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Help with understanding Polarity Selector switch

Discussion in 'General Electronics Discussion' started by desertguy, May 19, 2012.

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  1. desertguy

    desertguy

    4
    0
    May 19, 2012
    Hi guys, I have a quick question; I have a European appliance that is a 220 and I need to run it in the US.....I bought an AC/DC adapter thru Amazon.com and was getting ready to hook it up to the unit but I see it has what's called a reverse polarity switch on it that you turn with a little key; It's called a Polarity selector and one side turns to the left which is a + and the other side on the right is a - (minus sign) What is this Polarity switch and do I turn it to the plus or minus to safely run the European appliance here in the States? thanks!
     
  2. davenn

    davenn Moderator

    13,619
    1,882
    Sep 5, 2009
    hi desertguy
    welcome

    the AC side shouldnt have a polarity selector since there is no fixed polarity

    I can only assume, without more info, that it selects the polarity of the DC output
    so that the centre pin of the DC plug can be switched to either + or -

    but back up a bit....

    you start by saying you have an appliance that works of 220VAC but then you are talking about an AC/DC adaptor ??

    you dont use an AC/DC adaptor on an AC appliance

    Dave
     
  3. desertguy

    desertguy

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    0
    May 19, 2012
    Thanks buddy!
     
  4. Rleo6965

    Rleo6965

    585
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    Jan 22, 2012
    You need AC Step UpTransformer that will conver 110V AC into 220V AC for your aplliance. Be sure to buy correct Wattage.
     
  5. desertguy

    desertguy

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    0
    May 19, 2012
    Thanks Much!
     
  6. Wabajig

    Wabajig

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    Apr 14, 2012
    We have 220vac in the states in circuit breaker box, is it the frequency 50hz or 60hz that is the problem?
     
  7. Rleo6965

    Rleo6965

    585
    9
    Jan 22, 2012
    If your Appliance have no AC motor. I think it would not be a problem.
     
  8. desertguy

    desertguy

    4
    0
    May 19, 2012
    I appreciate your help guys. It turns out that it works fine when switched to either the plus or the minus.
     
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