Hi all,
I have a circuit needing both a 12vac and a 24vac supply. I have 12v and 24v transformers. So, fit one of each and connect the two '0v' terminals is the plan. There's no markings on the trannies......so how do I determine which terminal is which please to keep them in phase? Thanks.

 

Connect one terminal of each transformer secondary together then measure the voltage between the remaining two secondary terminals. If you measure about 12V AC then the connection is correct. If the reading is around 36V AC then swap the link between the transformers on one of them to the other terminal.

 

Connect one terminal of each transformer secondary together then measure the voltage between the remaining two secondary terminals. If you measure about 12V AC then the connection is correct. If the reading is around 36V AC then swap the link between the transformers on one of them to the other terminal.

Ok Albert, thanks for that, I'll give it a try later and post again. Dave.