dear sir,
we have many 11kV/400V, 1600 KVA transformer, impedance 6%.
our system is TN-C type.
inside our LV main switch board, the neutral busbar is connected to earth electrode by 12 mm seq. bare copper cable.
how do we calculate for the neutral grounding cable size ?
please advise.
thank you.
we have many 11kV/400V, 1600 KVA transformer, impedance 6%.
our system is TN-C type.
inside our LV main switch board, the neutral busbar is connected to earth electrode by 12 mm seq. bare copper cable.
how do we calculate for the neutral grounding cable size ?
please advise.
thank you.