Discussion in 'Homework Help' started by matt11111, May 25, 2009.

  1. matt11111

    Thread Starter Member

    May 12, 2009
    I have a transformer that is 3 phase and rated at:

    H.V=600v, L.V= 208/120

    I assumed because of the two different output voltages (208 and 120) that the transformer was a 3 winding model with two secondary coils. Is a 3 winding transformer the only way to achieve two different output voltages or can this be done by other methods such as tapping the secondary coil?
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    The LV values are probably dependent on the way the primary or secondary windings are connected - either in star or delta configuration. To allow you to connect in either configuration you would need each secondary winding terminal to be available (3x2=6 wires).

    Notice that 208/120 = 1.732 = sqrt(3)