Features:1. The automatic recovery overvoltage and undervoltage protection devices comply with modular design standards.2. When the power supply is unstable, the protection function will be automatically activated. Once the voltage exceeds the limited range of the product, it will automatically cut off to protect the safety of electrical equipment and personnel.3. When the power supply returns to normal, devices will power up again within one minute.4. Fully automatic over-voltage and under-voltage protectors are suitable for users or loads with single-phase voltage of 230V/110V, 50/60Hz, and rated working current of 40A / 50A / 63A / 80A and below.5. Over-voltage and under-voltage protectors has an intelligent LCD display and a large current-limit switch.