63a 80a Din Rail Adjustable Over Under Voltage Protective Device - Current. Features: 1.LCD display with backlight , can display total active energy (kWh), real time current (A), voltage(V), active power (W). 2.LCD display kWh (4 digital+1 decimal) , Bi-directional total active energy measurement, reverse active energy measure in the total active energy. 3.Product self-design has function of lighting protection. 4.Overvoltage protection, under voltage protection and over-current protection can select auto-Reclosing mode or manual--Reclosing mode. 5.In case of over-voltage fault, under-voltage fault or over current fault in single phase line, the product can power off the line and can automatically restore. connecting the line over a time delay after voltage of the lien is recovered to normal condition. 6.In case of transient over voltage in line, the product can protect the equipment from false operation. 7.In case that the line subjects to unstable voltage or sudden power-off and power-on due to loosened connection and other fault, the product will disconnect the line. 8.When fault voltage of the line reaches the peak, the product itself will not be damaged. 9.Under over-current protection mode , you also can select Malignant load protection (Pure Resistive Load limit) which is used for Apartments and Student Dormitories electric safety. 10.You can select the circuit output cycle switch on/off mode. 11.Led indication of overvoltage protection, under voltage protection and over-current protection. 12.Diversified design for the protection , you can closed t any one of overvoltage protection, under voltage protection and over-current protection in any time. Specifications: Product Name: Over Under Voltage Protective Device Type: 63A/80A (Optional) Model Number: SVP-917 Material: Metal&Plastic Size: 100x36x67.5mm/3.94x1.42x2.66in Input Working Voltage: 85~300V Overvoltage Protection Value: 85-300V (Default 270V) Under Voltage Protection Value: 85-300V (Default 170V) Over Current Protection Value: 1-63A (Default 40A; 1-80A(Default 60A Special Order) Rated Frequency: 50/60Hz Delay in Switch on After Power Off: 2-255V (Default 2s) Voltage Circuit Power Consumption: 1W Current Circuit Power Consumption: