Voltage Drop

How to can calculate voltage drop in a cable?

Questions by mpanwar

Showing Answers 1 - 2 of 2 Answers

bijumenon

  • Oct 25th, 2009
 

According to me this is how the voltage drop in a cable is calculated.
If*SQRT(Rf Cos(phi) + Xf sin(phi)) / no. of runs

where....
If is the full load current
Rf and Xf is the resistance and reactance of the feeder. (Rf = R *L/1000; L= length of the feeder).

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pveee

  • Dec 29th, 2011
 

Voltage drop in 3 phase circuits is Vd=(1.732xI(RcosФ + XsinФ)L)/(1000xno.of runs)
I is full load current,
R resistance of the conductor,
x resistance of the conductor,
L length of conductor in meters.

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