- #1

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Any body please help me.

Thnx

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- Thread starter Arifur
- Start date

- #1

- 8

- 0

Any body please help me.

Thnx

- #2

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- #3

- 486

- 130

the minimum conductor cross section from the temperature rise-losses and heat evacuation are

important. However, in my opinion, the voltage drop it is important too and it could require to

increase the cross section.

The voltage drop depends on power factor[cos(fi)] and reactance of the cable also.

DV=R*I*cos(fi)+X*I*sin(fi)

For resistive load cos(fi)=1 [fi=0] and sin(fi)=0 If the circuit is entire inductive or entire capacitive the above formula does not change.

The neutral current is the same as live for single-phase system so you have to double the voltage drop.

In three-phase and neutral system only unbalance current will flow through neutral and the

cross section of the neutral is limited to ½ of live.

For voltage drop you have to multiply the above formula by sqrt(3).

I am positive windadct forgot it simply.

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