At the end of the 8 km overhead line given in the figure below, there are two distribution transformers, one of which is 800kVA and the other is 1200kVA, operated with power coefficients of 0.6 and 0.8, respectively. The end-of-line voltage is 6kV. Find the required rated cross section and line head voltage so that the power loss on the line is less than %pk = 10.

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Author:Robert L. Boylestad
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At the end of the 8 km overhead line given in the figure below, there are two distribution transformers, one of which is 800kVA and the other is 1200kVA, operated with power coefficients of 0.6 and 0.8, respectively. The end-of-line voltage is 6kV. Find the required rated cross section and line head voltage so that the power loss on the line is less than %pk = 10.
 
1=8km
A
kcu = 56m2mm2
x = 0,4Q/km
Si = 800 kVA
cospi = 0,6
S: =1200KVA
coso2 = 0,8
U=6kV
Norm iletken kesitleri (mm?)
2,5
35
185
4
50
240
6
70
300
10
95
400
16
120
500
25
150
630
Transcribed Image Text:1=8km A kcu = 56m2mm2 x = 0,4Q/km Si = 800 kVA cospi = 0,6 S: =1200KVA coso2 = 0,8 U=6kV Norm iletken kesitleri (mm?) 2,5 35 185 4 50 240 6 70 300 10 95 400 16 120 500 25 150 630
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