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Safe A3S Power Supply Replacement
jollypike
Posts: 12Member
I know that people recommend an inexpensive LED power supply to replace the woefully underpowered power supply shipped with the A3S, but, as an electrical engineer, I can say there are some problems with this that worry me. The first problem is that the power supplies are unsafe unless mounted in another enclosure as the LV terminals are exposed to touch (hence don’t comply with BS7671 wiring regulations for Low Voltage supplies if used without an enclosure - then cooling issues come into the equation). The second is that some of these supplies are so cheap you worry about the quality.
i’ve been doing some research and found for example the Power Pax or Mean Well IP rated ranges of 600w (up to 25 Amp) power supplies which do comply (e.g. Mean Well HLG-600H-24) . There are different versions (some models have tuneable voltage and current pots for example for C.V. and C.C. operation). They’re also IP rated! But they’re not cheap.
Hope this helps someone.
i’ve been doing some research and found for example the Power Pax or Mean Well IP rated ranges of 600w (up to 25 Amp) power supplies which do comply (e.g. Mean Well HLG-600H-24) . There are different versions (some models have tuneable voltage and current pots for example for C.V. and C.C. operation). They’re also IP rated! But they’re not cheap.
Hope this helps someone.
Post edited by jollypike on
Comments
indeed I read an article about their use with LED’s which was indicating that even placing these out of reach (say in a loft) wasn’t acceptable as an untrained person could access the loft and come to harm. Only an enclosure was acceptable (and obviously that enclosure must be cooled or act as a heatsink).
As an electrical engineer I’ve had this safety discussion a few times with designers LOL.
Its the same with computer ATX PSU’s. Always buy higher power than you need so you don’t stress it, and buy quality!
If you find a good price somewhere, let me know, and we can add it to the wiki!
Personally I think I’d use a bench PSU as they can be used for all sorts of projects LOL,
Or buy some of these super cheap iP rated power supplies (min order 5). You’ll need a few when they blow up and have a spare for a couple of friends LOL.
https://www.alibaba.com/product-detail/Factory-outlet-600w-25A-50A-constant_60511544440.html?spm=a2700.7724838.2017115.270.22137ae8X28UG0
That high power LED power supply you’ve posted looks like it should work fine. But it would be nicer, if we could find a brand-name product that would give greater confidence in its reliability...👍 However if you can find one that is IP 67 rated, you could submerge it in a bucket of water, that way it could never catch fire! 😂😂😂
i think Mean Well is still the best choice because it will be safe and guaranteed.
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