Digital adjustable voltage and current protector: This is an intelligent protector that integrates monitoring of voltage, current, leakage current, and temperature. By collecting real-time signals, the microcontroller processes, analyzes, and evaluates them. When the parameters of the circuit exceed the specified values, the protector initiates a power disconnection to prevent electrical burnout. The protector allows for intelligent setting of parameters and offers multi-stage protection functions, including overcurrent, undercurrent, leakage current, short circuit, phase loss, neutral line absence, overvoltage, and undervoltage protection. It displays actual parameters and logs all fault information. In the event of a fault, maintenance personnel can quickly identify the cause by simply reviewing the fault information displayed on the protector, greatly facilitating the maintenance process.