Selection of Conductor for Transmission lines


Selection of Conductor for Transmission lines



A common standard that have been laid down by various authorities in India (like Central Electricity Authority, Central Electricity Board) for selection of  conductor for transmission lines is given below in the table.

S.No
Operating Voltage
KV
Name
 Of
ACSR
Conductor
Current Carrying Capacity at 75°C (Amp)
Size and Stranding
Over all Dia.
cm.
Unit Wt.
Kg/mt
Aluminum
No/mm
Steel
No/mm
1.
33/66
Dog
300
6/4.72
7/1.57
1.42
0.394
2.
66/132
Panther
480
30/3.0
7/3.0
2.10
0.976
3.
220
Zebra
735
54/3.15
7/3.15
2.86
1.62
4.
220/400
Moose
800
54/3.53
7/3.53
3.18
2.02


Number of Insulator disc Required for Transmission line


Table given below describe number of insulator disc required for different transmission lines which is depend on the operating voltage of the transmission line for which it is designed. One more disc is inserted at the diversion end or dead end of transmission line due to extra stress on the line. 

S.No
Operating Voltage in
KV
Number of Discs
Suspension
Assembly
Tension Assembly
1.
11
1
1
2.
33
2
3
3.
66
5
6
4.
132
9
10
5.
220
14
15
6.
400
21
22
Length of Transmission line

S.No
Line Voltage
KV
Power Transfer capability per circuit (MW)
50 Km
100 Km
200 Km
300 Km
1.
66
22
11
5.5
3.6
2.
132
120
60
30
20
3.
220
400
200
100
67
4.
400
1500
750
375
250

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