Medha Transportation LLC

Vehicle Control

Advanced System for Locomotive Control and Fault Diagnostics

more than 4,000 units in operation
>20% increase in hauling capacity
>15% reduction in loco assembly time
4 years warranty and AMC options

Scope of Supply:

Main control unit

1 No.
TFT LCD display unit

1 No.
Speed sensors

2 Nos. (engine speed) + 6 Nos. (axle speed)
Current sensors

6 Nos. (TM current) + 1 No. (battery charging current)
Voltage sensors

1 No. (alternator voltage) + 1 No. (battery voltage) + 1 No. (aux. generator voltage)
Pressure sensors

1 No. (main reservoir) + 1 No. (brake pipe) + 1 No. (brake cylinder)
Temperature sensors

1 No. (water) + 1 No. (ambient air)
Interconnecting cables

with cable harness and connectors at both ends)1 set (lengths to suite locomotive model
Supervision services

Supervision services for installation and commissioning
Schematics

diagrams for electrical panel and locomotive
Manuals

Operation and maintenance manuals
Application software

(to run with any version of Windows)
Login details

for online locomotive monitoring and fault data management
Remote support services

automatic email messages for faults: fault data-pack analysis reports;

Customer Benefits
- Superior wheel-slip control (upto 45.13% achieved by our customer)
- Increase in haulage capacity
- Automatic calibration of wheel diameters
- Starter protection
- Battery life enhancement
- Locked axle, Pinion slip, Wheel slide identifications and protection
- Cooling System
- Auto-engine-start
- Dynamic Grid protection
- Reduced electrical components on loco (almost 80+ components eliminated from GP38 or SD40-2 loco
- Fault Data recording, direct download on office computer or download from the locomotive
System Features
- Highly improved reliability and availability of locomotive with reduced maintenance needs
- Digital setting of all parameters (with wide range of user-settable parameters so that the system can be easily adapted to any make or model of locomotive without needing software or hardware changes)
- Excitation control : precise control of traction alternator (main generator) to maintain constant horse power
- Continuous self diagnostics of system modules and sensors to easily separate system faults from locomotive faults
- Vigilance control device (multi-resetting type dead driver control) is a standard feature already included in the system
- Dynamic Brake Control – Normal and extended DB
- Propulsion control (transition control series, series-parallel; Cranking control; Engine rpm control; Cooling fan Control; Air Compressor Control; Sanding control; Vigilance Control;)
- Engine priming before cranking (if the feature existis in the engine)
- Headlight control (monitors and records headlight inputs)
- Operates alarm buzzer for critical faults (as per customer requirement)
- Memory freeze or data freeze swtch (to stop data recording or overwriting in case of accidents)
- Provision for speedometer (accurate measurement of loco speed based upon TM gear mounted speed sensor or axle mounted speed sensor)
Traction Motor Protections
- Each traction motor independently protected against over-current and short-term currents failures
- automatically avoids overload to existing motors incase of motor cut-out or motor failure
- TM currents are limited to safeguard the TM insulation and wiring
- Wheel sliding and locked axle are identified and excitation controlled to protect wheels & traction motors and to prevent derailing
- Traction Motor flashovers identification automatically TM cut-out
- During dynamic braking at high speeds, armature current limitation to avoid damage to traction motors due to commutation limits
- TM high current and TM circuit open faults identification and automatically isolation of TM
Fuel Consumption Reduction
- High Idle function (maintain engine temperature in freezinng conditions)
- Low Idling feature
- Auto correction of HP @ site conditions
- Additional traction HP with auxiliary load cut-in / cut-off
- Notch 8 fuel Economy
- Power Setter feature (MU operation)
- Smart MU (consist manager) (optional)

Automatic test Modes to check normal working of traction equipment and electrical components

Self Load Test (to check engine and alternator performance)
Auto Test for Relays and Contactors (to test working of all relays and contactors)
Test for Digital Inputs and Outputs (to test all inputs connected to the MEP system)
Radiator Cooling Fan Test (to check working of radiator fan)
Meters Test (to test load ammeter and speedometer functionality)
Excitation Test (to check excitation circuit for main generator and auxiliary generator excitation)

MEP system will retain all safety features existing on the locomotive and also Implements additional safety features such as LWS protection; low lube oil protection; engine over-speed protection; high voltage ground detection and protections; protection against contactor malfunction, including contact tip weld; hot engine protections (power deration or faster cooling); protection against reversing at high speeds;


Countries: Indonesia, Thailand, Myanmar, Tanzania, Zambia, Mozambique, India... Locomotives: EMD (G26MC model), Alstom (AD3400 model), YDM4 mode, GE (Class88 model)...

Vehicle Control

Advanced System for Locomotive Control and Fault Diagnostics

Medha Transportation LLC

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