Where an overhead line crosses or is in proximity to another overhead line, guarding arrangement shall be provided so as to guard against the possibility of their coming into contact with each other.
Minimum clearances in metres between lines when crossing each other
|
S/No. |
Nominal System Voltage |
11-
66 KV |
110
– 132 KV |
220 KV |
400 KV |
|
1 |
Low & Medium |
2.44 |
3.05 |
4.58 |
5.49 |
|
2 |
11 – 66 KV |
2.44 |
3.05 |
4.58 |
5.49 |
|
3 |
110 – 132 KV |
3.05 |
3.05 |
4.58 |
5.49 |
|
4 |
220 KV |
4.58 |
4.58 |
4.58 |
5.49 |
|
5 |
400 KV |
5.49 |
5.49 |
5.49 |
5.49 |
Technical Data of some common used Line Conductors (ACSR)
|
Conductor |
Area |
Stranding & wire diameter
(mm) |
Calculated |
Current |
|||
|
|
(Sq.Inch) |
Aluminium |
Steel |
D.C. |
Rating |
||
|
|
|
No. |
Dia. |
No. |
Dia. |
Resistance |
with |
|
|
|
|
|
|
|
(Ohm/Km) |
1 mph |
|
|
|
|
|
|
|
|
Wind |
|
|
|
|
|
|
|
|
Speed |
|
|
|
|
|
|
|
|
|
|
Rabbit |
0.050 |
6 |
3.35 |
1 |
3.35 |
0.54490 |
200 |
|
Dog |
0.100 |
6 |
4.72 |
7 |
1.57 |
0.27450 |
305 |
|
Coyote |
0.125 |
26 |
2.54 |
7 |
1.90 |
0.22140 |
380 |
|
Panther |
0.200 |
30 |
3.00 |
7 |
3.00 |
0.13750 |
510 |
|
Moose |
0.500 |
54 |
3.53 |
7 |
3.53 |
0.05517 |
880 |
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