@ marmite According to standards step-and-touch potentials must be lower than 50V which makes this practice impossible. I dont know if this practice is only applicable in our country? I want to set my value to 10% of the full load current, but need advise on the pro's and the con's?
Yes you are correct it is the full load current. I must design the NER for the neutral of the secondary side(star) I want to limit the current to a value of 10% of the full load current. This will be to prevent nuisance trips (unbalancing? any other reason) Is this statement correct? Limit the...
I'm currently designing an NER for a delta star transformer. It is a 3500kVA, 11kV/6.6kV transformer (Ifault = 308A). I've calculated the required values. It however varies between 30ohm (127A) and 127ohm (30A). My question is do I go for the lower current or the higher 1? I know that a low...
