Question
Download Solution PDFSelect the correct statement for a medium overhead transmission line.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFClassification of overhead transmission line
Based on the length, the transmission line is classified as:
1.) Short Transmission Line: Length < 80 km
2.) Medium Transmission Line: 80 km < Length < 200 km
3.) Long Transmission Line: Length > 200 km
Explanation
The 3ϕ power flowing in an overhead transmission line is given by:
\(P=\sqrt{3}V_LI_Lcosϕ\)
\(I_L={P\over \sqrt{3}V_Lcosϕ}\)
where, P = Power
VL = Line Voltage
IL = Line current
cosϕ = Load power factor
From the above expression, it is observed that the load current is inversely proportional to the load power factor.
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