Voltage Phase Sequence Protector 3 Phase 3 Wire Over Under Voltage Protector Monitor Relay AC 208‑480V Item Type: Voltage Phase Sequence Protector Material: ABS Input Circuit: L1, L2, L3 Rated Supply Voltage: 208-480VAC 50/60Hz Working Frequency: 45-65Hz Output Type: 1CO and 1NC 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: Auto Manual Reset Delay: 0.1-999s Display Mode: Chinese LCD display each action status Contact Form: 1 group of normally open and normally closed contact, 1 group of normally closed contact Contact Capacity: 6A 250VAC 30VDC (resistive) Dimension(LxWxH): Approx.80x43x54mm/3.1x1.7x2.1in Installation Method: 35mm guide rail Protection Class: IP20 Working Environment: -25℃ to 65℃, ≤85%RH Mechanical Durability: 1,000,000 times Dielectric Strength: >2kVAC 1min