Right of Way ( ROW ) In The Transmission Line

Meaning of ROW in the Transmission Line

• The right of way is a strip of land where the transmission line is constructed, erected, operated and maintain. 
• The transmission line is kept in the center of right of way ( ROW ). 
• The right of way clears all trees, structure and construction which interfere the power lines. 
• The maximum width of ROW is calculated by considering transmission line voltage, wind speed, sag, tower design, swing and other safety parameters. 
• The ROW is as per guideline of Ministry of Environment and Forest. The ROW for different transmission line is given as below in India.

ROW For Different Transmission Line Voltage

 

Transmission Line Voltage	Right of Way in Meters
11 kV	7
33 kV	15
66 kV	18
110 kV	22
132 kV	27
220 kV	35
400 kV S / C ( Single Circuit )	46
400 kV D / C ( Double Circuit )	46
± 500 kV HVDC	52
765 kV S / C ( Single Circuit With Delta Configuration )	64
765 kV D / C ( Double Circuit )	67
± 800 kV HVDC	69
1200 kV	89

 

• Only vertical Delta configuration of 400 kV S/C and Delta configuration of 765 kV S/C shall be permitted in the Forest Area.

Width Clearance For Conductor / Bundle Conductor

• The following width clearance would be permitted for below each conductor or conductor bundle.

Transmission line with bundle conductor	Width Clearance below each conductor or Bundle conductor (meter)
Up to 400 kV Twin Bundle	3
400 kV Triple Conductor	5
400 kV / ± 500 kV HVDC / 765 kV Quadruple Bundle	7
± 800 kV HVDC / 765 kV Hexagonal Bundle	10

 

Minimum Clearance Between Trees and Transmission Line

• The minimum clearance between trees and transmission is given as below.

Transmission Line Voltage	Minimum Clearance Between Transmission Line and Trees
11 kV	2.6
33 kV	2.8
66 kV	3.4
110 kV	3.7
132 kV	4.0
220 kV	4.6
400 kV	5.5
± 500 kV HVDC	7.4
765 kV D / C	9.0
± 800 kV HVDC	10.6
1200 kV	13

 

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