The diagram below (not to scale) shows a symmetrical arrangement of conductors in a 500m long 3-phase distribution line on a factory site. The individual conductors have a radius of 20mm and are arranged at the corners of an equilateral triangle with a distance between conductor centers (labelled D in the diagram) of 1000mm. The line is located in air which has a permitivity of 8.85-10-12 F/m. Which of the following corresponds to the capacitance of one phase to neutral for this 500m long section of line? D D D OA711x10- OB 1.42 x 10-8 F Oc1.42 x 10-11 F Op. 1.60µF S

The diagram below (not to scale) shows a symmetrical arrangement of conductors in a 500m long 3-phase distribution line on a factory site. The individual conductors have a radius of 20mm and are arranged at the corners of an equilateral triangle with a distance between conductor centers (labelled D in the diagram) of 1000mm. The line is located in air which has a permitivity of 8.85-10-12 F/m. Which of the following corresponds to the capacitance of one phase to neutral for this 500m long section of line? D D D OA711x10- OB 1.42 x 10-8 F Oc1.42 x 10-11 F Op. 1.60µF S

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.10P: A 60-Hz, three-phase three-wire overhead line has solid cylindrical conductors arranged in the form...

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A single-phase overhead transmission line consists of two solid aluminum conductors having a radius of 3 cm with a spacing 3.5 m between centers. (a) Determine the total line inductance in mH/m. (b) Given the operating frequency to be 60 Hz, find the total inductive reactance of the line in /km and in/mi. (c) If the spacing is doubled to 7 m, how does the reactance change?
For a three-phase three-wire line consisting of three solid cylindrical conductors each with radius r and with equal phase spacing D between any two conductors, the inductance in H/m per phase is given by 2107ln(Dr)4107ln(Dr)6107ln(Dr) where r=e14r=0.778r
A 60-Hz, three-phase three-wire overhead line has solid cylindrical conductors arranged in the form of an equilateral triangle with 4-ft conductor spacing. The conductor diameter is 0.5 in. Calculate the positive-sequence inductance in Wm and the positive-sequence inductive reactance in /km.
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Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-phase line in Problem 4.18. Also calculate the line-charging current in kA/phase if the line is 110 km in length and is operated at 230 kV. Neglect the effect of the earth plane.
For the case of double-circuit, bundle-conductor lines, the same method indicated in Problem 4.27 applies with r' replaced by the bundles GMR in the calculation of the overall GMR. Now consider a double-circuit configuration shown in Figure 4.36 that belongs to a 500-kV, three-phase line with bundle conductors of three subconductors at 21 in. spacing. The GMR of each subconductor is given to be 0.0485 ft. Determine the inductive reactance of the line in ohms per mile per phase. You may use XL=0.2794logGMDGMR/mi/phase