Feature: 1. AUTOMATIC TRANSFER FUNCTION: When the main power supply fail or the voltage is abnormal, the ATS automatically transfer the load from the main power supply to the standby power supply to ensure uninterrupted power supply. Priority is L1>L2>L3. ATS ensure smooth switching between the primary and backup power supplies, preventing power fluctuations or interference. After the main power supply recovers, the ATS automatically transfer the load back to the main power supply to ensure a seamless system restart 2. FLEXIBLE SETTINGS: This three phase automatic transfer switch enables you to freely prioritize mains power, generator, and inverter. You can set the voltage threshold for switching, so automatically switch when there is under voltage or over voltage. The switch speed can also be set within the range of 1s to 600s, with a default of 30s 3. ADJUSTABLE PARAMETERS: The transfer time, reset time, over under voltage protection, and overcurrent protection parameters are all adjustable within the specified range 4. FLAME RETARDANT MATERIAL: The shell of the automatic transfer switch is made of high fireproof PC material, which is not easy to burn and ensure safe use. Has the characteristics of sensitive to operate, accurate measurement and minimal heat generation. The beautiful design show the exquisite craftsmanship 5. WIDE RANGE OF APPLICATIONS: ATS is widely used in power system that require continuous and stable power supply, including commercial and industrial buildings, medical facilities, data centers, and communication base stations Specification: Item Type: Automatic Transfer Switch Model: CHLT-GX3 Material: Flame retardant PC Power Terminals: N, L1, L2, L3 Auto Reclosing Delay(Ton): 1-600s Return Priority Stage Delay: 1-600s Switch Delay To Reserve Phase: <0.2s Voltage Hysteresis: 5V Overvoltage Trip Delay: 0.1s; ≥350V: 0.02s Undervoltage Trip Delay: 0.1s; ≥350V: 0.02s Voltage Accuracy: <1% Maximum Operating Phase Voltage: 350V Rated Operating Current: 63A Maximum Operating Current: 80A Pollution Degree: 3 Altitude: ≤2000m Operating Temperature: -25℃~+50℃ Relative Humidity: ≤50% at 40℃(non condensing) Wire Size: 0.5mm²-1mm² Installation: 35mm standard mounting rail. Package List: 1 x Automatic Transfer Switch 1 x User Manual