  Three conductors of a 3-phase overhead line are arranged in a horizontal plane 6 m apart. The diameter of each conductor is 1·24 cm. Find the capacitance of each conductor to neutral per 100 km of the line.  [0·785 μF]

Question

Three conductors of a 3-phase overhead line are arranged in a horizontal plane 6 m apart. The diameter of each conductor is 1·24 cm. Find the capacitance of each conductor to neutral per 100 km of the line.  [0·785 μF]

Step 1

The capacitance of each conductor to neutral per 100 km of the line should be calculated as: -

Step 2

The diameter of the conductor is given as D=1.24 cm

So, the radius if each conductor is

r= (1.24/2) cm = 0.62 cm

The separation between the conductor a-b is d1=6 m

The separation between the conductor b-c is d2=6 m

The separation between the conductor c-d is d3=12 m

The figure for the conductor’s arrangement is shown below:

Step 3

The capacitance of each conductor can be...

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Electrical Engineering 