ABSOPULSE 3kW Power Supply with Inherent Redundancy for Critical Railway Trackside Applications

ABSOPULSE Electronics has released the PFC 3KR-E/110-3U3, a rugged AC-DC power supply designed for 3kW railway trackside applications that require redundant operation and power factor correction (PFC).

The PFC 3KR-E/110-3U3 employs active power factor correction to convert 230Vac (195-264Vac operating range) to 110Vdc/27A. Custom I/O voltages are available on request. The power supply complies with EN61000-3-2 and EN61000‐3‐12 directives for low input harmonic distortion. Power Factor is better than 0.97 at full load for the entire input range.

The unit functions as a redundant power supply, ensuring high system reliability in critical applications. It is built with three PFH65F internal modules, connected parallel via built-in redundancy diodes. If one internal module fails, the system will remain operational at 2000W output power.

The PFC 3KR-E/110-3U3 meets the requirements for EN50155 for electronic equipment used on railway rolling stock. The units are equipped with heavy filtering on the input and output and comply with EN 50121-3-2. They also meet EN 50121-4, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4 and EN 61000-4-6. Electronic protection includes 4300Vdc input-output isolation, inrush current limiting, overload protection, thermal shutdown with automatic reset in case of insufficient cooling (self-resetting) and current limiting.

High quality built-in fans provide sufficient cooling for operation over a 0°C to 50°C temperature range for full specification without derating. Wider temperature ranges are available on request. The unit is ruggedized for immunity to shock and vibration and the internal boards are conformal coated for protection from moisture and airborne contaminants.

ABSOPULSE Electronics is an original equipment manufacturer (OEM) specializing in the design and manufacture of heavy-duty switch-mode power conversion products for the railway, automotive, industrial automation, power utilities, mining, marine and telecommunications sectors.

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