Three phase variac transformer SG series autotransformer H grade enameled wire

Three phase transformer SG/QZB/SBK/Power transformer/ZSG/SBDG/EPS UPS Input Voltage Customized Output Voltage Customized Impedance Customized Connection Type DYN11/YYN0 Capacity 0.1KVA—2500KVA Frequency 50/60Hz Insulation level F/H Pressure Test Primary to secondary2.5KV/min; Primary to safety ground2.5KV/min; Secondary to safety ground1.5KV/min Insulation Resistance Primary to secondary2500V>100megohm; Primary to safety ground2500V>100megohm; Secondary to safety ground1500V>100megohm Induced overvoltage withstand test 125Hz/760V/min Ground Resistance 25A<100milliohm Cooling Method Natural or air cooling Transformation Ratio <3% Air Carrying Current <3% Impedance Voltage about 4.5% Total Losses 4% Efficiency 80%--99% Certificate CE,ISO