improved controls and fault diagnostics  Flexibility in selection of engine and vehicle equipment

 Reduced breakdown and maintenance requirements  Implementation of fuel efficient solutions such as common rail, electronic fuel injection  High level of transmission efficiencies

Features



Communication and Interfaces Wire Train Bus (WTB) Multifunction Vehicle Bus (MVB) Control Area Network (CAN) interfaces for train communication network

Auto Test Modes Various auto and manual test modes, including load box, auto test for relays, manual test of inputs and outputs, self load test, meters test, excitation test, radiator fan tests and more ….

Electrical Control Cabinet

Propulsion Systems

Alternator with Rectifier



Safety Features Protections for low water level, low lube oil pressure, engine overspeed, locomotive overspeed, traction motor overspeed, engine overload, power and control ground, traction motor overheating and many more …… Extensive Fault Diagnostics and Data analysis Over 250 types of faults with more than 220 types of parameters with fault data pack recording (1 second resolution) and easy download to laptop and USB pendrive

Traction Converter

Traction Motor

10 2

9 3

1 Driver Console (with TFT LCD displays)

Diesel Engine (CRDI, EFI, MFI)

Passenger Information System

2 Vehicle Control Panel

IGBT based Traction Converter

Vehicle Remote Monitoring

3 Traction Alternator

Auxiliary Converter

3 11

Dynamic Brake Grids

4 Rectier

Traction Motors (AC)







New and Rebuild DMUs

Upgrades

Conversion

Propulsion system designed as an integral part of vehicle design to achieve desired ratings, performance and features

Retrofit solutions to upgrade PLC based car controllers to microprocessor based car controllers with improved vehicle availability and diagnostics

DC traction, high maintenance DMUs converted to IGBT based, low maintenance and high performance AC traction with advanced controls and enhanced power rating

1600 HP DMU

Basic unit: 1 DPC + 4 TC Train consist: 2/3/4 basic units or 10/15/20 cars respectively Max. speed: 120 km/h Initial acceleration: 0.47 m/s² System Integration Test (IEC 61377) Vehicle Integration Test (IEC 61133)

Passenger capacity (10 car consist): 900 seating, 1800 standing, 14 lavatories Engine: 1600 HP, 1800 rpm, Cummins/ Caterpillar Auxiliary alternator and compressor: directly coupled Alternator: 1.1 MW, 1800 rpm synchronous alternator with inbuilt exciter Traction converter: 2 units, 550 kW per unit, underframe mounted, IGBT based and forced air cooled, 32 bit DSP based traction computers, bogie control AC traction motors: 250 kW, 3000 rpm, self ventilated, axle hung, nose suspended

Controls: microprocessor based vehicle control computer, WTB train communication network Driver desk: complete with 10.4" TFT LCD display screen and various controls Battery bank: 24 Vdc (engine starting) and 110 Vdc (train auxiliary loads) Passenger information system (audio/visual) Efficiency at full load: traction alternator 95%, diode rectifier 99.5%, traction converter 98.5%, AC traction motor 93%, gear box 98% Overall power chain transmission efficiency approx. 85% Propulsion Systems

Propulsion and Vehicle Control System for

Electric Locomotives Medha offers propulsion systems for New or Modernized Electric locomotives. Scope of supply may include complete integrated solutions (point of supply to point of drive) i.e. Pantograph, Vacuum Circuit Breaker, Main Transformer, IGBT Traction Converter(s), Auxiliary Converter, Vehicle Control and Fault Diagnostics system and AC Traction Motors or sub-set of above as per project requirement.

 Highly redundant yet well integrated Vehicle Control Units

 Fault data can be downloaded through pendrive or laptop or PC

 Independent motor control improves wheel slip control (improved adhesion)

 All parameters and faults from all sub-systems are provided on single display unit

 Load changeover when any one auxiliary converter fails, redundant control of battery charger

 Upgrade options provided for CCB, DPC, and HL

ɸ System flexibility

Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ

Features

Input Voltages (OHE) : 25 kV, 15 kV, 1500 Vdc, 3000 Vdc, Multi-voltage power supply Traction converter : IGBT switching devices Traction control : independent motor control or full bogie control Energy efficiency : electrical regenerative brakes Obsolescence management : availability of spare parts for full life span of locomotive Track Gauge : all gauge sizes

§ § § § § § §

4.5 MW IGBT Converter, Stainless Steel body

Propulsion Systems

Head End Power (HEP) 500 kVA converter

Full regeneration capability Independent motor control with individual motor cut-out Redundant CAN communications over Optic Fiber with Vehicle Control Unit Extensive fault diagnostics, protection to traction equipment and event recording GPS/GSM/CDMA based Remote Monitoring of Locomotives Increased reliability, reduced maintenance, modular design Improved wheel slip control and wheel-rail adhesion

Vehicle Control Unit

IGBT Module (water cooled)

10 9

Pantograph

Vehicle Control Cubicle(s)

Vacuum Circuit Breakers

Auxiliary Converter Cubicle(s)

10 Vehicle Remote Monitoring

3 3

Traction Transformer

3 7

Head End Powerter (HEP)

Line and Traction Converter(s)

Traction Motors (AC)

Driver Console (with TFT LCD displays)







New and Rebuild Locomotives

Upgrades

Conversion

Integrated, complete propulsion system (AC traction)

Microprocessor based control and fault diagnostics implementation on DC traction locomotives Existing GTO system to IGBT based traction system

Silicon diode or thyristor rectifier based DC traction locomotive to AC transformer, IGBT traction converter and AC traction motor based locomotive

Electric Locomotive (6000 HP)

Overhead Voltage: 25 kV, 50 Hz (16 kV to 31 kV) System upgrade includes – GTO converter to IGBT based Traction Converter, Microprocessor based Vehicle Control, IGBT based Auxiliary and Hotel Load Converter

Propulsion System Modernization (Freight/Passenger) Retained Equipment – Pantograph, Vacuum Circuit Breaker, Transformer, Traction Motors etc. Traction Transformer - 1 Primary winding, 4 Secondary Traction windings (4 x 1449 kVA), 1 Auxiliary winding (334 kVA), 1 Head End Power winding (945 kVA) (Passenger only) Traction Converters - 2 units, Water cooled Each converter includes – 2 line converters (1ɸ full bridge IGBT rectifier), DC link (100 Hz resonant filter, DC link capacitor bank, over-voltage protection), 3 motor inverters (3ɸ full bridge IGBT inverter), 4.5 kV 1200 A IGBT module

Auxiliary Converter - 3 x 132 kVA, (415 V 3ɸ supply and 110 Vdc battery charger), forced air cooled, 32-bit DSP based auxiliary computer, thyristors for input rectifier & IGBTs for inverter Hotel Load Converter - 2 units, 500 kVA 750V 3ɸ, forced air cooled, IGBT rectifier & IGBT inverter (3.3 kV, 1500 A/ 1200 A) Vehicle Control Unit - redundant computers, CAN (over optic fiber) based locomotive communication network, WTB based inter-locomotive communication, provision for radio based distributed power system Driver Interface - 10.4" TFT LCD display

Propulsion Systems

Complete Traction System (Underslung) for

Electric Multiple Unit (EMUs) 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 (< 40% cost of new EMUs). Association also offers opportunities for building technological capacities and capabilities within the country of implementation.

 Proven-in-use modules, packaged to meet space and weight restriction in underframe  Inbuilt redundancy and reliability for improved availability

 Stainless Steel (SS) enclosures with IP65 protection  Centralized system configuration, software programming and data downloading

 Bogie level control

 Forced air cooled propulsion system in underframe cabinets

 Energy efficient solutions

 Optimal weight distribution between all EMU cars

 Touch based HMI with centralized data and information

Features



Communication and Interfaces Train-wide control network with redundant Ethernet Consist Network (ECN) and Ethernet Train Backbone (ETB) between control systems of TCMS as per IEC 61375.



Test Modes Centralized auto and manual test modes, including brake test, auto test for relays, brake chopper test, pantograph and VCB operation test, air conditioner test, door control test, manual test of inputs and outputs for entire train control equipment.

EMU Traction Converter



Auxiliary Control Cabinet

Propulsion Systems

Safety Features All power equipment, such as traction converters/ auxiliary converter, are continuously diagnosed for its protection from input over voltage, input over current, load side earth fault and short circuit protection. High power discharge is ensured before opening of cabinet doors for personnel safety. Extensive Fault Diagnostics Over 500 types of faults covering more than 700 parameters. Fault and event storage for 100 days. Centralized configuration and downloading of faults, events and status data.

Electrical Control Cabinet

Central Control Unit

Passenger Comfort Unit

1&2

(2)

PCU1

(2)

(4)

1&2

PCU2

(2)

(4)

(2)

(4)







New and Rebuild Trainsets

Upgrades

Conversion

Integrated, complete propulsion system (AC traction)

Microprocessor based control and fault diagnostics implementation on DC traction trainsets Existing GTO system to IGBT based traction system

Silicon diode or thyristor rectifier based DC traction to AC transformer, IGBT traction converter and AC traction motor based trainsets

Train 18

Propulsion Systems

Complete Traction System for

 Proven-in-use modules, packaged to meet space and weight restrictions

 System operation for customized input from transformer winding (25 kV ac) or 1500 Vdc

 In-built redundancy and reliability for improved availability

 Touch based HMI with centralized data information

 Bogie level control

 Mild Steel (MS), Stainless Steel (SS) or Aluminum (Al) enclosures with IP54 or better protections

 Under-frame or on-board mounted, light weight solutions

 Centralized system configuration, software programming and data downloading

 Energy efficient solutions

 Forced air cooled

Features



Communication and Interfaces Train-wide control network with redundant Multi-function Vehicle Bus (MVB) and Wired Train Bus (WTB) or redundant Ethernet Consist Network (ECN) and Ethernet Train Backbone (ETB) between control systems of TCMS as per IEC 61375.



All power equipment are continuously diagnosed for its protection such as traction converters / auxiliary converter I/P over voltage, input over current, load side earth fault and short circuit protection.



Test Modes Centralized auto and manual test modes, including brake test, auto test for relays, brake chopper test, lights and fans test, manual test of inputs and outputs for entire train control equipment.

EMU Traction Converter

Auxiliary Control Cabinet

Propulsion Systems

Safety Features

Electrical Control Cabinet

Extensive Fault Diagnostics Over 500 types of faults covering more than 700 parameters. Fault and event storage for 100 days. Centralized configuration and downloading of faults, events and status data.

Central Control Unit

Passenger Comfort Unit

Ethernet Switch

Ethernet Switch PIS

PIS

Cab Rear Wall

Display 1

Display 2

Driver Desk CCU1

Display 3

ECC Cabinet

CCU2

HMI Speed Recorder

Display 2 Display 3

Display 4

WTB PIS

Driver's Desk

Display 1 PCU1

Driver's Desk

Display 2

Display 4

BCU

MVB CAN Traction Cabinet

Display 3

MCH

MCU

End Wall Panel

End Wall Panel PCU3

Shunting Desk

Auxiliary Cabinet

End Wall Panel

ACU

Freq. Generator

LTC

PCU2 MCH

TRAIN LINES

EP Unit

DTC

EP Unit







New and Rebuild Trainsets

Upgrades

Conversion

Integrated, complete propulsion system (AC traction)

Microprocessor based control and fault diagnostics implementation on DC traction trainsets Existing GTO system to IGBT based traction system

Silicon diode or thyristor rectifier based DC traction to AC transformer, IGBT traction converter and AC traction motor based trainsets

Sub-urban EMU (Mumbai) Passenger capacity (12 car consist): 1168 seating, 4862 standing

AC traction motors: 268 kW, 3000 rpm, axle hung, nose suspended

Line Converter: 1 unit per basic unit, 1800 V, 760 A per unit, onboard mounted, IGBT based control and forced air cooled, 32 bit DSP based line computers

Controls: microprocessor based TCMS with dual redundant MTB/ WTB communication network Driver desk: driver control interface with 10.4” touch based TFT, switches/ push buttons and master controller

Traction converter: 1 unit per basic unit, 1430 V, 468 A per unit, onboard Battery bank: 110 Vdc , 90 AH per basic mounted, IGBT based control and unit forced air cooled, 32 bit DSP based Passenger information system: LED traction computers, bogie level control based in-coach display with audio Auxiliary Converters: 79.2 kVA, 415 V 3ɸ announcements 50 Hz, 18.6 kVA 3ɸ 110 Vac 50 Hz, 10.9 kW 110 Vdc

Propulsion Systems

Complete Traction System for

Metro Train Medha works in association with Metro owners, operators and local coach builders to study, design and supply advanced traction system for building new metro trains and/ or for revival or renewal of existing fleet of old metro cars. 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.

 Proven-in-use modules, packaged to meet space and weight restrictions

 In-built redundancy and reliability for improved availability

 Mild Steel (MS), Stainless Steel (SS) or Aluminum (Al) enclosures with IP54 or better protections.

 System operation for customized input from transformer winding, third rail supply (600 to 750 Vdc)

 Bogie level control  Under-frame or on-board mounted, light weight solutions.  Energy efficient solutions

 Touch based HMI with centralized data information  Centralized system configuration, software programming and data downloading

 Forced air cooled

Features



Test Modes Centralized auto and manual test modes, including brake test, auto test for relays, brake chopper test, lights test, manual test of inputs and outputs for entire train control equipment.

Traction Converter

Propulsion Systems



Auxiliary Power Converter

Safety Features All power equipment are continuously diagnosed for its protection such as traction converters/ auxiliary converter input over voltage, input over current, load side earth fault and short circuit protection. Extensive Fault Diagnostics Over 500 types of faults covering more than 700 parameters. Fault and event storage for 100 days. Centralized configuration and downloading of faults, events and status data.

Electrical Control Cubicles

Driver Cab Rear Wall Panel

(8)







New and Rebuild Metros

Upgrades

Conversion

Integrated, complete propulsion system (AC traction)

Microprocessor based control and fault diagnostics implementation on DC traction trainsets

Silicon diode or thyristor rectifier based DC traction to IGBT based AC traction system and AC traction motors

Existing GTO system to IGBT based traction system

Kolkata Metro

Basic unit: 1 DTC +1 MC Train consist: 2/3/4 basic units or 4/6/8 cars respectively Max. speed: 90 km/h Average acceleration (0-40 km/h): 0.85 m/s² Average deceleration: 1.1 m/s²

Passenger capacity (8 car consist): 400 seating, 3120 standing Traction converter: 2 units per basic unit, 435 kW per unit, underframe mounted, IGBT based control and forced air cooled, 32 bit DSP based traction computers, bogie level control Auxiliary Converters: 162 kVA, 415 V 3ɸ 50 Hz, 110 Vdc AC traction motors: 204 kW, 3000 rpm, fully suspended Controls: microprocessor based TCMS with dual redundant ECN/ ETB communication network

Driver desk: driver control interface with 10.4” touch based TFT, switches/ push buttons and master controller Battery bank: 96 Vdc , 300 Ah per basic unit Passenger information system: 17.5” TFT based in-coach display with audio announcements

Propulsion Systems

Dual Mode Locomotive with both diesel and electric traction on the same vehicle

Dual-mode locomotive can be operated as diesel electric as well as electric locomotive. While operating in non electrified routes, dual-mode locomotive works as diesel electric locomotive by drawing power from onboard diesel engine as the primary power source. The same works as an electric locomotive by drawing power from catenary in electrified sections. The solution will help in operating a single locomotive continuously in electrified as well as non-electrified sections. 11

5 10 8

Engine (MFI, EFI or CRDI)

Alternator (AC)

Driver Console (with TFT LCD displays)

10 Fuel Level Sensors (Ultrasonic type)

E-Locker unit comprising, Control Panel (Microprocessor Control with electricals) Traction Converter (IGBT based) Auxiliary Converters (IGBT based) Traction Transformer

Oil Cooler Unit (Transformer cooling)

3 Locomotive Remote Monitoring (LRMS) 11

Dynamic Brake Resistor (DBR Grids)

12 Pantograph

3 Traction Motors (AC)

Vacuum Circuit Breakers

Electronic Governor / CRDI (Retrot)

Compressor

3 4

In addition to the advantages with Medha traction equipment for diesel electric and electric locomotives, the following are benefits with dual-mode locomotives,  Reduced detention time of locomotive and rakes in the traction change points  Eliminates stabling additional locomotives and manpower at changeover points  Improves throughput of the sections  Operational flexibility in case of catenary disruption due to any natural calamities  Higher reliability due to redundancy of traction power supply system in electrified territories

Dual Model Locomotive (4500 HP) Power Output: 4500 HP Rail Power in Electric mode 4500 HP Engine Power in Diesel mode Traction Transformer: 1 Primary winding, 4 secondary traction windings (4 x 1118 kVA) and 1 filter winding (400 kVA) Diesel Engine: EMD:16-7103GB Traction Converters - 4 line converters each of 1000 kVA, DC link nominal voltage 200 V, 6 motor inverters (3ɸ full bridge IGBT inverter) each 650 kW

Propulsion Systems

E-Locker cabinet Auxiliary Converters: 110 kVA, 415 V 3ɸ 50 Hz, 72 Vdc AC traction motors: 650 kW, 3600 rpm Vehicle Control Unit: microprocessor based vehicle control unit with redundant CAN based locomotive communication network

Rolling Stock Equipment Vehicle Control System

Electronic Governor

Traction Converter

Common Rail Direct Injection

Traction Alternator

Driver Guidance System

Traction Motors

Auxiliary Power Unit

Remote Monitoring

Passenger Information System

Auxiliary Converters

HVAC Controller

Hotel Load Converters

Fuel Level Sensor

Distributed Power Control

Vigilance Control Device

End of Train Telemetry

Speed and Event Recorders

TFT LCD Displays

Dynamic Brake Resistors

Driver Consoles

Microprocessor based Vehicle Control and Fault Diagnostics System (for New or Retrofit of Locomotives and Traction Vehicles) Medha's MEP system is a 32 bit, high performance microprocessor based modular system that provides complete traction and propulsion control of the vehicle with continuous monitoring and extensive fault diagnostics. Major functions includes Engine control, Excitation control, Propulsion control, Wheel slip control, Auxiliary controls, Traction equipment protection, Fault Diagnostics, Data recording and Parameters display.

 Very cost competitive

 >20% increase in haulage capacity

 Increased protection of traction equipment

 Upto 45% increase in wheel-rail adhesion

 >10% increase of traction motor life  User configurable parameters for easy adaptation to different types of vehicles

 Extended comprehensive warranty, maintenance contract and other customer friendly after sales support packages

 >15% reduction in vehicle assembly and commissioning time

 Easily configurable to suit any make or model of locomotive (new or retrofit locomotives)

Features



Communication and Interfaces



Using CAN, ethernet or other channels for interface with Engine ECU unit, HEP, Surveillance system, ATP and other subsystems of the vehicle



Engine Speed Sensor

TM Speed Sensor

Rolling Stock Equipment



Extensive Fault Diagnostics and Data analysis Over 250 types of faults with over 220 types of parameters with fault data pack recording (1 second resolution) and easy download to laptop and USB pendrive

Voltage Sensor

Current Sensor

Pressure Sensor

> 20% Increase in locomotive haulage capacity >15% Reduction in vehicle assembly time < 2yr Pay-back Period for retrofits

On-board control panel, housing vehicle control computer and all electrical components

Display unit for control system

Microprocessor based Vehicle Control System 32 bit, high performance microprocessor

 Large Number of Installations

Easy Installation and Commissioning

Since 2002, over 4200 systems have been installed on different make and types of locomotives and vehicles in various countries

Available as ready to install control panel with all electrical components, reduces vehicle assembly and commissioning time by >15%

Standardized Solutions to suit Vehicles of different make, model, type and HP rating, with nominal software and hardware variations Ÿ Any combination of traction

equipment make, model or type (AC or DC traction)

Ÿ For new locomotives and for

retrofit during repowering, rebuilding or major overhaul

Compliance to International Standards IEC 60571 IEC 61373 (shock and vibrations) IEC 60068 (Environment) IEC 61000 (EMC) IEC 62236-3-2 (surge, EMC, ESD, EFT)

Temperature Sensor

Analog Distribution Box Speedometer is an inbuilt part of Medha's MEP system

Add-on Features Vehicle remote monitoring Fuel saving solutions Distributed power control Fuel level sensors Auto creep control and many more...

Air flow sensor

Fuel level sensor

Rolling Stock Equipment

IGBT based Traction (Propulsion) Converters Medha supplies IGBT based traction (propulsion) converters ranging from 1.1 MW upto 4.5 MW and higher power ratings for installation on AC-AC traction vehicles including Locomotives, DMUs, EMUs and Metros. Medha's traction converters are designed to suit project requirement including building of new traction vehicles and retrofit or modernization or replacement of old (GTO or Thyristor) converters with IGBT traction converters.

 Energy efficient solutions

 Proven-in-use modules, packaged to meet space and weight restrictions

 In-built redundancy and reliability for improved availability

 Mild Steel (MS), Stainless Steel (SS) or Aluminum (Al) enclosures with IP54 or better protections

 Forced air or liquid cooled

 Individual motor or bogie control

 Customized for input from Alternator, Transformer winding, or Third Rail supply (600 to 750 Vdc)

 Under-frame or on-board mounted, light weight solutions

Customized traction chain solutions for new vehicles

Upgrade Thyristor / GTO based traction to IGBT systems (retrofit solutions for locomotives, DMU and EMU)

Ÿ Ÿ

Ÿ Ÿ Ÿ

Propulsion system designed as an integrated system and integral to vehicle design Cost effective solutions to keep overall vehicle cost competitive Designed to suit vehicle performance requirements, weight limits and cooling requirements Low life cycle cost EMI/EMC Homologation Latest technology and best in class features

IGBT Module (water cooled)

§ § § § § § § §

IGBT Module (air cooled, heat pipe technology)

Rolling Stock Equipment

Gives new life (20 years or more) to old vehicles Resolves spare parts availability problems Overcomes technological obsolescence issues Economize by retaining healthy equipment Extended warranties and other after sales support schemes Customized solutions to suit existing vehicle design, space and weight criteria Improved reliability, availability and performance of old vehicles Proven-in-use modules & sub-system

IGBT Module (air cooled)

Traction Control Computer

5.1 MW Traction Converter (water cooled) for 6000 HP AC Electric Locomotive

3 MW Traction Converter (forced air cooled) for 4500 HP Diesel Locomotive

2.88 MW (underslung) Traction Converter for Electric Multiple Unit (EMU)

Proven Solutions

Input

Output

Starting TE IGBT

Cooling

830 kW Traction Converter (forced air cooled) for Metro Train

2200 HP Diesel Loco

4500 HP Diesel Loco

5500 HP Diesel Loco

Freight/ Passenger

1600 HP DMU

6000 HP Electric Loco

1 MW Traction Converter (forced air cooled) for 1600 HP Diesel Multiple Unit (DMU)

1.3 MW EMU

2.88 MW EMU

Retrofit/Upgrade Retrofit/Upgrade Retrofit/Upgrade Diesel Multiple Unit Freight/ Passenger Electric Multiple Unit Electric Multiple Unit

Conﬁguration

Power

1.3 MW Traction converter for Electric Multiple Unit (EMU)

Metro Train

1 Cabinet

2 Cabinets

1 Cabinet

4 Cabinets

2 Cabinets

6 Independent Traction Inverters

1 Traction Inverter each

2 Line Converters 3 Traction Inverters each

2 Line Converters 2 Traction Inverters each

1 Line Converters 1 Traction Inverters each

1 Traction Inverter each

1650 kW

3100 kW

3900 kW

1100 kW

5100 kW

1152 kW

2160 kW

1100 kW

275 kW X 6 Inverters

520 kW X 6 Inverters

650 kW X 6 Inverters

550 kW X 2 Inverters

1275 kW X 4 LCs 850 kW X 6 Inverters

576 kW X 2 Inverters

540 kW X 4 Inverters

550 kW X 2 Inverters

600 - 1800 Vdc Link

600 - 2600 Vdc Link

600 - 2700 Vdc Link

600 - 1800 Vdc Link

838 - 1547 Vac (1F)

630 - 1142 Vac (1F)

500 - 900 Vdc

From Traction Alternator

From Traction Transformer

From 3rd Rail Supply

Engine Driven

4 Secondaries

2 Secondaries

4 Secondaries Up to 1375 Vac (3F), 540 kW

Up to 615 Vac (3F), 415 kW

200 kN

140 kN 1.7 kV, 1800 A

Up to 1375 Vac (3F), 275 kW

Up to 2030 Vac (3F), 520 kW

Up to 2090 Vac (3F), 650 kW

Up to 1375 Vac (3F), 550 kW

Up to 2185 Vac (3F), 850 kW

Up to 1375 Vac (3F), 576 kW

387 kN

540 kNFreight 462 kN Passenger

560 kNFreight 462 kN Passenger

160 kN

520 kN Freight 320 kN Passenger

135 kN

3.3 kV, 1200 A

6.5 kV, 600 A

4.5 kV, 900 A

3.3 kV, 1200 A

4.5 kV, 1200 A

3.3 kV, 1200 A

3.3 kV, 1000 A

Water Cooled

Forced Air Cooling

Independent Motor Control

Bogie Control

one inverter for two traction motors

Stainless Steel On-board

Aluminium On-board

Stainless Steel Underslung

Water Cooled

Independent

Forced Air Cooling

for each inverter

Forced Air Cooling

for 2 motors

Independent

Forced Air Cooling

for each inverter

for 2 motors

100 kN per motor coach

Independent

Forced Air Cooling

for each inverter

heat pipe

heat sink

Type of Control Enclosure, Mounting

Independent Motor Control

Bogie Control

Mild Steel On-board

Mild Steel Underslung

one inverter for two traction motors

Rolling Stock Equipment

Traction Alternators (Joint Venture with Traktionssysteme Austria GmbH, Austria)

Medha offers traction alternators for different makes and models of diesel locomotives and diesel multiple units. For new vehicles, the alternator is designed as an integral part of vehicle propulsion system whereas for rebuilding or re-powering projects, offered alternators are unit replacement to old alternator.

Class 220 insulation is achieved by adhering to stringent material requirements and very effective impregnation system. Traction alternators are designed to withstand harsh railway conditions when installed on locomotives and DMUs and to suit any type of traction system.

1800 rpm alternator with in-built excitation generator for 1600 HP DMU

Offered range of alternators includes

Rating of upto 5000 kVA, customers can choose

Other criteria of selection may include

ì Medium speed (~1000 rpm)

ì Alternator directly coupled to

ì slip-ring type or double bearing

machines coupled to engine makes such as EMD, GE, ALCo etc.

ì High speed (~1800 rpm) machines coupled to engine makes such as Caterpillar, Cummins, MTU, MAN etc.

CMM Machine

Rolling Stock Equipment

engine crank shaft and meeting electrical requirements for both propulsion and auxiliaries

ì Alternately with inbuilt companion alternator for auxiliary requirements

VPI Plant

type;

ì top-mounted rectifier; ì inbuilt hotel load winding or companion alternator;

ì inbuilt excitation generator;

Induction Brazing Machine

Dynamic Balancing Machine

Traction Motors (Joint Venture with Traktionssysteme Austria GmbH, Austria)

Medha, in association with Traktionssysteme, Austria (which has >40 years of experience in design and manufacture AC traction motors in Austria) offers range of traction motors for diesel and electric locomotives, DMUs, EMUs, Metros and other types of traction vehicles. Range of motors includes 268 kW motor for 1600 HP DMU, 268 kW motor for 1.3 MW EMU, and 420 kW motor for 4500 HP diesel locomotive, all meeting IEC 60349 standard. Recently designed and supplied fully suspended 204 kW motors for metro trains, and 253 kW motors for 2.8 MW EMU.

AC traction motor for 1.3 MW EMU and 1600 HP DEMU

Fully suspended AC traction motor with Gearbox for EMUs

Design flexibility w

w w

Fully suspended AC traction motor with Gearbox for Metro trains

Customer's benefits

Motors are designed to suit different types of cooling (self ventilated, forced air cooled, liquid cooled), bogie design (axle hung nose suspended, semisuspended, fully-suspended) and track gauge (meter, cape, standard, wide gauge) Special designs for flood proofing requirements Complete gear drive is supplied as an integrated solution

w w

w w w w

Vacuum Oven (Pre-heating)

Three phase AC asynchronous traction motor for 4500 HP diesel locomotive

Coil Looping Machine

Price competitiveness with manufacturing facility in India Large database of designs from projects all over the world; can be easily customized for any new requirement Class 220 insulation allows compact motors Long operating life and low life cycle cost Any motor rating from 40 kW to 1600 kW Option to have single manufacturer taking responsibility for all propulsion equipment including converter, alternator, motor and controls

Coil Spreading Machine

Industrial Washing Machine

Rolling Stock Equipment

Remote Monitoring of Traction Vehicles in Real-time (VRMS – Vehicle Remote Monitoring System |GPS/GSM/CDMA based) Medha's VRMS system is a one-stop-solution to meet all the below requirements Exact location and status (idling, working with load, etc.) of the vehicle Health status of all electrical/mechanical equipment Immediate information of any critical fault or failure Fuel availability and consumption related information Communication with the vehicle driver incase of urgency Reduced maintenance time and cost Increased availability of vehicle for increased revenue ü Performance data for trends and analysis ü ü ü ü ü ü ü

GPS Satellite GSM / CDMA

Server

Antenna for GSM/CDMA/GPS (IP65 Protection)

Remote Monitoring Unit (using GSM/CDMA for communication and GPS for location tracking)

Rolling Stock Equipment

Access from any where in the world through internet

Advantages w

> 30% reduction in maintenance time (prior information of failures and faults)

> 10% reduction in maintenance cost based on preparedness for repair

Online monitoring of vehicle and parameters

Fuel consumption and vehicle usage monitoring

Extensive data analysis tools in application software

Automatic alerts of critical faults over SMS and email

Extendable to provide direct voice communication with vehicle driver

User-settable features to receive filtered and relevant information in customized formats

Notchwise Traction Power Statistics

Time trend visualization of Pneumatic parameters

Operational features ì

Using GPS (for location) and GSM/CDMA (for communication), remote monitoring unit will send vehicle status details as available with vehicle control unit (or TCMS) to main internet server

User can access their fleet status details over internet by simply logging on to the website. Using their personalized username and password, users get access to historic and current data of the vehicle

User can also access the status details of the fleet and receive alerts based on the credentials provided, through android based mobile app

Security of vehicle information is ensured through multi-level access rights and password protections

For pre-defined types of faults or conditions, the user can receive alerts over SMS and email

APU Usage Summary

Configuration of Critical Alerts

Current status of the locomotive

REMMLOT Locos worldwide map

Life Time Data of Locomotive

Exporting User defined Reports

Rolling Stock Equipment

Auxiliary Converters (2.5 to 540 kVA)

There are no standard auxiliary converters that can fit different applications. Requirement of every auxiliary converter is unique and accordingly designed. Medha has designed different types of auxiliary converters in the range of 2.5 kVA to 540 kVA and for various types of applications such as air-conditioned passenger coaches, electrical multiple units and metro cars.

 Energy efficient solutions

 Proven-in-use modules, packaged to meet space and weight restrictions

 In-built redundancy and reliability

 Mild Steel (MS), Stainless Steel (SS) or Aluminum (Al)

availability

enclosures with IP54 or better protections

for improved

 Natural, forced air or liquid cooled

 Under-frame or on-board mounted, light weight

 Customized for input from Alternator, Transformer

solutions

winding or Third Rail supply (600 to 750 Vdc)

Flexibility to suit customer needs Ÿ Ÿ

Ÿ Ÿ Ÿ

Sample architecture

Input : AC or DC or both Input source : Vehicle transformer, Alternator, Traction Converter dc link, Battery Bank, Third Rail or others Output : AC or DC or both Cooling : Natural/Forced air convection or Liquid cooling Auxiliary loads : Blower, Pump, Compressor, Lighting, Fan, HVAC, Heating, Battery charging, Radiator fan, other vehicle specific sub-systems Converter mounting : Underframe, Onboard, Roof or as Distributed modules Weight : as per customer requirement Body : Mild Steel, Aluminum, Stainless Steel

§ § § § § § §

180 kVA

Rolling Stock Equipment

50 kVA

Input power is processed through a converter to provide a stable and controlled DC bus voltage. Output may be another DC stage (with or without galvanic isolation) or an AC inverter with regulated output. IGBT switching devices used along with Thyristors, power diodes and MOSFETs. Polypropylene (dry) capacitors used for improved life and ripple handling capabilities. Magnetics (transformers and inductors) used for isolation and harmonic filtering. Sensors (voltage, current, temperature) used for control, monitoring and protection purposes. Optic fiber communication for electrical noise immunity. DSPs or Microcontrollers used for overall controls. Type tested to latest IEC standards such as IEC61287, IEC60571, and IEC61373.

25 kVA

2.5 kVA

EMU Auxiliary Converter 125 kVA

Auxiliary Converter for Air Conditioned Coaches 25 kVA

Electric Locomotive Auxiliary Converter Unit 132 kVA

Electric Locomotive Auxiliary Converter Unit 2 X 132 kVA

Metro Car Inverter 100 kVA

Some of the Implemented Solutions Electric Locomotive Electric Locomotive

Rating

Output

300 kVA

600-1200 Vac (1F)

415 Vac (3F), 132 kVA &

132 kVA X 3

from transformer auxiliary winding

110 Vdc, 12 kW for battery charger

180 kVA

500-1140 Vac (1F)

125 kVA

from transformer auxiliary winding

1800 Vdc from dc Link of Traction Converter

Electric Multiple Unit (EMU)

415 Vac (3F), 162 kVA

for TM cooling, & Compressor 110 Vdc, 18 kW for battery charger

110 Vac (1F), 21 kVA

285 - 450 Vac (1F) from traction transformer secondary

110 Vdc, 30 kW for battery charger,

Passenger Coaches

Forced air cooling

IP54 cabinet

Forced air cooling

IP54 cabinet

Forced air cooling

IP65 cabinet

Natural Air Convection cooled

IP65 cabinet

Natural Air Convection cooled

IP65 cabinet

underframe mounted

coach lights, doors, and other DC loads

160 kVA

500 - 1000 Vdc from third rail collector

415 Vac (3F), 132 kVA for air conditioning

110 Vdc, 25 kW for

50 kW

500 - 1000 Vdc from third rail collector

415 Vac (3F), 25 kVA for air conditioning

110 Vdc, 25 kW for battery charger

Passenger Coaches

IP54 cabinet Inbuilt redundancy and load change overs among three inverters

415 Vac (3F), 275 kVA + 235 kVA

for air conditioning, propulsion cooling, compressor, pantry loads

all DC loads and battery charger

Metro Cars

Forced air cooling

Other Details

110 Vdc, 14.4 kW for all DC loads 110 Vdc, 2.6 kW for battery charger 540 kVA

Metro Cars

Cooling

415 Vac (3F), 87 kVA

for propulsion cooling, compressor, coach ventilation for lighting & fans

Electric Multiple Unit (EMU) Underslung Metro Cars

Input

EMU (Underslung) Auxiliary Converter Unit 540 kVA

5 kW

25 kVA

2.5 kVA and 5 kVA

500 - 1000 Vdc

underframe mounted

6-12 Vdc, 5 kW for ﬁeld injection to TM for braking

Natural Air Convection cooled

IP65 cabinet

from third rail collector

110 Vdc

415 Vac (3φ), 25 kVA for

Natural Air Convection cooled

IP65 cabinet

230 Vac (1φ), 2.5 kVA and 5 kVA

Natural Air Convection cooled

IP65 cabinet

from battery in parallel to axle driven Alternator

110 Vdc from battery

Air conditioning

for Coach lighting and charging plugs

underframe mounted

Rolling Stock Equipment

Head End Power (HEP) (Hotel Load Converter or Auxiliary Train Supply) Medha offers HEP units from 300 kVA-500 kVA and higher (1000 kVA – 2x500 kVA), utilizing capacities of alternator / transformer to meet auxiliary power requirements such as lighting, fans, HVAC, heating, battery charging etc. of complete train.

500 kVA converter, on-board mounted, forced convection cooled

500 kVA converter, underframe mounted, forced convection cooled

 Single, dual or multi voltage options  Energy efficient design  In-built redundancy and safety features  Underframe or on-board mounted  Natural air cooled, forced air cooled or liquid cooled  Modular design for ease of maintenance  Compact, reliable and robust design to withstand railway conditions  Compliance to international standards: IEC 60571, IEC 61287, IEC 61373  Flexibility to have integrated HEP units with inbuilt battery charger, HEP unit integrated with traction converter, or other customer specified requirements

Rolling Stock Equipment

HEPs are IGBT based converters, using sine filters at inverter output to minimize harmonic distortions. Protections for output overload, short circuit and power ground are provided. The converters are designed to suit wide range of inputs.

Implemented solutions 6000HP electric locomotive, 1000 kVA (500 kVA X 2) HEP units, 525-900 Vdc input, 3.3 kV IGBT, forced air cooled, IP54 protection, on-board mounting 4500HP diesel locomotive, 500 kVA HEP unit, 12002600 Vdc input, 6.5 kV and 2.5 kV IGBTs, forced air cooled, IP65 protection, underframe mounting

Distributed Power Control (DPC) (using wireless data radio) Radio Link

Radio Link

ELECTRICAL CONTROL CABINET - ECC #2 TYPE

SL. NO.

MCP 461

1001

LOCO TYPE

ELECTRICAL CONTROL CABINET - ECC #2

WDG4 / WDP4

MFG.

TYPE

08 / 07

SL. NO.

MEDHA SERVO DRIVES PVT. LTD.,

MCP 461

1001

LOCO TYPE

ELECTRICAL CONTROL CABINET - ECC #2

WDG4 / WDP4

MFG.

TYPE

08 / 07

SL. NO.

MEDHA SERVO DRIVES PVT. LTD.,

P-4/5B, IDA, NACHARAM, HYDERABAD - 500 076.

MCP 461

1001

LOCO TYPE

WDG4 / WDP4

MFG.

08 / 07

MEDHA SERVO DRIVES PVT. LTD.,

P-4/5B, IDA, NACHARAM, HYDERABAD - 500 076.

DLW ORDER NO.: 060580540 . 06284993 DATE : 24.05.2006

P-4/5B, IDA, NACHARAM, HYDERABAD - 500 076.

DLW ORDER NO.: 060580540 . 06284993 DATE : 24.05.2006

Upto 5 locomotives can be synchronized in a train formation Four locomotives distributed in upto four locations along the train and following the power and brake commands from the lead locomotive  Operational and fault data from all locomotives made available on TFT LCD driver display for better control and maneuverability of formation

 More rapid deceleration is possible  Reduced lateral forces and friction (reduced wheel and track wear)  Reduced impact of heavy trains on tracks  Overcomes difficulties related to excessive intrain slack action, deterioration of air brake signal propagation, and stress on infrastructure and equipment

 Brake pipe continuity test to ensure integrity of train

 Fail safe modes incase of radio communication failure

 Brake pipe based operation incase of radio communication failure

End-of-Train-Telemetry (EOTT) (using wireless radio) Medha's EOTT system includes End-of-Train (EOT) device mounted on last vehicle and Cab Display Unit (CDU) mounted in driver cabin. Communication between EOT and CDU is through wireless radio signal.  Increased revenue (pay-load car instead of caboose or guard van)

 Reduced braking distance and reduced rail and wheel wear (simultaneous application of service brake from locomotive and End of Train device)

 Improved safety (train integrity function for early detection of train parting) EOT (End of Train) device

CDU (Cab Display Unit) CDU is interfaced to locomotive brake system (pressure sensors) and wireless data radio for communication with EOT

EOT is mounted on coupler of last vehicle and connected to train brake pipe. It monitors brake pipe pressure at end of train and reports the same to CDU. Upon command from CDU, EOT will also apply brakes.

Radio Link Complete interchangeability of EOT and CDU devices with only journey specific radio frequency linking between EOT and CDU

EOT Device (with rechargeable battery) mounted on last vehicle

ELECTRICAL CONTROL CABINET - ECC #2 TYPE

SL. NO.

MCP 461

1001

LOCO TYPE

WDG4 / WDP4

MFG.

08 / 07

MEDHA SERVO DRIVES PVT. LTD., P-4/5B, IDA, NACHARAM, HYDERABAD - 500 076.

DLW ORDER NO.: 060580540 . 06284993 DATE : 24.05.2006

Rolling Stock Equipment

TFT LCD Driver Displays Medha supplies TFT LCD displays, an efficient man-machine interface to provide better visualization of vehicle data. Multiple programmable screens are used to provide practically unlimited amount of information to driver. 10.4" multi-functional TFT LCD displays, available with Vandal proof keys or Touch Screen option, are mounted in driver console (driver desk) of Locomotives, EMUs, DMUs, Metro cars or other propulsion vehicles.

 Reduced driver desk clutter with removal of individual dials and gauges  Customized display screens as per customer requirements

Installation Features

 Multi-lingual display for different languages  Brightness adjustment (automatic or manually adjustable)  Low power consumption

Superior Technical Features

Parameters can be displayed as icons, dials, graphs, text, etc., completely customizable

ì Single Board Computer (SBC) with Intel, AMD or

Interface with vehicle control system provides all operating parameters and faults related information to be displayed

ì Windows XP Embedded OS (other operating ì Active matrix color TFT LCD display

Maintenance related display screens

ì In-built power supply with galvanic isolation

Additional sub-systems can be interfaced (using RS232, RS485, ethernet, etc.) such as redundant Vehicle Computer, End-of-Train-Telemetry, Distributed Power Control and other vehicle specific systems

Trip data reset screen

Motoring parameters screen

Rolling Stock Equipment

ARM processors

systems can be supported)

(operates on vehicle voltage)

ì 2 GB flash memory (expandable up to 8 GB) ì Rugged construction to withstand extreme environmental conditions and wide temperature ranges

TE meter test screen

Self test of control system

Driver Desk Consoles

Driver console with TFT screens for 4500 HP, dual cab, diesel locomotive

Driver desk for 3000 HP, cape gauge, out-of- the-frame rebuild locomotive

Medha's supplies drive consoles for applications such

Features

as - 1250 HP to 4500 HP new locomotives, 2200 HP -

Ergonomically optimized layout

3100 HP out-of-the-frame rebuild locomotives, Diesel

Improved functional segregation

Multiple Units, Electrical Multiple Units and Metro

TFT LCD display

Harmonized Driver Machine interface

Standardized displays, independent of application

brake controller, electrical switches, gauges, lamp

Attractive exterior designs

indications and other required components and sub-

Standardized solutions

assemblies.

Cost competitive

Material of construction maybe MS (mild steel), FRP

Optimum utilization of cabin space

(fibre reinforced plastic) or polyester/ phenolic resins

Human safety and comfort considerations

to comply with fire standards for flammability, smoke

Scalable for installation of additional subsystems in future

Cars. These consoles are supplied in ready to install condition with TFT LCD displays, master controller,

and toxicity.

TFT LCD based driver desk for 2600 HP, dual cab, rebuild locomotive

Rolling Stock Equipment

Electronic Governor (for diesel-electric locomotives)

>3500 units operational < 2 year ROI

Closed loop PID control for high precession

Control Unit with control cards

LOP (Lube oil) FOP (Fuel oil) BAP (Boost/Turbo air)

Actuator unit, mounted on engine block (in place of mechanical governor) Linear output of actuator connected to fuel linkage (GE, ALCo type engines) Engine Block

Customerâ&#x20AC;&#x2122;s beneďŹ ts Lower initial investment w Low maintenance cost w Increased battery life of locomotive w No hunting of engine (accurate, precise, repeatable controls) w Extensive fault diagnostics features w No consumables (such as oil, water etc.) w Increased reliability of locomotive w Extended warranty and unit exchange options w No black smoke (fuel limited in case of low BAP) w

Features w Standardized models to suit different engine makes and models w Light weight Actuator <22 kg w Control Unit available with inbuilt display or separate display unit to save driver cabin space w Dry run test for checking fuel rack movement w Driver display information includes Notch, Engine speed, Fuel Rack position, LOP, FOP, BAP, LWP and LCP w In-built engine safety features (low lube oil shutdown, over speed shutdown, low water level protection etc.) w Maintenance free solution to replace, high maintenance mechanical type engine governors

Control Unit houses the control modules. The unit is mounted in the driver cabin. It maintains engine speed as per commanded notch position by controlling the fuel rack position. In-built protection features for fault conditions includes overspeed, low lube oil pressure, actuator failure, etc. protections. VFD Display provides engine parameters and fault messages. Load control signal is provided to interface with locomotive excitation system.

Control Unit with integrated display unit

Actuator Unit mounted on engine block, controls the fuel rack linkage through a stepper motor drive. Minimal moving parts and no lubricating consumables make it a low maintenance system. Rotary output of actuator connected to fuel linkage (EMD type engines)

Rolling Stock Equipment

Common Rail Direct Injection (for diesel locomotives) (Joint Venture with Ganser CRS, Switzerland) Fuel saving: 4-5% for old engines

ROI <3 years

Medha is the first company in India to offer CRDI as retrofit for old engines on locomotives. Fuel injectors are designed to suit existing engineâ&#x20AC;&#x2122;s cylinder head for retrofit and as an integral design for new engines. Design flexibility takes into consideration the number of cylinders, cylinder arrangement, engine speed and power, injection pressure etc. Configurable parameters for adaptation to different engine models.

Engine Control Unit (ECU) with integrated display, keyboard, buzzer and acknowledgment switch

High Pressure Pump

Fuel Injectors

Reduction in harmful emissions 20-30% for old engines Operational Features

Supply includes,

Reduced cranking time

Injectors

Low idle speed control

Pumps

Cylinder skipping at low speeds

ECU (Engine Control Unit)

Individual injector isolation and reduced power operation features

Sensors and Interconnecting Cables

Speed ramp for faster acceleration and deceleration

Interface development with vehicle control system

Fuel, coolant and ambient temperature corrections

Fault logging and fault diagnostics

Low lube oil, engine over-speed, engine fault based engine shut-down, hot engine and lube oil temperature based protections System and components designed to withstand harsh temperature and environmental conditions for railway application of engines

BSFC g/hp.hr

BSFC Comparision CRDI vs Mechanical 300

Mechanical CRDI

250 200 150 100

IDLE

Notch

Rolling Stock Equipment

Guidance for Optimized Loco Driving (GOLD) (Fuel Savings and Emission Reduction) Medha's GOLD is a driver advisory system which helps the loco-pilot to complete the trip with lesser standard deviation from target completion time and with lesser fuel consumption as compared to similar trips on same route without any advisory assistance. LCD display provides realtime optimized speed profile vs current speed profile, advised vs current notch (or braking power) and other track and trip related data to help the driver complete the trip in most fuel efficient manner.  More than 10% fuel saving  More than 10% reduction in harmful emissions  Increased adherence to journey schedule timings  Driving comfort with reduced variation in journey times

 Trip optimization inputs include gradients, curvatures, applicable speed limits, signal post locations, stations and scheduled stoppages, train resistance coefficients, trailing load, train length, route kilometer, target journey time, formation type etc.

Works on principle that pareto front of different driving strategies for a journey plotted on Journey Time vs Fuel Consumed follows an inverse relationship. Any journey can be completed in different time intervals and there will always be one optimal driving strategy which consumes least energy (fuel) for given journey time. Trip completion time is used as basis to generate fuel optimized speed profiles. Depending on the status of completed trip and other completed events, the optimal speed profile changes with trip progress. The original speed profile is dynamically updated to generate optimized advisory speed profile for the remaining trip. Driver completes the trip with lesser standard deviation from target completion time and with lesser fuel consumption, as compared to similar trips on same route without any advisory assistance.

Optimum profile with track details (Gradients and speed limit)

Rolling Stock Equipment

Driver advisory display mounted on locomotive driver desk

Track data is downloaded automatically from internet server at the start of journey and driving performance statistics are uploaded for reporting at the end of journey.

Optimum vs Realtime driving profile

Auto Engine Shut-down (AES) and Auxiliary Power Unit (APU) (Fuel Savings and Emission Reduction) Auto Engine Shut-down provides fuel savings from unwanted loco idling. It monitors the parameters, but does not maintain them to required levels. The savings are substantially enhanced with addition of Medha's Auxiliary Power Unit. APU is a self-contained system with its own small diesel engine coupled to low capacity compressor and alternator to maintain main reservoir pressure, charge battery, operate driver cabin HVAC system and other small loads as per customer requirement.  More than $ 20,250 per locomotive per year fuel savings with APU

 Enclosures are customized to suit locomotive type and space availability

 More than 25% reduction in idling emissions

 Can be installed on new locomotives or retrofitted on old locomotives

 Increased useful life of locomotive engine  APU unit complete with enclosure for indoor or outdoor mounting on the locomotive

Two stage ‘W’ type, splash lubricated and forced air cooled compressor used in APU

Auto Engine Shut-down (AES) Locomotive Idling details (in hours) Before

Idle - 4826:12:22 Notch 2 - 307:18:04 Notch 4 - 233:59:01 Notch 6 - 227:38:34 Notch 8 - 305:23:37

Notch 1 - 520:44:12 Notch 3 - 274:24:35 Notch 5 - 211:33:57 Notch 7 - 350:40:40 Coasting - 1111:40:17

After installation of Medha’s AES/APU system

Idle - 1426:12:22 Notch 2 - 510:18:04 Notch 4 - 253:59:01 Notch 6 - 387:38:34 Notch 8 - 385:23:37

Notch 1 - 905:44:12 Notch 3 - 305:24:35 Notch 5 - 301:33:57 Notch 7 - 380:40:40 Coasting - 1311:40:17

Main engine is shut-down after preset time of locomotive idling. Defined parameters such as battery voltage, brake pressure, lube oil temperature etc. are continuously monitored and incase any parameter is outside the permissible limit, main engine is restarted to bring the parameters back to required levels. The main engine shut-down cycle is continuously repeated to save on fuel consumption due to unwanted loco idling. Timings and parameter values are usersettable to suit locomotive operating conditions.

Rolling Stock Equipment

Passenger Information System (PA/PIS) Medha supplies PA/PIS system and GPS based LED display boards for trains and coaches. Audio system is designed so that the passengers receive relevant information at appropriate times. LED displays are customized using different LED sizes, spacing between LEDs, colors (multi/mono), matrix size, mounting requirements etc. LCD display boards are also available as per customers requirements and specifications.

GPS based LED boards for coaches

PA/PIS system for DMUs, EMUs and trainsets

Special application displays mounted inside and outside the passenger coaches with inbuilt GPS receiver, these displays work independently without requiring any train wide communication network or interconnection between coaches.

Integrated and interactive audio-visual system

All displays of a train can be simultaneously configured with radio frequency based remote control unit. Inside coach displays give audio-visual intimation of distance to go and estimated time to next stop. Outside displays provide car and train related information. Real time GPS information, pre-stored railway network map data and pre-stored messages are used to provide audio-visual messages for passengers.

Scalable system to suit train configuration Driver HMI interfaced PSU controller is linked to driver mic, cab loudspeakers, train radio, location referencing equipment and to the train wide communication network (Ethernet, CAN, RS-485, etc.) PCC (PIS car controller) receives information from PSU to generate audio-visual messages Ambient noise monitor provides for automatic audio volume control of announcements Passenger-Driver emergency communication units are provided Pre-recorded and direct announcements from driver cab to passengers Communication between - driver and guard, driver and passenger, operational control center and driver, operational control center and passengers

PA/PIS system with audio visual announcements

Rolling Stock Equipment

GPS based LED boards (stand alone type)

HVAC Controller Medha supplies HVAC controller unit for Metros for countries like USA which demands car inside temperature to be maintained within a narrow temperature range under conditions where the ambient temperature ranges from sub-zero levels to hot wether conditions. An advanced close-loop temperature control algorithm is used to achieve this temperature uniformity for passenger comfort. The unit controls the switching ON/OFF of air-conditioning and heating unit within the cabin. Temperature sensing within the cabin is distributed to compensate for localized fluctuation of temperature due to frequent opening of doors. Ambient temperature variation as per geographical location defines the capacity and rating of HVAC unit.

 Designed as integral part of HVAC control panel

 Configurable set points through USB interface

 Sized to match available space and location in case of replacement projects or retrofit solutions

 Events and errors are logged with data along with time stamp

 Compact unit for easy installation within the HVAC panel on passenger coach

 Optional wired remote indicator for monitoring

 Modular construction for easy service, maintenance and scalability  Flexible serial bus communication interfaces for seamless integration with train network  Available with localized operational control and/ or with remote control unit for remote operation

 Built-in diagnostics and test modes for easy testing and troubleshooting  Quick response time for compressors and heaters safety  Rugged construction to withstand harsh railway environment

The controller unit is packaged to fit into the available space in case of retrofit.

Remote Indicator Module

HVAC Controller Unit with status display LEDs

Rolling Stock Equipment

Fuel Level Sensor Fuel Level Sensor is mounted on fuel tank of diesel locomotives and is interfaced to the control system which hosts the algorithms to calculate the fuel level and consumption

Ultrasonic frequency based, Fuel Level Sensor

Fuel consumption monitoring with Medha’s Remote Monitoring System

 Ultrasonic frequency based non-contact sensor

 Real-time accurate information of fuel position

 Fuel level and consumption related information can also be viewed online over internet using Medha's Remote Monitoring system

 Trip based fuel consumption calculations  Safety against fuel pilferage or theft

 Calibration procedure to accommodate for different size, shape and volume of fuel tanks

 Correction of errors due to gradient, curvature, tank shape lead to high accuracy

 Intelligent algorithm for compensation for errors due to gradient, curvature, vibration

Vigilance Control Device (Driver Alerter) Medha's VCD is a multi-resetting type, standalone safety device which detects the driver’s alertness through normal driving actions and provide audio-visual alarm, followed by automatic brake application incase the driver is incapacitated or is unable to perform normal activities.

Driver Alerter Unit for Electric Locomotives Brake application solenoid

Driver Alerter Unit for Diesel Locomotives

 Microcontroller based system  Can interface with vehicle control system  Electro-mechanical, penalty brake application counter  Sealed isolation switch to bypass Alerter

Pre-defined set of driver actions considered are § changes in master handle position (powering or dynamic

braking)

§ pneumatic brake application § operating of locomotive horn § sanding § pressing of alerter reset button and § other actions as per customer specifications

Rolling Stock Equipment

Speed Recorder/ Event Recorder (Digital Event Recorder) Medha's Speed-Time-Distance Recorders and Event Recorders are available in different models based on type of propulsion vehicle. A digital system, it provides online speed indication, records travelled distance and other parameters. Energy consumption monitoring option is available for Electric locomotives and EMUs. Event Recorders are supplied complete with speed sensor (axle or traction motor mounted), voltage and current sensors (for energy consumption recording in electric vehicles), junction box, interconnecting cables, non-volatile memory card and PC application software.  Very accurate, microprocessor based system  High reliability and maintenance free operation

 Speed sensor with inbuilt redundancy and automatic change-over

 Non-volatile flash memory

 Digital display of speed value in case of analog display failure

 Audio-Visual over-speed alarm, user-settable threshold

 User friendly application software for settings, data download and analysis

 Self-Diagnostic feature to check system health Indicator units are provided for second cab in dual cab vehicles. It takes input from recorder unit. The recorder unit has memory freeze feature to freeze data recording for further analysis, incase of eventualities.

Speed-Time-Distance and Event recorders and indicator units with speed, voltage, current sensors and junction box

System Details

Recording Modes

Accuracy of recording : +/- 0.8%

Time based : data recorded at 20 sec intervals, user-settable between 1-120 seconds

Speed indication accuracy: +/- 0.8% Odometer in km: 8 digit, accuracy +/-1 km Wheel diameter adjustment: in 1 mm steps Optically isolated, reverse polarity and surge protected inputs and outputs Communication: RS485 for indicator unit, RS232 for PC, USB for data download, others as per customer requirement

Distance based : distance recorded at every 400 metres travel, user-settable between 20 – 4000 metres Speed based : data recorded whenever speed changes by +/- 5 km/h, user-settable between 1– 10 km/h Event based recording : a combination of inputs recorded as events

Data Entry: keyboard on recorder unit Recorder unit weight : 4.5 kg

Rolling Stock Equipment

Dynamic Brake Resistor (DBR) Medha supplies different types and ratings of DBR grids complete with blower motor and structural section for ease of mounting on the vehicle. DBRs are designed to continuously convert and dissipate rate amount of energy (generated because of braking) ranging from 1500 kW to 3000 kW, depending upon type, make and model of locomotive. Cooling blower (inclusive part of DBR package) will run either from the generated electrical braking power or from auxiliary power supply. Offered DBRs are suitable for Diesel AC or DC traction) and Electric (usually DC traction) locomotives. In diesel locomotives, DBRs are also used for self-load power testing of engine and alternator, without needing external load bank.  Different designs to suit vehicle requirement (radial type, roof mounted type, underframe mounted)  Compact, light weight and rugged construction to withstand harsh working conditions  Suitable for locomotive ratings from 2000 HP to 6000 HP  Power dissipation 1500 kW to 3000 kW

 Natural air convection or forced air convection  Modular design for ease of installation and maintenance  Models for GE, EMD, ALCo type locomotives  Customized designs for other make and model of locomotives  In-house test facilities include 87 feet long wind tunnel for blower air flow testing

 Highly efficient and durable braking resistors made of special alloy material

Grid cooling blower

Complete assembly of Dynamic Brake Grid

Assembled in loco Brake Grid module

Low initial investment and product life cycle cost Reduced assembly and DBR installation time DBRs are also supplied as complete assemblies (including 6 or 8 set resistor bank, AC or DC motor and cooling fan or blower) such as è Ready to assemble, complete short hood fitted

with DBR and cooling fan

è Ready to weld roof section, pre-fitted with DBR

grids and cooling fan

Rolling Stock Equipment

DBR packages are available as standard models for locomotive repowering projects and are duly customized / designed to suit locomotive layout and space availability in case of new locomotive building or upgradation of old locomotives.

Signaling

Electronic Interlocking System Axle Counters Train Control System Block Proving Axle Counter Integrated Power Supply

44 46 48 50 50

Electronic Interlocking System for Signaling (CENELEC SIL4 safety standard) Medha's Electronic Interlocking System is a modular, fail safe and configurable signaling system which meets CENELEC SIL4 safety standards. System has large vital input/output capacity and can be installed on a small or large station as a centralized or distributed installation with option to have centralized control to control multiple stations in a line section. Vital OFC communication between vital sub-systems can cover a range of upto 120 km, without needing repeaters. Medha's signaling system can interface with other systems such as ATP, CTC and other station equipment such as axle counters, data loggers etc.  Low initial investment even with different station sizes  Modular design for ease of maintenance and expansion  Improved safety and efficiency of railway network with system capability to handle heavy traffic  Customer friendly desk type panel processor or PC based Graphical User Interface

 Online fault and event logging with troubleshooting guidance through maintenance terminal and remote monitoring  Technical training, offline and online after sales support and other user friendly, service support packages  Interlocking based on Boolean logic leading to faster design, verification and easier alteration

Features



Communication and Interfaces The communication between all the subsystems on redundant OFC channels for ensuring high availability even in harsh railway environment



Additional features/capabilities Direct Lamp driving Direct Input reading OC (object controller) placement near point of control in case of distributed functions

Counter Box to record emergency cancellations done manually

Signaling

Yard Signaling Control Room (at station)

Vital processing by safety proven microcontrollers microcontrollers 2oo2 (two-out-of-two) architecture with full redundancy

Provision for interfacing with any new substystem with open protocol interface



Safety Features

Primary and secondary negation of faults



Extensive Fault Diagnostics and Data analysis Each and every fault is identified and indicated to the maintainer, along with the suggested corrective action Networking of Maintenance Terminals

PC based VDU

Lightning Arrester ESE Type

Maintenance Terminal

Visual Display Unit (VDU) for real time route setting and status feedback of yard

LEC

4 SIL

é Operator Commands ê Yard data Indication

Object Controller (OC)

Points/Switch ç Point Status è Point Commands

Signals ç Signal Commands è Signal Status

Axle Counters ç Track Occupancy Status

Track Circuits ç Track Occupancy Status

Central Interlocking Unit (CIU) Interlocking Data Exchange

Other EIs Operator Interface

ç Block Status è Block Commands

Block Instruments

é CTC commands ê Yard Status

Centralized Traffic Control

è Output Commands ç Input Status

LC Gates Crank handles Ground Frames/Sidings

Object Controller (OC)

 Adaptability 2oo2 architecture with 100% hot standby and automatic changeover Includes all interlocking features such as route setting, route release, point operation, track occupancy monitoring, overlap protection, crank handle operation, level crossing gate operation, block working etc. Fixed and faster response time for all operations, irrespective of station size or complexity

Modular and highly flexible system for easy adaptation to different types of station layouts, configurations and signaling norms Single system capable of controlling yards upto 800 routes Even bigger yards can be controlled by cascading more interlocking units

Implementation Option to select between Centralized or Distributed system layout to suit yard conditions Redundant, optical fibre communication between CIU and OCs Short commissioning time No maintenance requirements

Modular architecture offers easy scalability and faster upgrades MEI 634 - a modular Interlocking system which can handle from 64 to 2200 vital inputs/outputs. Can be installed as wayside equipment in the yard or for bigger system in the Station Equipment Room.

Signaling

Single and Multi Section Axle Counter (CENELEC SIL4 safety standard)

Reliable wheel counting with fail-safe occupancy detection. Medha’s Single Section Axle Counter (SSDAC) and Multi Section Axle Counter (MSDAC) overcomes track circuit limitations in situations including - water logging or flooding, metal bridges, long block sections, yards with poor wheel shunt lines, high EMI/EMC environments, tunnels, high temperature and sunshine regions, complex and large stations and yards etc.

 Suitable for main line, metro and high speed applications

 Cost effective  Zero maintenance system

 Web-mounted sensors for reliable operation

 Suitable for different types of Rail profiles

 Easy to install without needing any additional equipment

 Standalone systems, not dependent on type and make of Interlocking

Single-section Axle Counter (SSDAC)

Multi-section Axle Counter (MSDAC)

2oo2 architecture Ÿ Hot stand-by communication over diverse media for higher availability

2oo3 architecture § Can evaluate upto 40 detection points and monitor upto 39 sections § Can cater to bigger stations or marshalling yards with cascading feature

Configurations (SSDAC) Ÿ One detection point – Single section (1DP-1S): Typically used for sidings Ÿ Two detection points – Single section (2DP-1S): Straight line sections Ÿ Three detection points – Single section (3DP1S): Point zones. Ÿ Three detection points – Two consecutive sections or Auto-Section in a straight line (3DP-2S/AS)

Configurations (MSDAC) All configurations of SSDAC are covered in addition to below § Multiple detection points - Single section: Ladder § Consecutive single sections in a straight line segment and various other situations § Complex yard/station can be configured by user friendly GUI Yard Configuration Tool

Signaling

Wheel diameter range 380mm to 1092mm Wheel speed upto 300kmph

Sleepers: wood, steel, concrete, composite

Digital Axle Counter Unit Supports hot swapping of cards

e s fil kg ro / 52 il p s Ra 0kg 6

Wheel sensors IP68 protection

/9 0R

Two sensors working on electromagnetic field detection principle

Digital Axle Counter Reset Box Wheel counter with 4x20 dot matrix display

Installation § § § § § §

Replacement of existing track circuit with digital axle counters During station upgradation Construction of new stations Track length expansion Addition of new lines Upgradation of signaling system to computer based system

Visual Display Unit

Diagnostics Terminal

Electronic Interlocking Unit

Central Evaluator

Supply package Includes Ÿ Ÿ Ÿ Ÿ

Reset Panel

Wheel sensors Field units Central Evaluator Reset panel, VDU, DT and interconnecting cables

Line Verification Box

Compliance to International Standards DPFU 1

EN 50121, EN 50126, EN 50128, EN 50129, EN 50159

DPFU 2 Axle Detector

DPFU 40 Axle Detector

Axle Detector

Signaling

Train Control System (TCS) (Train Collision Avoidance System – TCAS) Medha's Train Control System (TCS) allows safe movement of trains within the Station vicinity and in Block Sections and prevents any train collision which can be caused due to overshooting of traffic signal (Signal Passing at Danger). TCS comprises of Station TCS and Loco TCS systems. Station TCS includes a wide network of RFID tags to specify the exact location of train. Aspect of approaching signal and movement authority is communicated to the approaching train. Loco TCS on the train, upon receiving these inputs, will calculate the required speed limit based upon distance-to-go and will accordingly control the train speed using brake application, if required.

 Economical compared to ETCS solution

 Safety against train collision due to human error

 Features superior to ETCS Level 1

 Ensures safe train operation under low visibility weather conditions

 Specified Interoperability requirements and interoperability testing requirements

 Enforce temporary and permanent speed restrictions

 Full fledged ATP solution with SPAD protection

Features Communication and Interfaces

Safety Features

Full duplex UHF radio communication between station and train; Hot standby radios for higher availability; GPS interface for network time synchronization; GSM interface for fault data transmission to central server;

Vital processing by safety proven microcontrollers; SPAD (signal passed at danger) prevention; Loop line speed control, section speed and permanent speed restrictions supervision; Temporary speed restrictions supervision; Head-on, rear-end and side collision prevention; Standstill, reverse movement and roll-away protection; Manual and automatic SOS; Automatic train length computation;

Crew Friendly Features Cab signalling on driver machine interface (DMI); Level crossing gate alert to loco pilot with automatic whistling; Loop line clear indication; Crew protection alarm;

Station TCS control unit interface to station signaling system, TCS VDU unit, and TCS SOS unit for manual override of system.

Signaling

Dipole antenna and modem for UHF (450-500 MHz) radio communication between loco and station TCS control units.

Fault Diagnostics & Data Analysis Real time display of train position; Centralized data analysis for all TCS equipment stations and locos;

Vehicle TCS unit in Locomotive control panel and DMI (Driver Machine Interface) 10.4” TFT LCD display on driver desk. TCS unit antennas mounted on loco roof.

RFID tags installed between the tracks at a maximum distance of 1km. RFID reader mounted underneath the locomotive.

RADIO STATION ANTENNA

GPS & GSM ANTENNA

SIM OCP VDU

RADIO ANTENNA

STATION TCS CONTROL UNIT

Point/Switch status Track occupancy status

GPS & GSM ANTENNA SIGNAL ASPECT RELAYS

BRAKE INTERFACE UNIT

ONBOARD COMPUTER

RFID TAG READER

LP OCIP

SIGNAL POST

RFID TAGS

Fail safe modes § 2oo2 architecture for vehicle unit § 2oo2 architecture and hot standby for radio, GPS, and GSM in both station and vehicle units § Full ATP function § Station unit can identify collision situations even if interlocking makes a mistake § Redundant radios for communication

No Brake Application as long as speed is within permissible limits.

DMI (Driver Machine Interface) Information to Locomotive Driver § Simple interface – does not need continuous attention § Distance to go, upcoming signal aspect, current speed (and limit), operating mode and other driver relevant information

Application of brakes to control speed when speed exceeds permitted speed.

Signaling

Block Proving Digital Axle Counter (BPAC) (CENELEC SIL4 safety standard; 2oo3 architecture) Medha's BPAC system ensures that the track section is empty before permitting another train in that section, eliminates human error and controls safe movement of trains between stations. No train is permitted if there is any other train, parted train, detached wheels, rail trolley or other rail vehicle in that section. Solid State Block Proving Digital Axle Counter (BPAC)

 Standalone system - not dependent on type and make of interlocking  Can be used for Single or Double Line block section  Very low power consumption  Communication compatible for Quad cable, voice channel over OFC or dedicated OFC  Withstands adverse environmental conditions

Operator Annunciator Panel for Stations

 Audio-visual intimation and acknowledgment feature for both end stations  Automatic functioning without human intervention

Integrated Power Supply (IPS) Medha’s IPS system provides un-interrupted steady voltage power supply to signaling system to safeguard against power interruptions and high voltage fluctuations.

 Single system sufficient for full signaling power requirements of up to six line station  n+1 redundant configuration, paralleled supplies  Modular and rugged construction to withstand harsh environmental conditions  Works with AC supply and battery  Both AC & DC output as per signaling system requirements and ratings  Surge, over load, over voltage, under voltage, short circuit and other protections

Signaling

Medha’s Research & Design Centre Medha is an R&D focused company with over 30 years of experience in designing and manufacturing components and systems for railway applications. In India, Medha is credited with reputation of having designed many high technology products and systems for the first time in the country. The range includes Vehicle Control System, Electronic Governor, Vehicle Remote Monitoring, IGBT Traction Converters, Electronic Interlocking, Train Control System, Common Rail Direct Injection and many more. Medha also leverages its capabilities to design products and systems to suit customer specific requirements. Product cost competitiveness, short implementation times, ruggedness to withstand railway conditions, low life cycle costs, are some of the underlying guiding principles for product designs. All designs pass through internal validation and verification before being released for field trials and commercial operation. With highly skilled technical team of over 600

design engineers, and corporate financial commitment to reinvest upto 15% revenue into R&D activities, continuous product improvement and new product innovation is an ever going activity at Medha. Medha's R&D centre at Hyderabad in India, is spread over 4 acres with over 18,000 m² builtup space housing various labs. Centre is equipped with latest software tools and testing facilities to support product development. Most of the customized test benches are unique to suit the product application for railway environment. Medha also has one of its kind facility for propulsion system integration testing with 25 kV OHE supply from railways. Medha is guided by well laid down quality norms and procedures for all stages of design and development activities. Award of quality certifications such as IRIS, ISO 9001:2015 and CMMI Level 3 are testament to Medha’s quality in product development. These achievements are not stopping Medha from working towards achieving higher quality certifications including CMMI Level 5.

Medha's Production Facilities Medha's facilities at Hyderabad, India, are spread over 15 acres, with over 49,000 m² indoor space, housing production equipment and assembly lines. Over 1600 dedicated people work with SAP ERP enabled processes, using lean manufacturing practices to meet on-time delivery requirements. Stringent quality controls starts right from step one, when the material is received from the suppliers. In spite of special care being taken in selection of supplier, all inwards goods still undergo 'Inward Goods Inspection' before reaching the stores or production area. In most cases 100% inspection is carried out with sampling inspection for other components. Mechanical manufacturing facilities are equipped with latest CNC machines and automatic lathe, drilling, milling, presses, gear hobbing and other product speciﬁc special purpose machines. High precision mechanical products and components are manufactured in-house, in-line with our corporate quality policy. Medha designs its own electronic Printed

Circuit Boards (PCBs) for all requirements. PCB assembly line is equipped with fully automated radial, axial and IC component insertion machines, high performance pick and place machine for surface mounted devices (SMD), wave soldering machines for leaded components, re-flow oven for SMD, automatic optical inspection machine. PCB manufacturing and testing areas are ESD protected and equipped with air filtering. Products and systems are subject to subassembly and assembly level testing to ensure their reliable operation in the field. Extensive test facilities for each product includes exhaustive functional testing using customized test benches and aging tests at elevated environmental conditions. Dedicated training department caters to our ever growing need for personnel knowledge and skills upgrades and to take knowledge of our latest products and technologies to our reputed clients. Newer technologies, production processes and systems are regularly studied and implemented to ensure continuous improvements in manufactured products.

For a Good Cause At Medha, we go beyond the basics of ethical business practices and embrace our responsibility to the society. As a company that believes in technology and strives on innovation, we see the importance of helping the upcoming generation, who will be the backbone of the Indian society and responsible for growth and prosperity of the nation in the coming years. In 2006, Medha started Medha Charitable Trust, which focuses on uplifting of students from economically weaker section of society and helps them in completing their education. Medha has pedged to fund the Trust with up to 20% of its annual profits. By the year 2016, the Trust donated text books to over 2.2 million students. By the year 2018, the Trust sponsored secondary high school and graduate college eduation to about 350 students. By the year 2018, the Trust sponsored technical courses to become industry ready to about 120 students.

Students sponsored for Secondary High School Education `and Technical Courses

Adding smiles, year after year

Empowering the future

MEDHA SERVO DRIVES PVT. LTD. 2-3-2/A, Cherlapally, Hyderabad - 500 051, India Tel: +91-40-67237000 sales@medha.com www.medha.com