General description The Voltage Regulator is a 230V 40A automatic recovery overvoltage and undervoltage protection device designed for DIN rail mounting. It features a modular design and is built with high-quality electronic components to ensure reliable performance. This device automatically activates its protection function when the power supply is unstable, shutting down to safeguard electrical equipment and personnel. Technical specifications AC rated voltage: 230V 50Hz Maximum transmitting current: 40A Usage When the voltage exceeds the limited range, the device will automatically shut down. The green indicator light shows that the power supply is working normally. The red indicator light indicates overvoltage or undervoltage conditions. After plugging in for the first time, wait about 1 minute for normal operation, indicated by the red light going out.