u/Secret-Recognition23

Hey guys new here to the field just trying to expand my knowledge, when testing vcb,ocb,acb how do I know what trip time is sufficient when testing trip coils is there a standar? same with ductoring how many mic ohm per hv for breakers/ contactors do u suggest, guys just say its time and being around the gear but is there a standard or guideline you go off for how quick something should open/close, what readings to look for any help would be greatly appreciated

Out of Australia any help is greatly appreciated cheers