I have a client that has an equipement in an area where sometimes electricity goes on and off many times a minute , and it can dammage his equipement, so he asked me for protection system that works as following:
1- the system needs to starts with an ON button (on button or push button or whatever)
2- if the power goes off the system will shutdown (that is normal)
3- But if the power goes on again, the system will not start automaticly
4- it needs some sort of timer, that will check if the electrity was back for 5 mins for example without any cut again to start the system
5- and of corse an OFF Button.
NB : I DONT THINK MY CLIENT CAN AFFORD A SMART RELAY.