Redundant AC/DC rack-mount power system features plug-in modules to deliver up to 5-kW

April 04, 2012 // By Paul Buckley
Absopulse Electronics' PFC 419F-5K-4U19 Series is a modular, ac/dc rack-mount power system with power factor corrected input. The system is suitable for heavy-duty industrial applications including power utilities, telecommunications and industrial control equipment.

The system is constructed with up to five 1 kW plug-in power supply modules assembled in a 4U x 19 inch x 15 inch card-frame. Each 4U x 16HP x 304 mm plug-in module has a built‐in redundancy diode for parallel connection or N+1 redundant operation, including hot‐insertion. The redundancy diode also allows for a battery to be connected to the output for back-up purposes. The fully loaded PFC 419F-5K-4U19 system delivers a maximum of 5 kW or 4 kW with N+1 redundancy.

The plug-in modules each employ a power factor corrected input and a following half-bridge stage to convert the universal ac-input voltage (95-264 Vac) to 24 Vdc, 48 Vdc, 110 Vdc or 125 Vdc. Custom input/output voltages are available. The modules include a module fail alarm with optocoupler output, summarized into a single Form C alarm on the shelf motherboard. The front panel of every module has an output ON LED indicator, with test points for monitoring output voltage and voltage adjustment potentiometers available as options.  

The modules comply with EN/UL60950 and equivalent industrial safety standards as well as the EN61000-3-2 directive for low input harmonic distortion. They are filtered to meet EN55022-A EMI standards with large margins.  Efficiency at full load is typically 80%. Protection features include 4300 Vdc input to output isolation, output current limiting with short-circuit protection and thermal shutdown with self-resetting. Cooling is by two high quality built-in fans on each plug-in module.

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