1. Press and hold the setting button for 2 seconds to enter the setting state, and display the overvoltage setting value UH270, the setting range is 200-300, and the default protection value of overvoltage is AC270V;
2. Press the up button or down button to change the protection value required for overvoltage;
3. Press the setting button to enter the next menu, the undervoltage setting value is UL170, and the setting range is 140-200; Undervoltage default protection value AC170V;
4. Press the up button or down button to change the protection value required for the undervoltage;
5. Press the setting button to enter the next menu, the setting value of undervoltage protection is Ut1, the setting range is 1-120 seconds, and the default value is 1 second;
6. Press the up button or down button to change the protection value required for overvoltage;
7. Press the setting button to enter the next menu, the rated current protection setting value is In63, the setting range is 1-80A, and the default value is 40A or 63A;
9. Press the up button or down button to change the protection value required for overcurrent;
10. Press the setting button to enter the next menu, set the time of overcurrent protection Int20, set the range from 1 to 120 seconds, and the default value is 20 seconds;
11. Press the up button or down button to change the protection time required for overcurrent;
12. Press the setting button to enter the next menu, and the automatic reset time Adt20 after failure, the setting range is 1-120 seconds, and the default value is 20 seconds;
13. Press the up button or down button to change the auto-reset time;
14. After the setting is completed, press the reset button to save and return to the actual current and voltage display