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    zuk's Avatar
    zuk Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 7, 2010, 11:35 PM
    How to convert 270 Ac volts in to 5 Dc volts
    How to convert 270 Ac volts in to 5 Dc volts
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Jan 8, 2010, 03:45 AM
    Try using a DC power supply of the VA size equal or greater than than load to be served.
    lukeshari's Avatar
    lukeshari Posts: 2, Reputation: 1
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    #3

    Aug 20, 2012, 06:36 AM
    We have a 277 volts coming out and we need to install an electronic sign that only uses 115 volts.

    Can this be converted to 115 volts
    lukeshari's Avatar
    lukeshari Posts: 2, Reputation: 1
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    #4

    Aug 20, 2012, 06:39 AM
    Quote Originally Posted by tkrussell View Post
    Try using a DC power supply of the VA size equal or greater than than load to be served.
    Could you please explain this is layman terms

    This current is coming from parking lot lights. We are trying to avoid trenching under the road
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
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    #5

    Aug 20, 2012, 09:53 AM
    you could tap the circuit that supplies the poles...
    mount a small transformer on the pole or preferably at the sign.
    What is power requirement of the sign? 115 volts AC and how many amps?
    Volts x Amps = the VA requirement of the transformer.
    sounds like you could use to hire an electrician?
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
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    #6

    Aug 20, 2012, 09:54 AM
    By the way, if the pole lights are controlled by an integral photocell the sign will be on all the time...
    If they are controlled by a contactor the sign will only be on when the lights are on...
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