Three loads with impedances j5 ohms, 10 ohms and-110 ohms are connected in Star with no...

   

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Three loads with impedances j5 ohms, 10 ohms and-110 ohms are connected in Star with no neutral (isolated or ungrounded star). Assume a balanced positive sequence for the source voltages with phase voltage of 120 V connected in star. Take the source impedance and line impedance to be 0.4+10.3 ohm per phase and 0.6+ 10.7 ohm per phase, respectively. Determine the L Show the circuit connection and obtain the line currents and load terminal voltages (4) Power generated by the supply and consumed by each load. Show that the power balance equation is satisfied i.e. power generated power loss and power demand. [3] Draw the phasor diagram for the load side i.e. show load currents and voltages only. (2) B) The ideal transformer circuit in Figure 3b is supply the 10 ohm resistor. 2012 111. 12020 V h 2:1 30 D 4 ww 102 Figure 3b Determine the mesh currents and the transformer terminal voltages indicated in Figure 3b. [6] Three loads with impedances j5 ohms, 10 ohms and-110 ohms are connected in Star with no neutral (isolated or ungrounded star). Assume a balanced positive sequence for the source voltages with phase voltage of 120 V connected in star. Take the source impedance and line impedance to be 0.4+10.3 ohm per phase and 0.6+ 10.7 ohm per phase, respectively. Determine the L Show the circuit connection and obtain the line currents and load terminal voltages (4) Power generated by the supply and consumed by each load. Show that the power balance equation is satisfied i.e. power generated power loss and power demand. [3] Draw the phasor diagram for the load side i.e. show load currents and voltages only. (2) B) The ideal transformer circuit in Figure 3b is supply the 10 ohm resistor. 2012 111. 12020 V h 2:1 30 D 4 ww 102 Figure 3b Determine the mesh currents and the transformer terminal voltages indicated in Figure 3b. [6]

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