VTSYIQI Transformer Turns Ratio Meter Digital TTR Tester with Variable Ratio Range 0.9-10000 5-inch Touch Screen Overload Protection 500 Groups Data Storage for Single-Phase Transformer Three-Phase Transformer Z-Type Transformer PT CT

VTSYIQI Transformer Turns Ratio Testers Single-Phase Three-Phase Transformer Tester with Variable Ratio Range 0.9-10000 5-inch Touchscreen for Single-Phase Three-Phase Z-Type Transformer PT CT