3kW High input voltage railway DC-DC converters for mass transit and mining vehicles accept 750Vdc input (525V to 975Vdc)


3kW High input voltage railway DC-DC Converters operate from an input of 750Vdc (525V to 975Vdc range), the traction voltage for mass transit vehicles and mining locomotives.

The HVI 3KR-3U4 series of high input voltage railway DC-DC converters employ field proven design topology to generate 3kW output power. They accept 750Vdc input (525V to 975Vdc range), which is the traction voltage typically required for mass transit vehicles such as trams, metros and light rail and mining locomotives. The units are capable of 1200Vdc peak input. Single output voltages available include 24V, 36V, 48V or 110Vdc. They meet EN50155 for electronic equipment used on railway rolling stock.

The railway units have heavy filtering on the input and output, and comply with EN50121-3-2. The converters also meet EN61000-4-2 (ESD), EN61000-4-3 (RF Immunity), EN61000-4-4 (Fast Transients), and EN61000-4-6 (Conducted Immunity). The design is verified for 5600Vdc input to output isolation.Other protection features include 4300Vdc input-output isolation, reverse polarity protection, overload protection, thermal protection and current limiting.

All converters in the series are heavily ruggedized for immunity to shock and vibration. The internal boards are conformal coated for protection from moisutre and airborne contaminants. The units are rated for operation over a -25°C to 55°C temperature range for full specification with no derating required. Requirements for wider temperature ranges can be accommodated on request. Cooling is provided by two high quality built-in fans. All heat generating components are installed on aluminum heatsink blocks which are thermally connected to the internal heatsink plate. In addition to cooling, this also contributes to mechanical robustness of the units.

An industrial quality version of this design, the HVI 3K-3U4 series, is also available.

ABSOPULSE Electronics is an original equipment manufacturer (OEM) of an extensive range of railway and industrial grade power conversion solutions. We specialize in fully custom solutions. All of our existing designs can also be modified to meet customer application requirements.

Key Specifications

  • 3000W railway quality converters;
  • Meet EN 50155 for electronic equipment on railway rolling stock;
  • Input: 750Vdc nominal 525V-975Vdc operating range;
  • Output: 24V, 48V, 110Vdc or custom;
  • ±1.5% combined from zero load to full load;
  • Inherent redundancy – can be used as 2000W power supply;
  • Conformal coated internal boards;
  • -25°C to +55°C operating temperature range;
  • EMI: EN50121-3-2;
  • 3U4 chassis: 132 x 244 x 407 mm (5.2″ x 9.6″ x 16″) H x W x D.

Data sheet – HVI 3KR-3U4 DC/DC converter (Railway)

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