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how to calculate the current if i know power in MW and
voltage 11kv/415v and also want to know that incoming
cables for trnsformer
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Answer Posted / cfanez
Girish,since the power is in MW,it means that we are looking
for current in consideration of power factor.If it were in
MVA,then the calculation given by Rajkumar is ideal.
5000kW=1.732*11*Ip*PF (assume pf =0.85)
5000=1.732*11*Ip*0.85
primary current Ip=308.7A
5000=1.732*.415*Is*0.85
Secondary currentIs=8,183.6A
Select cable capable from your table.If surface then
alluminum cable should be selected,if underground,suitable
hV cable should be selected to suit the primary and
secondary current carrying capacities respectively.
| Is This Answer Correct ? | 15 Yes | 6 No |
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