To prevent unwanted tripping of the circuit breaker during brief voltage drops, this delay unit can be installed to delay the undervoltage trigger. The tripping occurs only when the voltage is too low for a specified period. Delay unit for undervoltage trigger 200/250V 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 immediate disconnection of the circuit breaker.