Astec Introduces the HPS Series Bulk Front-End Switching Power Supply
Astec (Carlsbad, CA) has introduced the modular HPS Series bulk front-end switching power supply. Initial models of these customizable systems are available in 5.25" (3U) rack configurations that can house up to four individual modules with a choice of single dc outputs from 24Vdc to 60Vdc, and power ratings of 1,000W and 1,250W for a maximum total rating of 5,000W.
Modular building blocks are at the heart of the new system. Each 1,000W and 1,250W module features universal 85Vac to 264Vac input, and accommodates frequencies from 47Hz to 440Hz with 0.99 power factor. For expanded flexibility, Astec plans to release additional modules with power ratings from 500W to 2,000W in the future.
With extensive built-in intelligence, the HPS rack itself includes a smart-power interface in the form of a slot at the side of each rack. The slot will accommodate standard cards that can include RS232 communications, current limit, fan controls and any number of other features that are possible with the unique microprocessor interface. The microprocessor can enable communication features that allow digital-temperature monitoring and storage of unique serial numbers or other product identification or status data. The system ensures maximum reliability with N+1 redundancy and hot-plug capability for the individual modules.
Other features include high efficiency (up to 85 percent), over-voltage protection, full-cycle ride-through and 30ms of holdover storage with more than 5ms early warning before outputs lose regulation. Each module also includes a 5Vat 5A standby supply along with an optional 60W auxiliary 12V or 24V output for driving fan trays.
Available with a choice of either droop- or forced-current share, the HPS Series also offers a selection of other options, including an integrated ORing diode, current monitor and ac-line discrimination. Evaluation units in 3U configurations will be available in July 2000, with production units slated for September delivery. Because of the wide range of options, pricing varies starting at about $376 per module, and $205 for the rack.
