LIST About the standards For TTR771F, why and when 6/8 terminals are used What is turn ratio of a transformer? What is voltage ratio of a transformer? Why do we want to measure a transformer TTR? How do we test a transformer voltage ratio? TTR accuracy measure deviation and IEC required What is good transformer TTR? Why do we recommend TTR771F? Can we use TTR to measure CT, PT and CVT? Difference VFD and Variable Frequency Power Supply