The V9 Under Voltage Release, compatible with NB1, NBH8, NB1L, and NBH8LE series, is designed to protect electrical loads in the event of a voltage drop, operating effectively when voltage falls between 70% and 35% of its rated value. It features a positive safety mechanism, ensuring that the device trips automatically when voltage is lost—enabling emergency stop control through a push-button. The V9 is conveniently mounted on the left side of MCBs or RCBOs using a dedicated pin connection for quick and secure installation.