Single-Phase TURA series devices can test transformer turn ratio and calculate error as a percentage. By testing the turn ratio operator can understand how much voltage they will get from the secondary side precisely. TURA single-phase series turn ratio meters can test three-phase transformers also.

TURA-01:100V TURNS RATIO TESTER WITH BUILT-IN BATTERY AND PRINTER
HightestTURA-01 is designed to accurately measure the turns ratio of single-phase and three-phase transformers. TURA-01 performs fast and accurate turns ratio measurements on current, voltage and power transformers using its user-friendly interface. With market-leading accuracy, the TURA-01 has a very wide ratio measurement capability with an accuracy of 0.08 %.