To prevent unwanted tripping of the circuit breaker during short voltage drops, this delay unit MN can be installed to delay the undervoltage trigger MN. The tripping occurs only when the voltage is too low for a specific period. Delay unit MN undervoltage trigger 100/130V AC/DC, adjustable time. Adjustable delay time: 0.5 s - 1 s - 1.5 s - 3 s. It can be deactivated with an emergency stop switch to achieve an immediate shutdown of the circuit breaker.