Answer to Question #224672 in Electrical Engineering for Zoleka

Question

Multiple Choose question


Question 1
Which of the following is an advantage of using bundled conductors in transmission
lines?
(1) They reduce radio interference and corona at the cost of increasing line series
reactance.
(2) They reduce line series reactance, radio interference and corona.
(3) They increase line charging reactance and series reactance.
(4) They have high tensile strength and increase the skin effect.

Answer 1

With increase in self inductance per phase will be reduced compared to single conductor line. This results in lesser reactance per phase compared to ordinary single line. Hence lesser loss due to reactance drop.

Bundled conductors per phase reduces the voltage gradient in the vicinity of the line. Thus reduces the possibility of the corona discharge.

Bundled conductors reduces radio interference due to the dact that magnetic field around it is not intense as solid conductors.

Answer is (2)