Product Description The multifunctional TAU3 simplifies transformer testing with a single connection for all tests, reducing dependence on multiple devices and minimizing testing time, helping you maximize productivity for quick and accurate maintenance decisions. In addition to standard polarity, turns ratio, winding resistance, and degaussing tests, TAU3 offers impedance and short-circuit efficiency testing with the same single wiring connection. With color-coded wires and terminal clamps with vectors matching the transformer's nameplate, simple setup ensures correct results on the first attempt… just press 'Start' and let the patented internal short-circuit compensation and output perform their work!