Question

a) A 3 phase transmission line is arranged in a horizontal plane with a spacing of 2.5m. Diameter of conductor is 2 cm. Find the Inductance/phase/m. b) If the same transmission line is rearranged at the edges of an equilateral triangle so that the inductance remains the same, find the sides of the equilateral triangle. c) If the length of transmission line for the above equilateral triangle arrangement is 120km, Voltage is 33kV at 50HZ. Find the charging current per phase.

Answer 1

a 2-sm space col= 63 R Lph 20107 in 012 D3 D3 2-sm 2.5m Na rb id 7:2cm Ya = ob = 8e= 0.77 && R 2012 8=2010²m LPM = et en C2-57 (29) (57) 0.7788 & 102 Lpn = (2 2157 ) (6) 12 a 15 Lo 1.2 a Lph = H/praxe m space col. a.sm 0 : 239 2 cm R Lph = 20 10² in D2 D23 DS) 2.5 2.50 rá rý od 2.5m Lph = 12 24 6 เก 2-5702-5) (2.5) (6-7783d12) Lpd = 2007 in * (2427) (5.772 167 8-7788 & 10² Lph 1.154 a lo Lph= -6 1.054 lo 166 H/Phax Im

Charging carent (se) Vrh 2af toph 33810 Ie 3402) (22) (50) (1154d, 106) (0 (120) (103) 13 Ica cescoge ele ysa 437,94 A Current {{sogoop ® Ч32'я | Charging