Free-air convection cooled open frame power supplies are certified ‘safe power’

150 and 300W free-air convection cooled power supplies have been added to the range available from Cosel. The LHP150F and the LHP300F are designed for industrial applications which require high levels of safety; both are certified according to EN62477-1 (OVC III).

The LHP150F and the LHP300F work over a wide universal input voltage range of 85 to 264V AC and have a high typical efficiency rating of 93 per cent. The power supplies are available in five different output voltages commonly used in industrial automation and processes, with 200 per cent peak power capability for up to 10 seconds for dynamic loads. The standard product is an open frame PCB type, with a chassis and a cover is available as an option.

Both power supplies 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. This simplifies the system designer’s task, reducing cost and guaranteeing the highest level of efficiency.

Suitable for use around the world, the LHP150F and LHP300F have an input voltage of 85 to 264V AC and five output voltages: 24, 30, 36, 42 and 48V with respective output current of 6.3, 5.0, 4.2, 3.6 and 3.2A for the LHP150F and 12.5, 10.0, 8.4, 7.2 and 6.3A for the LHP300F. The output voltage can be adjusted using a built-in potentiometer.

Industrial applications often require higher current during start-up or during peak operation. The LHP150F and LHP300F are designed with a high dynamic control level and a power stage able to sustain long peak loads making it possible to deliver 200 per cent for up to 10 seconds of the nominal power when a peak load situation occurs. For example, the LHP150F 24V output version delivers a permanent current of 6.3A with up to 12.6A peak. The same ratio applies to all versions of the LHP150F and LHP300F.

For low harmonic current distortion, there is an active power factor corrector (PFC) and the switching stage which uses an LLC resonant topology for a typical efficiency of up to 94 per cent.

Optimised for convection cooling, the power supplies can be operated within an ambient temperature range of -10 to +70 degrees C.

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

Both the LHP150F and LHP300F have an input to output isolation of 3,000V AC, input to ground (FG) of 2,000V AC and output to ground (FG) of 500V AC. They include built-in inrush, over-current and over-voltage protection circuits.

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

Options available include coating, low leakage current, EP connector type (J4), remote on/off, chassis, chassis and cover, terminal block type, connector to an external capacitor bank, output eight-pin connector (LHP300 only), push-in terminal block and built-in DC fuse.

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

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