Feature: 1. The automatic recovery overvoltage and undervoltage protection devices comply with modular design standards. 2. The circuit board of the product adopts high-quality electronic components with reliable performance. 3. When the power supply is unstable, its protection function will be activated automatically. Once the voltage exceeds limited range of the product, it will automatically cut off to protect the safety of electrical equipment and personnel. When the power supply returns to normal, the device will power up again within 1 minute. 4. The green indicator light shows that the power supply is normal. The red indicator light shows overvoltage or undervoltage. 5. Maximum transmission current: 40A, maximum power: 8.8KVA, overvoltage action cut‑off value:> 275VAC +/‑ 10V. Specification: Condition: 100% Brand New Material: ABS Model: SVP-911 Maximum Transmission Current: 40A Maximum Power: 8.8KVA Overvoltage Action Cut-Off Value:> 275VAC +/- 10V Undervoltage Action Cut-Off Value: <160VAC +/- 10V Overvoltage and Undervoltage Cut-Off: <1s Power Transmission Delay After Power Failure: <60s Own Power Consumption<2W Motor Life=: 100000 Times Installation: 35mm DIN Rail. Package List: 1 x Over-Voltage Under-Voltage Protective Device Note: When connecting the product for the first time, you must wait for about 1 minute, and the product can work normally after the red light goes out.