Work related

Discussion in 'General Electronics Chat' started by smitty13, Jul 22, 2008.

  1. smitty13

    Thread Starter New Member

    Jul 22, 2008
    The Plant I work use's a three phase delta transformer to run there equipment I'm having trouble explaining why, on (A) phase the voltage is lower than (B) & (C) phases. Please help explain?
  2. SgtWookie


    Jul 17, 2007
    How much lower?

    Actually, what are you measuring on each phase, and how are you measuring it?

    Phase to phase, or phase to a neutral somewhere?

    If your secondary winding is indeed a delta, you'll only be able to measure phase to phase. If it's a wye-wound, you'll have three phases and a neutral.
  3. theamber

    AAC Fanatic!

    Jun 13, 2008
    Because you are measuring A to the neutral which is center tapped.
    For example in a 120/240 four wire Delta High leg.
    A to Neutral is 120 but if you measure A to B, B to C or A to C you will get 240 in all.
    You should buy Ugly's Electrical References booklet.
    Last edited: Jul 23, 2008