General AVR Current & voltage protection relay is designed to protect devices with sensitive operating voltage & current values from errors that may arise from mains voltage and Overload. Device Usage and Principle of Operation Make the connections of the device according to the connection type. Otherwise, the device may be damaged. Adjust the over-current and high & low voltage and settings of the device according to the operating current and voltage values of the load you will use. Over-current Error state: If the current value is under the current set values (when the device is not in error), the current value rises above the current set value, the device waits for the set error waiting time, then the device de-energizes the relay, the error led turns on, the overload value displayed on the current display flashes throughout the error period. Voltage Error state: If the mains (input) voltage value is between the high and Low voltage set values (when the device is not in error), the mains (input) voltage value rises above the high voltage set value or under below the low voltage set value; the device waits for the set error waiting time, then the device de-energizes the relay, the error led turns on, the mains input voltage value displayed on the voltage display flashes throughout the error period. Exit the Over-current Error state: After eliminating the load over-current fault, Press twice the on/off key to manual reset or cut off the power supply. Note_1: Manual reset is to avoid secondary damage to the system by automatically resetting the system without excluding over-current or short circuit. Exit voltage error state: When the mains (input) voltage value returns to normal / when the reaches a value between the high and Low voltage set values the device waits for the set reset waiting time, then the device energizes the relay. the error led turns off, the out led turns on.