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how many ht 11 kv cable size for 11kv 2000 kva 11kv*433v transformer ?
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Answer Posted / prashant soni
HT Cable size dependson fault level to be withstood and its duration..
If you take XLPE, HT Cable of ALU conductor,
condiering 350MVA for 1 sec *(18.37kA), min. C/A will be found out by Area(A) = (Short ckt current (kA)*Square root of Time)/k
k is constant = 0.094 for XLPE ALu conductor.
This will give you min. size required for HT system (11/22/33/6.6/3.3kV)
Choose nearest standard higher size for HT Cable..
primary 3*240 sqmm AL cable
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