LONG RUN CABLE in AC or DC?

1 Posts

Feb 5, 2008 01:44 am

LONG RUN CABLE in AC or DC?

My 1000w wind turbine produces 3 phase AC and is 500 ft from the house. Should I run the AC current to the house and then convert to DC or site the 24v controller close to the tower and run 24v DC to the battery bank and inverter by the house? I keep getting different answers.

163 Posts

Feb 5, 2008 10:54 am

Re: LONG RUN CABLE in AC or DC?

Do the longest run with the highest voltage that you have available. You are effectively transferring power (V x I), but the current (I) portion determines the size, or ampacity, of the cable that you will have to use and that will probably be your greatest cost. The lower the current being transferred the smaller, and hence cheaper, cable you can deploy. This is why power utilities transfer power from their main generation plants to the sub-stations with voltages in the kilovolt range. The low current minimizes the loss of power in the cables.

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