Connect two transformers in series

Discussion in 'General Electronics Chat' started by jake77, Mar 2, 2010.

  1. jake77

    Thread Starter New Member

    Feb 26, 2010
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    0
    I have two transformers having 24 V and 28 V RMS output's

    I need output voltage greater than 50V RMS so is it possible to connect these two transformers in series?
     
  2. rjenkins

    AAC Fanatic!

    Nov 6, 2005
    1,015
    69
    As long as the current rating is similar, or you draw no more current than the lower rated transformer is rated for.
     
  3. jake77

    Thread Starter New Member

    Feb 26, 2010
    7
    0
    Should i connect the primary coils in series as well?
     
  4. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    If the nominal transformer primary voltages are the same as the mains supply voltage then the primaries should be connected in parallel. The connection polarities (either primary or secondary) need to be arranged such that the secondary voltages add rather than subtract. By measuring the total secondary voltage you'll soon discover whether the connection polarities are correct or not.
     
  5. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
    230
    Connect the primaries in parallel...but...the phasing of the primaries must be the same. Connected one way, the series secondaries will add and you get 52Vrms out. Reverse the primary connections and the secondaries subtract, giving you 4Vrms out.

    Ken
     
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