15.1.6 Operation principle M12255-3 v12The duration of the trip output signal is settable (tTripMin). The pulse length should belong enough to secure the opening of the circuit breaker.There is a single input (TRINP_3P) through which all trip output signals from theprotection functions within the IED or from external protection functions via one ormore of the IEDs' binary inputs are routed. It has a single three-phase trip output(TRIP) to connect to one or more of the IEDs' binary outputs, as well as to otherfunctions within the IED requiring this signal.Section 15 1MRK 511 408-UUS ALogic404 Phasor measurement unit RES670 2.2 ANSITechnical manual