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Error in book?

Discussion in 'General Electronics Discussion' started by icor1031, Oct 4, 2013.

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  1. icor1031


    Apr 27, 2010
    From "Practical Electronics for Inventors"

    Shouldn't it be 0v and not 240v, because A and B are out of phase?


  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Ah, but voltage is a difference between what you see at two points, so if you plot A - B you will get what they label as AB.

    since B = -A, A - B = A - (-A) = A + A = 2 * A

    Note that this relationship is not as simple in cases where there is three phase power.
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