How to calculate HT XLPE CABLE for 11 kv / 433 v , 1500 kva
oil type transformer system?
plz provide step by step calculation
Answers were Sorted based on User's Feedback
Answer / rasel-amie
HT Cable select, its depend of incoming capacity of feeder
line. say feeder capacity 100 MVA SO Calculate current I=
100*100/11*1.73=5.25kA. So we can select of HT Cable for
minimum short ckt current carrying capacity of minimum 5.2kA.
Is This Answer Correct ? | 10 Yes | 14 No |
Answer / er.rupam dwivedi
A=kva x 1000/1.732x ht voltage=ht cable selection
Is This Answer Correct ? | 2 Yes | 6 No |
Answer / govind bisht
Assume PF of transformer is .8.
rating of transformer=1500kVA=1500X.8=1200kW
V=433(3phase)
So that maximum current-
I= P/V*PF
=1200*1000/1.732*433*.=1600A
So cable size required if copper cable
1mm=4amp= 400sqmm(by consedering all factors)
For aluminium cable
1mm=2.5A=640sqmm
Is This Answer Correct ? | 61 Yes | 109 No |
Answer / m.jagadeeshwar
for 11kv side current = kva*1000/1.732*11000
= 78.73 amps
for 78.73 amps 3 core 25 sqmm cable is sufficient
Is This Answer Correct ? | 22 Yes | 84 No |
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