If a utility has given its avaliable 3 phase fault current for a facility to be used in a short circuit study is it possible to find or estimate the avaliable L-G fault current from the utility? Can you simply divide the 3phase fault current by 1.73 to get an estimate or must you know the zero sequence impedance from the utility?
Someone was trying to tell me that you can simply divide the 3phase fault current by 3 as a rough estimate but I dont believe that is correct?
Someone was trying to tell me that you can simply divide the 3phase fault current by 3 as a rough estimate but I dont believe that is correct?