Dual display adjustable voltage current protector D is suitable for single-phase AC 220V, 50/60Hz, rated working current 63A. It is mainly used for residential domestic box entry or overvoltage, undervoltage or overcurrent protection of distribution lines for single-phase electrical equipment. Its main characteristic is that when circuit has overvoltage or overvoltage problems undervoltage, overcurrent, product can cut off the power instantly to protect the electrical equipment from damage, in addition, protector can automatically turn on the power when the circuit voltage returns to normal values of overvoltage, overcurrent, Undervoltage and overcurrent of this product can all be configured by yourself and can be adjusted on the basis of local practical conditions. Specification: Rated power voltage: AC 220 V Operating voltage range: AC 80V-400V (simp Phase) Rated frequency: 50/60 Hz Electric current (gt;A)Adjustment range: 1-63A Over voltage (lt;U) Setting range: 230-300V Under voltage (lt;U) Setting range: 140-210V Error: 2 gt;U and lt;U Trip delay: 0.5 S Reset / Start delay: 1 s to 600 s< br Voltage measurement accuracy: 1% Nominal insulation voltage: 400 V Output contact: 1NO Electrical life: 10^5 mechanical life: 10 ^6 Protection degree: IP20 Installation: Din Rail Arctic size: 85*65*37mm/3.35*2.56*1.46in voltage & ; Current Protection - Turn off the power when circuit has overvoltage, undervoltage or overcurrent. Protect your home electrical equipment from damage. Automatic reconnection -- Turn on the power when the circuit voltage and current return to normal. Adjustable - Surge value range 230V-300V, range of Undervoltage values 140V-210V, overcurrent values 1-63A. Fault recovery time adjustable from 1 to 600 seconds Dual D Display - Two separate digital D displays can show actual voltage, current independently for easier and clearer reading, can be used as voltmeter and ammeter. Customizable -- The overvoltage, undervoltage and overcurrent values of this product can all be configured by yourself and can be adjusted according to local practical conditions. Packing list: />1 * Voltage and AMP Protector 1 * User Manual