1. After entering the effective value of voltage and current, press the "OK" key or move the mouse to another location, the written data will automatically retain three effective digits after the decimal point. When setting the phase, you can enter- Any angle within the range of 180-360, if the written angle exceeds the above range, the system will automatically convert it to this range;

 

        2. The maximum output of AC voltage single-phase is 120V. When higher voltage is needed, any two voltages can be used in series. Their amplitudes can be different, but the phases are opposite;

 

        3. The "upper limit" column is to set the effective value of the maximum allowable output of each phase. If you are worried that a certain phase will accidentally output too large and damage the relay during the test, you can set the phase-"upper limit", then the test The phase will never exceed the limit during the process, which can ensure the safety of the relay;

 

        4. In the lower left corner of the interface, the current state of the line voltage and the zero sequence, positive sequence and negative sequence components of voltage and current are displayed. When doing low voltage blocking over current, if the protection set value is given to the line voltage, then the protection During the operation, not only the voltage value of the protection operation can be seen intuitively from the above, but also the value of the line voltage can be read out, without the need for the tester to calculate by himself.