Free-air convection cooled open-frame power supplies

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COSEL has announced the addition of 150W and 300W free air convection cooled power supplies, the LHP150F and the LHP300F.

Designed for industrial applications requiring high levels of safety, both devices are certified according to EN62477-1 (OVC III). They work over a wide universal input voltage range of 85 to 264VAC and have a high typical efficiency rating of 93%.

Both the LHP150F and LHP300F are available in five different output voltages commonly used in industrial automation and processes, with 200% peak power capability for up to 10 seconds for dynamic loads. The output voltages available are: 24V, 30V, 36V, 42V and 48V with respective output current of 6.3A, 5.0A, 4.2A, 3.6A and 3.2A for the LHP150F and 12.5A, 10.0A, 8.4A, 7.2A and 6.3A for the LHP300F. The output voltage can be adjusted using a built-in potentiometer.

The LHP150F and LHP300F are certified to the EN62477-1 Over Voltage Category Three (OVC III), meaning that a final equipment powered by the products can be connected directly to the main distribution panel without adding an extra level of isolation.

For low harmonic current distortion, the LHP150F and LHP300F use an active Power Factor Corrector (PFC), and the switching stage uses an LLC resonant topology combined with the latest generation of power semiconductors, conferring a typical efficiency of up to 94%.

Optimised for convection cooling, the power supplies can be operated within an ambient temperature range of -10 to +70C. Depending on the assembly method and ventilation across the final equipment, a derating may apply as specified in the technical documentation.

Open frame type, the LHP150F measures 75 x 27 x 160mm (2.95 x 1.07 x 6.30 inches and weighs 320g max, while the LHP300F measures 84 x 37 x 180mm (3.31 x 1.46 x 7.09 inches) and weighs 580g max.

The LHP150F and LHP300F have an input to output isolation of 3,000VAC, input to ground (FG) of 2,000VAC and output to ground (FG) of 500VAC. They include built-in inrush, overcurrent and overvoltage protection circuits.

Both power supplies comply with safety requirements UL (USA), C-UL (Canada), DEMKO (Denmark), and TUV (Germany) and are UL62368-1, C-UL (equivalent to CAN/CSA-C22.2 No.62368-1), EN62368-1, EN62477-1 (OVC III) certified. The LHP150F and LHP300F also comply with DEN-AN.

A number of application specific options are available including Coating (C), Low leakage current (G), EP connector type (J4), Remote ON/OFF (R), Chassis (S), Chassis & Cover (SN), Terminal block type (T), Connector to an external capacitor bank (U1), Output 8 pin connector (LHP300 only) (J5), Push-in terminal block (T4), and Built-in DC fuse (DC).

The LHP150F and LHP300F series have a five-year warranty and conform to the European RoHS, REACH and Low Voltage Directives.