A 300sq mm cable is to be laid for 600mtr. Distance.
As the distance is large so there are considerable voltage drop at the receiving side.
How can we cope up with this voltage drop at the receiving end? We want a constant voltage ofd 415 V at receiving end irrespective of input voltage?


The system is 3 phase, Aluminium conductor is being used
Load of 400 A .
The requirement is to get a constant voltage level of 415V at receiving end

Here is an online calculator for metric values:

http://www.monachos.gr/eng/calculators/voltage_drop.htm

You also need to know if the system is three phase or single phase, the load in amperes or watts, and the type of wire material to complete the calculations.

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Originally Posted by tkrussell

Here is an online calculator for metric values:

http://www.monachos.gr/eng/calculators/voltage_drop.htm

You also need to know if the system is three phase or single phase, the load in amperes or watts, and the type of wire material to complete the calculations.

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The system is 3 phase, Aluminium conductor is being used
Load of 400 A .
The requirement is to get a constant voltage level of 415V at receiving end

Sorry I see the calculator does not work well, even with the correct values.

Assuming the supply voltage is 480 volts, and assuming unity power factor of 100 %, aluminum wire 253 mm squared will have a Vd of 58 volts, delivering 422 volts.

If the load has either inductive or capacitive characteristics, then increase the wire size to the next size or so.

When I design systems for that distance, I transmit power at a higher voltage and transform it down at the receiving end.