TTRU3 True three-phase transformer turns ratio tester

Megger's TTRU3 guarantees a transformer turns ratio accuracy of ±0.05 %
The TTRU3 instrument provides a three-phase test source that can perform step-up (preferred) and step-down TTR tests and will become your new pinnacle standard of measurement.
Performs three-phase step-up ratio tests (patented)
Performs three-phase tests in less than 10 seconds
Smallest and lightest three-phase test set on the market
Test voltage up to 250 V
Automates an OLTC test sequence with one touch