【Voltage and Current Meter】 This voltage protector instantly cuts off power when overvoltage, undervoltage, or overcurrent occurs, safeguarding your electrical equipment from damage. It automatically restores power once the voltage returns to normal. 【Circuit Protection】 Ideal for users or loads with a single-phase AC voltage of 220V, 50/60 Hz, and a rated operating current of 40A or less. Primarily used for overvoltage, undervoltage, or overcurrent protection in residential distribution lines or for single-phase electrical equipment. 【Real-Time Monitoring】 Features an LCD screen with dual display of overvoltage and overcurrent, providing clear voltage status at a glance. Real-time display ensures clearer monitoring. 【Easy to Use】 The overvoltage protector installs on a universal DIN35mm standard guide rail, requiring no screws for easy installation. Compact, practical, and functional design. 【Safe to Use】 Incorporates magnetic latching relays 40, preventing burnout from high current surges. The shell is made of high-quality, flame-retardant, and high-temperature resistant PC material with insulating protection. Action Time: 0.1S-30S (default 1s) Recovery Time: 1s to 500s (default 10s) Overvoltage Adjustable Range: AC230-300V (Default 270V) Undervoltage Range: AC140-210V (Default 170V) Rated Voltage: 220Vac Input Voltage: AC140-300V Rated Insulation Voltage: 450V Rated Current: 40A Output Contact: 1No Protection Level: IP20 Rated Frequency: 50/60 Hz Pure Power Consumption: ≤2W