How to calculate voltage drop in copper and aluminium cable?

I have laid 240Sq.mm Aluminium cable for the length of 600 Mtrs in 1 Mtrs underground.
Normal load is 150A. Transformer is 630KVA, 6.KV/433V. But, I am getting only 395 Volts when load. How to calculate voltage drop and what is the permissible voltge drop for this circuit?



How to calculate voltage drop in copper and aluminium cable? I have laid 240Sq.mm Aluminium cable..

Answer / viren89desai@yahoo.co.in

http://www.openelectrical.org/wiki/index.php?title=Cable_Sizing_Calculation

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