40A/63A Adjustable Digital Voltage Relay 220V Household Circuit Breaker Surge Protector Limit Over And Under Current Protection
1 protection
2 defense
three protection
four recovery
5 display(voltage measurement)
6 demonstrate (current measurement)
7 Voltage calibration: Voltage +-10% adjustable A13
8 Current calibration: Current +- 9/5% adjustable A15
9 Restore manufacturing unit settings: press the down button for more than 12s
10 inquiry: Press the UP button from more than 12S