With the latest DV-Power turns ratio testing technologies, you can now perform power transformer turns ratio test using the graphical touch screen where you can clearly see configuration and measurements of three phase windings between primary and secondary side.
Seaward PV200 Solar I-V Curve Tracing Photovoltaic Installation Test Kit with PV200 Installation Tester, 200R Irradiance Meter, DC Clamp and SolarCert Solftware.