Connect two transformers in series

Thread Starter

jake77

Joined Feb 26, 2010
7
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?
 

t_n_k

Joined Mar 6, 2009
5,455
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.
 

KMoffett

Joined Dec 19, 2007
2,918
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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