Features: 1.Protection Function: Can monitor 3 phase overvoltage, undervoltage, voltage unbalance, phase misalignment, phase loss fault, and zero line disconnection in real time. 2.LCD Screen Display: The protector uses an LCD screen to display the voltage value, fault status and setting parameters, with clear readings to ensure efficient work. 3.DIN Rail Installation: Adopt standard modular structure, 35mm rail type installation, with IP20 protection grade, compact in structure, easy installation and disassembly. 4.Adjustable Values: Each action time can be adjusted, such as overvoltage and undervoltage values ??and unbalanced values, etc., and has a wide range of applications. 5.Multiple Functions: Automatic reset or manual reset can be selected, the voltage protector has power on delay function, output test function and fault record query.Item Type: Voltage Monitoring RelayModel: JVR1000 ANMaterial: ABSMonitoring Circuit: L1, L2, L3, NRated Voltage (Phase Voltage): 115-277VAC, 50/60HzProtection Function: Overvoltage, undervoltage, voltage unbalance, wrong phase, phase loss, zero line disconnectionOvervoltage Regulation Range (Phase Voltage): 80-330VUndervoltage Regulation Range (Phase Voltage): 80-330VWorking Frequency: 45-65HzOutput Type: 1CO 1NCOvervoltage and Undervoltage Recovery Hysteresis: 1-20VOvervoltage and Undervoltage Action Time: 0.1-999sUnbalance Rate: 1-50%Unbalanced Hysteresis: 1-10%Unbalanced Delay: 0.1-999sPhase Loss Action Time: 0.1-30sPhase Error Action Time: 0.1-30sPower On Delay: 0-999sReset Mode: Automatic, ManualReset Delay: 0.1-999sDisplay Mode: Chinese LCD display each action statusContact Form: 1 set of NO NC contact, 1 set of NC contactContact Capacity: 6A 250VAC, 30VDC (resistive)Size: Approx. 80 x 43 x 54mm / 3.1 x 1.7 x 2.1inInstallation Method: 35mm guide railProtection Class: IP20Working Environment: -25-65??, ?85%RHMechanical Durability: 1000000 timesDielectric Strength: >2kVAC 1min1 x Voltage Monitoring Relay1 x User Manual