1、The product board is made of premium electronic components with dependable performance. 2、When the power returns to normal, the equipment will be re-energized within 1 minute. 3、The green indicator light indicates that the power supply is working properly. The red indicator light indicates overvoltage or undervoltage. 4、The automatic recovery overvoltage and undervoltage protection device conforms to the modular design standard. 5、When the power supply is unstable, its protection function will be activated automatically. Once the voltage exceeds a limited range of products, it will automatically cut off to protect the safety of electrical equipment and personnel. Features: The product board is made of premium electronic components with dependable performance. When the power returns to normal, the equipment will be re-energized within 1 minute. The green indicator light indicates that the power supply is working properly. The red indicator light indicates overvoltage or undervoltage. The automatic recovery overvoltage and undervoltage protection device conforms to the modular design standard. When the power supply is unstable, its protection function will be activated automatically. Once the voltage exceeds a limited range of products, it will automatically cut off to protect the safety of electrical equipment and personnel. Specification: Function:Overvoltage and Undervoltage Protection Rated AC:230V 50Hz Maximum Transmit Current:40A Maximum Power: 8.8KVA Overvoltage action Cut-Off Value: > 275VAC +/ -5v Normal Voltage: 175-270 Vac Undervoltage Action Cut-Off Value: <165VAC +/ -5v Overvoltage and Undervoltage Cut-Off: <1s Power Transmission Delay After Power Failure: <60s Its Own Power Consumption : <2W Motor Life: 100,000 Times Size:77 x 35 x 45mm / 3.03 x 1.38 x 1.77in Installation :35mm DIN Rail Package List: 1 x Protector Note: When connecting the product for the first time, you must wait for about 1 minute. Only when the red light goes out, can the product work normally.