Pre-cooling Unit Cum Charger IGBT based front end 30kW. The DSP based system works in four different modes to meet the requirement of SGAC coaches for Indian Railways.
IGBT based rectifier to obtain input power factor close to Unity (0.99).
Low noise level smaller than 65 dB.
Very low voltage and current ripples smaller than 2%.
Facility to receive data via RS 232 communication on laptops for online data monitoring.
With onboard display unit to change the working mode and check the status of unit.
Capability to charge battery in constant voltage as well as constant current mode for different type of batteries (VRLA and LMLA with different current hour ratings).
Applications
The product is for under-slung fitment in self generating air conditioned coaches primarily for precooling the air conditioned coaches at the yard / station and charging the batteries (VRLA or LMLA fitted in Coaches).
Technical Specifications
A. Input
Factors
Values
Nominal Voltage
415V ± 15%, 3-Phase AC
Frequency
50Hz ± 3%
Power Factor
0.99 (At Rated Current)
B. Output
Factors
Values
Output Power
30kW maximum
DC Output Voltage
100 - 155 VDC
DC Output Current
220A
Operating Modes
System works either in constant voltage or constant current mode while charging the Battery exclusively. In pre-cooling mode unit works as constant voltage. Modes selections are with external keyboard.