Three Phase Generator

Discussion in 'General Electronics Chat' started by LEVA, May 29, 2005.

  1. LEVA

    Thread Starter New Member

    May 29, 2005
    Thinking of purchasing a reconditioned gasoline- motor driven Three Phase Generator.
    The voltage output is 110/208Vac. Our intent is to use the Generator as emergency
    backup power for our home which is single phase 110-240Vac.
    We have been told that by using only two legs of the available power that we will
    reduce the total available output current by (Two thirds).
    There are Three legs of power with a Return - We can measure 110Vac
    between each leg and ground - Can you tell me if this statement is true ??
    Thanks, Leon
  2. beenthere

    Retired Moderator

    Apr 20, 2004

    Yes, you will be able to use the generator if you are careful. The windings do give you 115 VAc each, and will work fine for any 115 VAC load up to the rating of the generator's output.

    Each voltage peak is only displaced 120 deg. though, so the output will not be suitable for any 220 VAC load you might have. The difference between phases will be less than 200 VAC, and your 220 volt loads will burn up through excessive current draw. That might mean lights and refridgerator, but no air conditioner or oven.
  3. LEVA

    Thread Starter New Member

    May 29, 2005
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    If it were me, I would hold onto my money and look for a more appropriate generator.

    If the impedence of the appliance is unchanged, then wouldn't a drop in applied voltage result in decreased current?