Product description A compact voltage protection module designed for direct connection to neutral and three live lines. It monitors supply voltage and responds when input voltage moves outside the preset ranges, helping protect equipment from sustained overvoltage and undervoltage conditions. Available in multiple rated current options to match load requirements. Key benefits Protects equipment from harmful voltage excursions by monitoring and reacting to overvoltage and undervoltage conditions. Multiple rated current options allow selection for different load sizes: 40A, 63A, 80A, or 100A. Clear terminal layout for N, L1, L2, L3 simplifies installation and wiring in distribution panels. Wide storage temperature range supports handling and storage in varied environments from 25 C to +55 C. Straightforward specification limits make compatibility and selection easier for electricians and technicians. What it does and how it solves problems Voltage monitoring and protection: detects when supply voltage rises above 230 V or falls below 210 V depending on configuration, then isolates or signals the circuit to prevent damage. This reduces downtime and extends the life of connected equipment. Scalable current ratings: choose the appropriate rated working current for the application to avoid overloading and ensure reliable operation under expected load conditions. Clear power terminals: direct connection to N, L1, L2, L3 supports common wiring schemes and reduces installation errors. Important attributes Color: 100A; white Power terminal: N, L1, L2, L3 Rated working current: 40A/63A/80A/100A Overvoltage range: 230300V Undervoltage range: 140210V Storage temperature: 25 C to +55 C Function: voltage monitoring and protection for connected circuits Compatibility and performance notes Designed for applications where neutral and three live conductors are present and where overvoltage and undervoltage protection is required. Choose the rated working current that matches the maximum continuous load to maintain reliable protection performance. Overvoltage and undervoltage ranges are fixed as specified and should be matched to the supply characteristics of the installation. Typical applications Electrical distribution panels in small commercial or industrial installations where threephase supplies or multiline protection are used. Protection for motors, compressors, and HVAC units that can be damaged by sustained low or supply voltage. Control panels and automation equipment that require upstream voltage monitoring to prevent faults and reduce maintenance. Installation and selection tips Verify system wiring includes terminals N and L1 L2 L3 before . Select the rated working current based on expected continuous load and any motor starting currents if applicable. Store the unit within the specified temperature range prior to installation to preserve performance. This module provides clear voltage protection specifications and multiple current rating options to help match protection to the system needs while keeping installation straightforward.