Conduction cooled 1200W AC-DC power supply for harsh environments

Conduction cooled 1200W AC-DC power supply for harsh environments

New Products |
By Nick Flaherty

Powerbox has launched a ruggedized 1200W AC-DC power supply for harsh industrial environments and ground based defence applications.

The OFD1200A AC-DC power supply series has a metal chassis with a baseplate for conduction cooling and can be used with a baseplate operating temperature range of -40 up to +95 degrees C. For extremely demanding applications the OFD1200A features a conformal coating and is mechanically ruggedized according to the MIL-STD810H standard.

The AC-DC power supply is ruggedized to withstand harsh transients and meet demanding EMC performance levels as required with most common defence and the more demanding industrial applications, according to the MIL-STD- 461 CE-102 and also meeting the MIL-STD-1399-300.

The power supply measures 142 x 40 x 340mm (5.59 x 1.57 x 13.38 inches) and weighs 1.8kg and  operates with a wide universal input range from 85 to 305VAC with power factor correction (PFC) and the output voltage and current can be adjusted from near zero to the maximum allowed for each model.

The AC-DC power supply is designed for high availability, short time-to-market and to meet commercial and military off-the-shelf (COTS/MOTS) business models with four output voltages of 12V, 28V, 48V and 65V and nine units can be connected in parallel for an output of 9.720kW.

A number of defence applications require power supplies to operate with limited or no ventilation cooling, installed in a sealed box, radio communication systems subject to adverse weather conditions, outdoor surveillance and access control or indoor equipment with very strict audible noise restrictions. In addition to environmental requirements, reliability and cost of maintenance are motivating systems designers not to use fans and blowers, requiring conduction cooling.

Depending on the assembly method and the overall cooling conditions, a derating may apply as specified in the technical documentation, and the typical efficiency for the 48V output unit at 230VAC input is 92%.

The OFD1200A has passed shock and vibration testing as specified in MIL-STD-810H. In that respect the products have been tested to levels far above normal operating conditions and are designed to sustain high, 20G level shocks.

The OFD1200A is available in four versions of single output DC voltage, 12V/84A ; 28V/43A ; 48V/25A and 65V/18.5A.


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