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sonkhughosh
Joined: 29 Jul 2009
Posts: 8
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 Posted: Sun Jul 25, 2010 11:15 pm Post subject: Will ATX SMPS work in US at 110V |
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I have around 15 computer SMPS - those grey metal box ones - looks the same since they started coming into market for Pentium III boxes in 2000.
I think they cost around Rs 400 on the average when purchased new and are very useful in powering robots ( esp. heavy duty motors )
My question is - they run fine, here, on 230V, but would they run, without modification on 110-117V ( if I take part in US/International competition ? )
They are not active PFC type - they are those simple cheap stuff, also often found refurbished at second hand electronics shops. |
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mvs sarma
Joined: 11 Oct 2006
Posts: 448
Location: Hyderabad, India
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| Posted: Mon Jul 26, 2010 1:18 am Post subject: Re: Will ATX SMPS work in US at 110V |
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| sonkhughosh wrote: | I have around 15 computer SMPS - those grey metal box ones - looks the same since they started coming into market for Pentium III boxes in 2000.
I think they cost around Rs 400 on the average when purchased new and are very useful in powering robots ( esp. heavy duty motors )
My question is - they run fine, here, on 230V, but would they run, without modification on 110-117V ( if I take part in US/International competition ? )
They are not active PFC type - they are those simple cheap stuff, also often found refurbished at second hand electronics shops. |
The power supplies might have a slider switch or jumper facility on board for changing to 110V operation.
Also most power supplies , if supplied in India didn't have the front end RFI filter.
thus they , after mod maight work at 110V in India but may not fit into US standards.
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sonkhughosh
Joined: 29 Jul 2009
Posts: 8
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| Posted: Mon Jul 26, 2010 8:27 am Post subject: Re: Will ATX SMPS work in US at 110V |
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| mvs sarma wrote: |
The power supplies might have a slider switch or jumper facility on board for changing to 110V operation.
Also most power supplies , if supplied in India didn't have the front end RFI filter.
thus they , after mod maight work at 110V in India but may not fit into US standards. |
Slider switch all of my SMPS have but when I open cabinet, I see no connection to board 
Switch is dummy switch!
What nod will you suggest?
Also - how can I get 110V from 230V in India so I can test my SMPS? |
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mvs sarma
Joined: 11 Oct 2006
Posts: 448
Location: Hyderabad, India
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| Posted: Mon Jul 26, 2010 12:27 pm Post subject: |
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as you cant anyway export them to US, why all this?
there are 230 to 110 heavy duty transformers sold by "DELA" company
they charge heavily like Rs1000/-
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sonkhughosh
Joined: 29 Jul 2009
Posts: 8
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| Posted: Mon Jul 26, 2010 11:53 pm Post subject: |
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| mvs sarma wrote: | | as you cant anyway export them to US, why all this? |
Why not? 
I am planning to carry them by ship with the rest of my books and stuff - that is why I want to be sure.
I checked, and saw that the "ATX" PSU there are very costly, and I anyways have a lot of SMPS. |
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