LCD 3 Phase 4 Wire Voltage Monitoring Relay Undervoltage Overvoltage Protection Relay 115‑277VAC Item Type: Voltage Monitoring Relay Model: JVR1000 AN Material: ABS Monitoring Circuit: L1, L2, L3, N Working Frequency: 45-65Hz Output Type: 1CO 1NC Overvoltage and Undervoltage Recovery Hysteresis: 1-20V Overvoltage and Undervoltage Action Time: 0.1-999s Unbalance Rate: 1-50% Unbalanced Hysteresis: 1-10% Unbalanced Delay: 0.1-999s Phase Loss Action Time: 0.1-30s Phase Error Action Time: 0.1-30s Power On Delay: 0-999s Reset Mode: Automatic, Manual Reset Delay: 0.1-999s Display Mode: Chinese LCD display each action status Contact Form: 1 set of NO NC contact, 1 set of NC contact Contact Capacity: 6A 250VAC, 30VDC (resistive) Size: Approx. 80 x 43 x 54mm / 3.1 x 1.7 x 2.1in Installation Method: 35mm guide rail Protection Class: IP20 Working Environment: -25-65℃, ≤85%RH Mechanical Durability: 1000000 times Dielectric Strength: >2kVAC 1min