Over Under Voltage Protective Device Adjustable Auto Reset Protector 240V‑300V 40A Item Type: Over Under Voltage Protector Material: Flame retardant PC. Current: 1-40A Over Voltage Protection Value Range uvo: 240V-300V Under Voltage Protection Value Range uve: 140V-210V Shut Down Delay Time: 2s, 1-300s adjustable. Self Recovery Protection Delay Time: 30s, 1-300s adjustable. Rated Frequency: 50/60Hz Error: 2% Voltage Measurement Accuracy: 1% Rated Insulation Voltage: 400V Output contact: 1No Electric Life: 100,000 Times Mechanical Life 1,000,000 Times Protection Grade: IP20 Altitude: ≤ 2000m Operating Temperature: -50 ℃ -55 ℃ Humidity: ≤ 50% at 40 ℃, non condensing. Humidity Temperature: -30℃ - 70℃