PS12 Inductance of 3 Phase Transmission Lines

[@gobeyondyourknowledge3794]

A 3 phase, 220 KV, 50 HZ transmission line consists of 30 mm diameter conductors spaced 2.5 meter apart in the form of an equilateral triangle. If the temperature is 38⁰C and atmospheric pressure is 76cm. Calculate the corona loss/km of the line. Assume the irregularity factor as 0.83.

[@subhojitghosh7532]

Explain why the horizontal arrangement is better as compared to when conductors of the same phase are placed in the same horizontal plane.

[@surendrakverma555]

Very good lecture Sir. Thanks 🙏🙏🙏🙏🙏

[@rajeevkumar1237]

In question (time 12:34) u have considered untransposed line. That why u have not used the concept of GMD and GMR. Am I correct.? 2.if nothing is mentioned in question what should we consider -transposed or untransposed??

[@priyasrinivasan8890]

Sir..in 13.44 ....ln(1/2)=--ln(2)...so Negative sign will be coefficient of j term...I think so..its correct or wrong

[@harunmaliksvlogs3313]

sir how did you get j0.866= j root 3?

[@Xyzengineer]

√3/2 is 0.866 and here the 1/2 is taken to power of log

[@Mhalxmi-ru7vc]

thank you sir

[@Suman_shukla]

Sir i have doubt in directional relay based question.in numerical section...How can i ask that question ??

[@rajeevkumar1237]

What is the significance of imaginary term in the expression of inductance

[@rajeevkumar1237]

In an untransposed 3 phase transmission line a positive sequence current may cause a negative sequence voltage drop??plzz explain sir

[@rajeevkumar1237]

Ans is given " yes it will induce " came in ese 2002 .plzz explain the reason

[@Dharani12335]

Sir For inductance due to 1st conductor in calculation part I think imaginary part will be -ve such that (-j0.866ln2)

[@Dharani12335]

@@lecturesinelectricaleng sir time At 13:47

[@Dharani12335]

@@lecturesinelectricaleng okk sir thank you

[@priyasrinivasan8890]

Sir...in video 3.33 how the current lagging by 120 deg...pls explain

[@priyasrinivasan8890]

@@lecturesinelectricaleng ok Sir...Thank you so much

[@Dharani12335]

Sir Time at 13:47

[@ppm2300]

Provide formula to find Inductance 1,3 phase

[@ppm2300]

Thanks sir