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500W-1kW offtheshelf offlien SMPS's with no fan (240VAC)

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treez

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Hi
We would like to see examples of offtheshelf SMPS's of 500W up to 1kW that have no fan cooling, to look at the sizings.
By "no fan", we mean no fan inbuilt into them, and no fan meant to be mounted externally of them.
Also they must not be water cooled.

Do you know of any?
We cant find any on the web
 

24 VDC power supplies are common in industrial equipment. To my experience, they are typically without cooling fan. Here are several examples. I didn't check the details, if they are all without cooling fan. 20 A makes about 500 W and 40 A about 1000W.

https://uk.rs-online.com/web/p/din-rail-panel-mount-power-supplies/7080435/
https://www.pulspower.com/products/product-landingpages/24v-20a-din-rail-power-supplies/
https://www.simplypowersupply.com/DIN-Rail-Power-Supply/DRP-480S-24-Meanwell-24Vdc-20A-DIN-Rail-Power-Supply.aspx
https://www.automation24.com/din-rail-power-supply-weidmueller-promax-960w-24v-40a-1478150000
 
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Thanks, they have all got open grills in the top of the enclosure. It would be interesting to see how totally enclosed power supplies compare...eg ones with IP66 rating.
 

IP66, 67 is more of a challenge than people think - some have internal fans for even heat distribution - others have a thermal path to the case for all the bits that get warm - chokes, Tx's, resonant caps, fet's ... input bridges, EMI toroids ...
 
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