how to do transformer ratio
Symbol of a transformer. The turns ratio of a transformer is the ratio of number of windings of each side of the transformer. Sometimes you wish to find out the turns ratio of an unlabeled transform.The transformer turns ration is labeled as follows: 1  n 1 :n 2.easuring Voltage to find ratio Edit. Symbol of a transformer. A transformer converts one AC Voltage to another. So inputing an AC Voltage and measuring the output Voltage will give you the turns ratio.