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Classification of Transmission Lines

The transmission lines are classified according to distance of transmission as follows:

1.Short transmission line. Length less than 60 km and operating voltage less than 20 kV.

2.Medium transmission line. Length between 60 and 150 km and line voltage between 20 kV and 100 kV.

3.Long transmission line. Length above 150 km and line voltage above 100 kV.