The transformer should have a plate with primary and secondary voltages.
Measure between each of the two phases available and hook up the transformer accordingly,
If you measure 415v, then connect between 0v and 415v.
Max.

 

Hi guys

Apologies I understand it now. What was throwing me was the voltages on the primary side I couldn't understand why the connection from the overload was going on to the 415v primary side when I was measuring it at 230vac between phase and ground. The fact that one phase was looped around to another had me confused. I put one phase onto the 415 on the primary from the overload and the other phase from the overload onto 0 on the primary and it is working as it should.

Thank you for the help guys and apologies for the frustration and confusion I caused