Main Features:

　　1)Voltage ratio measurement of singe phase or three-phase transformer

　　2)Turns ratio measurement of singe phase or three-phase transformer

　　3)Group vector measurement of singe phase or three-phase transformer

　　4)Able to calculate the ratio error automatically

　　5)Able to switch phase sequence and measuring range automatically

　　6)Cut off the test voltage automatically after the test finished

　　7)Save the test results into the tester

　　8)Uploading the test results via RS232 port

　　9)Print the test results via built-in printer

　　10)Identify the reverse connection automatically and prompt

　　11)Built-in protection circuit to prevent the incorrect connection