Undervoltage release MN for P25R. Operating voltage (Ue) 220-240V. To ensure monitoring of the power supply of several machines. Prevents uncontrolled restart of the motors. Causes the associated circuit breaker to be triggered when the voltage drops (response threshold between 70 and 35% of Un). The undervoltage release only allows the device to be switched on again when the voltage is restored. Emergency stop via opening button.