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Author Topic: Power Supply Question  (Read 1739 times)

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Power Supply Question
« on: February 10, 2011, 12:15:14 PM »
Hi All,
   I gutted a piece of equipment from a financial institution and pulled this PS.
I've never seen one quite like this one.
110VAC in, says 28V out of the blue cap. (40,000uF, 40 VDC, Max surge - 50 VDC)
The gray cap says 3uF 660v. What is its purpose ?

How can I determine the MAX wattage of this unit ?
« Last Edit: February 10, 2011, 01:47:23 PM by Overloaded »
Re: Power Supply Question
« Reply #1 on: February 10, 2011, 12:30:57 PM »
You will need to know the current it can deliver.

You cannot calculate the wattage only knowing the output voltage.

There's an AC capacitor and a DC capacitor for filtering DC output currant.

The output currant is more stable with the output capacitor, will prevent small ripples of voltage.

Re: Power Supply Question
« Reply #2 on: February 10, 2011, 01:56:18 PM »
Hi Jeff,
   Thanks for the info.
No way ? I was hoping there was a way to determine the current available.
The voltage is probably too low for any practical CNC app anyway, I suppose.
To the dump !
Thanks again,