Underslung Converter IGBT Based 25kVA for SG Coaches

Developed Underslung Static Converter IGBT-based 25kVA. The product, exclusively developed for railway passenger coaches.

Compliant Standards: IEC 60571, IEC 61287-1 and IEC 60310.

Under carriage mounting of converter saves space for 2 extra berths inside the coach, enhancing revenue earnings.
Under carriage mounting also prevents noise pollution, adding to passenger comfort.
Sturdy MS / SS sheet fabricated enclosure, with special protective surface treatment, makes it ideal for under carriage mounting.
IP 65 protection makes the enclosure impervious to water, even in flood situations.
High efficiency leads to low power consumption.
Being naturally cooled the converter does not require any moving parts for cooling. This enhances life and reliability.
Vacuum pressure impregnation using 'H-class' resins for filter inductors makes it ideal for traction duty.
Maintenance free, being fully static.
Converter's modular design makes it easily accessible through side panels and affords easy maintenance.
State of the art DSP based system.
Fault logging facility for ease of maintenance.
Data transfer through serial communication between onboard display and underslung converter.
Control and monitoring through onboard interactive VFD panel.
PC interface facility for downloading of logged data and online monitoring.
Converts 110V DC supply of the coach batteries into 3-phase 415V, 50 Hz AC.
Feeds 3-phase stabilised power to the loads of the passenger coaches, viz., Air Conditioning, Lights, Ventilation, Pantry, and the like.
Coach Wheel / Axle driven alternator rectifier system charges the batteries.

Features	Values
Output capacity	25 kVA
Output Voltage	415V ±5%, 50Hz ±3%, 3-phase PWM sine wave
Current harmonics at full load	Less than 5% up to 20th harmonic
Efficiency at full load	≥ 92%

Features	Values
Supply voltage	77-140 V DC

Features		Values
Operating ambient temperature		5°C to 55°C
Cooling		Natural cooled
Mounting	Main cubicle	Under carriage
Mounting	Display panel	Onboard at the entrance of the coach
Size: main cubicle		1630 × 1040 × 724 mm
Weight (including display cubicle)		540 kg

Applications

Converts 110V DC supply of the coach batteries into 3-phase 415V, 50Hz AC.
Feeds 3-phase power to the loads, viz., Air conditioning, Lights, Ventilation, Pantry, and the like of the Passenger Coaches.