V9 (Under Voltage Release for NB1, NBH8, NB1L, NB3LE, NBH8LE)
1. Protection of the load in the event of a voltage drop (between 70% and 35% of its rated value)
2. Positive safety (device's tripping when the voltage is disconnected) emergency stop by means of a button.
3. To be mounted on the left side of the MCBs/RCBOs thanks to the special pin.

• V9 Under Voltage Release