Advanced protection system: Realtime voltage and current monitoring with automatic power cutoff during dangerous conditions. Protects against overvoltage, undervoltage and overcurrent events. Automatically restores power when conditions normalize, keeping electrical equipment safe from surges. Safety thresholds: Fixed voltage protection ranges (130V 300V overvoltage, 80V 210V undervoltage) with set current limits. LCD display shows live readings and standby power consumption, enabling control for different appliances and environments. Multifunction monitoring display: Toggle between voltage, current, frequency and power. Clear red/green status indicators and an energysaving dimming mode for intuitive monitoring, while the refreshrate display (>1000 Hz) delivers accurate readings. Professional installation compatibility: Designed for standard 35mm DIN rails in residential or commercial electrical panels. Compact size 85*50*37 mm with 40A or 63A rated current options, suitable for wholehouse protection or specific circuit applications. Use scenarios Wholehouse protection: Install on the main distribution panel to guard the entire residence from surges and abnormal voltage events, reducing risk to all connected devices. Dedicated circuit protection: Configure for a value home office or entertainment setup (PCs, NAS, monitors, audio/video gear) by setting appropriate voltage thresholds and current limits to prevent nuisance trips while safeguarding equipment. Small commercial protection: Use on critical circuits such as network equipment or pointof systems in a small business, leveraging the 63A version for reliable, DINrail mounted protection.