Dual Display 40A 63A 80A 230V Din Rail Adjustable digital Over Under Voltage Relay Surge Protector

1.Change the setting value by pressingkeys. 2.When the setting over-voltage protection value exceeds 300V, the over-voltage protection function will be closed. 3.When the setting under-voltage protection value is lower than 14ov, the under.voltage protection function will be closed. 4.Press thekey for more than 12 seconds to query the last fault, and press thekey for more than 6 seconds to restore the factory settings. 5.During the setting process, it is not necessary to press the last step,but longpress the seT key to save.