Gen A British electric company would like to connect two substations of Manchester and London by a 230 transmission line. This transmission line has two sections as follow: 1) Manchester to Oxford with 220 length and towers type A. 2) Oxford to London with 70 length and towers type B. The conductors of whole line are triple bundle as shown in Figure Determine the efficiency of whole transmission line if the load in London substation is 800MVA with 0.9 lagging power factor. All line resistances are R-0.03 1d and the frequency of network is 50 Manchester 220km Oxford 70 Am London Manchester Oxford London JOH + 16 m 16m 8m 8m d=35.36 cm r = 1.284cm Conduce Tower :Type A Used in Manchester - Oxford Line Tower: Type B Used in Oxford - London Line Conductor coordination