Features MULTIFUNCTIONAL PROTECTOR: Strictly manufactured, carefully protected, and automatically reset to prevent prolonged power outages, quick response, and eliminate potential over voltage and under voltage dangers. OVERLOAD AUTOMATIC POWER OUTAGE: The protector can effectively avoid damage to electrical equipment and machines caused by high voltage at the moment of power on, and avoid damage to electrical equipment and machines caused by short term power on and off MULTIPLE PROTECTION: Overvoltage and undervoltage protection, voltage imbalance protection, phase fault and phase failure protection, overcurrent protection, automatic reset, and other multiple protection functions. CLEAR DIGITAL DISPLAY: The digital display displays the working voltage and current in real time, and the current and voltage display is clear at a glance. The panel buttons are complete and easy to operate, making it easy to use. EASY INSTALLATION: The back design is standard for 35mm guide rail installation, making it easy and secure to install. This protector has quick response speed and sensitive internal components, saving you work time and making it more practical. Specification: Item Type: 3 Phase Undervoltage Protector Mode: CHLT 615 Material: PC Rated Power Supply Voltage: AC230V Working Voltage Range: AC120V-300V Rated Current: 63A (adjustable overcurrent range 1-63A) Rated Frequency: 50, 60Hz Hysteresis: Overvoltage and Asymmetry: 5V Under Voltage: 5V Asymmetric Delay: 10s Voltage Measurement Accuracy: Less than or equal to 1% (within the entire range) Rated Insulation Voltage: 450V Output Contact: 1NO Electrical Life: 10⁵ times Mechanical Life: 10⁵ times Protection Level: IP20 Pollution Level: 3 Altitude: Less than Approx. 2000m / 6561.7ft Working Temperature: -5 ℃ to 40 ℃ Humidity: Less than or equal to 50% or 40 ℃ (non condensing) Storage Temperature: -25 ℃ to 55 ℃ Installation: 35mm guide rail Package List:1 x Protector 1 x Manual  Package List 1 x Protector 1 x Manual