Switching supplys

Discussion in 'The Projects Forum' started by fishguy60, May 26, 2013.

  1. fishguy60

    Thread Starter New Member

    May 26, 2013
    I have 3, 5 volt 200 amp switching supply's they all work, however when I try to wire them in series to make them into a 15 volt power supply 1 drops out. 2 will regulate with each other, any 2 but when I add in the 3rd one one will drop out, Any suggestions on how to over come this problem ?
  2. LDC3

    Active Member

    Apr 27, 2013
    Sounds like a disaster waiting to happen.

    Read this web page and also others when you search for "connecting power supplies in series"
  3. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    You need to get a 15Volt psu on its own, its not good practice to use several psu's together, the reason is that they are not isolated from ground so they short out.