Axiliary Converter feeds all the auxiliary systems on the train like lighting, air conditioning, battery charging, control and other onboard systems, etc.
The output from the DC to AC auxiliary converter is 3-phase AC at standards voltage with or without neutral output and is used for train lighting and the AC motors of air conditioning fans and compressors. The 3-phase is also converted to DC by the rectifier which provides current for battery charging and DC loads.
Also there are battery charges in a separated boxes, which operated from the catenary voltage (DC) or from AC standard voltages.
With more than 29,000 converters supplied worldwide for various input voltages and output powers (up to 450kVA).
SEPSA develops and manufactures static converters with different power electronics topologies and ventilation modes that allow a high degree of customization in order to comply with the highest demanding requirements of the railway industry.
Converters designed for working in a wide range enviromental conditions: tropical environments (Taiwan and Hong Kong), cold climates (Russia) and hot climates (Spain and Morocco).