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5. A 3-phase line 3 km long delivers 3000 kW at a p.f: 0-8 lagging to a load. The resistance and reactance per km of each conductor are 0-4 Q and 0-3 Q respectively: Ifthe voltage at the supply end is maintained at ]l kV; calculate receiving end voltage (line-to-line) line current (iii) transmission eftficiency: I() 10.46 kV (i) 207 A (iid) 95%] A short 3-0 transmission line with an impedance of(5+j20) Q per phase has sending end and receiving end voltages of 46-85 kV and 33 kV respectively for some receiving end load at pfof 0.8 lagging: Determine power output (ii) sending end power factor [() 22+86 kW (i) 0657 lag] A substation receives 6000 kVA at 6 kV; 0.8 p.f. lagging o low voltage side of transforer from generating station through 3-phase cable system having resistance of Q and reactance of 2 Q per phase_ Identical 6600/33000 V transformers are installed at each end, 6600 V side being delta connected and 33000 V side star connected_ The resistance and reactance of each transforer are Q and respectively; refered t0 h.v side_ Calculate the voltage = at the generating station bus bars [6778 V] A shont 3-phase transmission line connected t0 33kV, 50 Hz generating station at the sending ' end is required t0 supply load of 10 MW at 0-8 lagging power factor at 30 kV at the receiving end. If the minimum transmission efficiency is to be limited to 96% estimate the per phase value of resistance and inductance of the line. 1240; 0-028 H] A single phase transmission line is delivering 5O0 kVA load at 2 kV Its resistance is 0- 2 Q and inductive reactance is 0-4 Q. Determine the voltage regulation if the load power factor is (i) 0 707 lagging (ii) 0-707 leading: [() 53% (ii) -1-65%)

          5. A 3-phase line 3 km long delivers 3000 kW at a p.f: 0-8 lagging to a load. The resistance and reactance per km of each conductor are 0-4 Q and 0-3 Q respectively: Ifthe voltage at the supply end is maintained at ]l kV; calculate receiving end voltage (line-to-line) line current (iii) transmission eftficiency: I() 10.46 kV (i) 207 A (iid) 95%] A short 3-0 transmission line with an impedance of(5+j20) Q per phase has sending end and receiving end voltages of 46-85 kV and 33 kV respectively for some receiving end load at pfof 0.8 lagging: Determine power output (ii) sending end power factor [() 22+86 kW (i) 0657 lag] A substation receives 6000 kVA at 6 kV; 0.8 p.f. lagging o low voltage side of transforer from generating station through 3-phase cable system having resistance of Q and reactance of 2 Q per phase_ Identical 6600/33000 V transformers are installed at each end, 6600 V side being delta connected and 33000 V side star connected_ The resistance and reactance of each transforer are Q and respectively; refered t0 h.v side_ Calculate the voltage = at the generating station bus bars [6778 V] A shont 3-phase transmission line connected t0 33kV, 50 Hz generating station at the sending ' end is required t0 supply load of 10 MW at 0-8 lagging power factor at 30 kV at the receiving end. If the minimum transmission efficiency is to be limited to 96% estimate the per phase value of resistance and inductance of the line. 1240; 0-028 H] A single phase transmission line is delivering 5O0 kVA load at 2 kV Its resistance is 0- 2 Q and inductive reactance is 0-4 Q. Determine the voltage regulation if the load power factor is (i) 0 707 lagging (ii) 0-707 leading: [() 53% (ii) -1-65%)

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