Ontario, Canada—Absopulse Electronics’ 3PFC280-24BR is a modular AC/DC power supply with power factor corrected (PFC, to 0.97) input designed to meet the stringent requirements of railway signalling, communications and train control systems. It's also suited to other harsh-environment applications where electromagnetic compatibility, high operating temperatures, condensation, and rugged construction are important considerations.
The 3PFC280-24BR, working from a universal AC input, comprises three plug-in modules in a 3U-by-19-by-13 inch chassis to provide up to 600 watts, or 400W with N+1 redundancy. Each plug-in module provides 24 volts at 8.3 amps, with a maximum current output of 25 amps for 3 modules or 17 amps for N+1 redundant operation. Each of six distribution breakers located on the front-panel are equipped with an alarm contact, and the breaker alarms are summarized into a Form C output to indicate tripping. A second Form C alarm output is provided for the plug-in module alarms.
Other features include a line/load (combined) regulation of ±2 percent from 10 percent to full load, audio band noise of 32 dBmc (maximum), efficiency of 80 percent (minimum) at full load, and MTBF of 150,000 hours at +45°C for each plug-in module.
The system is rated for full specification at 0 to +70°C with forced air cooling (cabinet fans), and to +50°C with convection cooling. Conformal coating provides protection against high levels of humidity. The supply is filtered to meet the requirements for EN55022 Class B EMI emissions as well as the immunity criteria specified under EN50155 and EN50121-3-2.
The datasheet is available from the company directly.
The 3PFC280-24BR, weighing 21 pounds, is priced at $1,749 each.
Absopulse Electronics, 1-613-836-3511, www.absopulse.com