FUNCTION INTRODUCTION ¡ñCan visual measure value of turn ratio and joint groups ¡ñTest speed is fast, complete all three-phase test in 10 seconds ¡ñTest of the Z shape join transformer ¡ñCVT transformation ratio measurement ¡ñpermanent clock& date display function, data storage function, high and low voltage transformer protection function, protection function of transformer short circuit and turn to turn short circuit ¡ñThe function of current display can judge the short circuit among circle ¡ñVoltage export160V£¬10V£¬two grades can test product whose rated voltage is low and no load current is strong