i repeat again
then the only method to obtain two hot wires - in phase - at home as at USA- which is the secondary of a transformer - is to make the primary also in phase which means we have two methods to make the primary in phase :
1- the generator station must be star connection , and take one hot wire and the nuteral and applied it to the primary and then obtain at the secondary two hot wires in phase
2- the generator station may be delta connection , but put after that transformer 1 : 1 which its primary is three phase delta connection and the secondary is three phase star connection with ratio 1 : 1 , and for the secondry of this transformer i take one hot wire and the nuteral and applied it to the primary of another transformer and then obtain at the secondary of this another transformer two hot wires in phase
3- i.e : i think if the primary of the transformer is single phase , the secondary must be also single phase , and if the primary of the transformer is three phases ( 3 single phase transformers in one box ) , the secondary must be also three phases ( 3 single phase transformers in one box ) ,
as it is wrong to say the primary of the transformer is three phases delta connection and obtain at the secondary two hot wires as a single phase , i think it is impossible !!!
do these above notes are right or not ??
if the above notes are right , what is the meaning of the figure c as shown below as i think it is wrong wiring !!!! am i correct or not ?? or what is the explansion ??
wait for your answer
thanks all