A
anthanth
A volt drop calculation that i could do with some help with is the 3 phase VD
I fully understand the single phase vd calculations but just wanted to get a confirmation when using 3 phase.
e.g
Say a large load of 30Kw is 200m from the point of distribution and you need to find out the volt dropped.
Do you use 30000/230 - 130 Amps or
do you use 30000/415 - 72 Amps????
Now lets say using a 50mm conductor the differences are below.
230 ---- 0.84 x 130 X 200 (m) /1000 = 21.84 volts dropped
415 ---- 0.84 x 72 x 200 (m) /1000 = 12.0 volts dropped
At 415 v this would be approx 3% vd!!
Have a got this correct or would some body like to correct me?
Just looking for some help................
many thanks
I fully understand the single phase vd calculations but just wanted to get a confirmation when using 3 phase.
e.g
Say a large load of 30Kw is 200m from the point of distribution and you need to find out the volt dropped.
Do you use 30000/230 - 130 Amps or
do you use 30000/415 - 72 Amps????
Now lets say using a 50mm conductor the differences are below.
230 ---- 0.84 x 130 X 200 (m) /1000 = 21.84 volts dropped
415 ---- 0.84 x 72 x 200 (m) /1000 = 12.0 volts dropped
At 415 v this would be approx 3% vd!!
Have a got this correct or would some body like to correct me?
Just looking for some help................
many thanks
