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Questions: For circuit A5-1 below, solve for the total internal impedance (resistance and reactance) of each transformer 1) rTransformer AB: 12.4/225kV RAB1 6 XAB1 4 RAB2 20 XAB2 15 Transformer BC: 225/34.6kV RBC1 50 Хвсі 3 10 RBC2 0.1250 XBC2 0.250

Questions: For circuit A5-1 below, solve for the total internal impedance (resistance and reactance) of each transformer 1) referred to its primary side (ZAB, Zec) Write answer in phasor form. (4 marks) For circuit A5-1 below, given that the input voltage to transformer BC is 225 KVZ0°, and Z is 300Z15°, solve for %VR = 2NL-V2FL x 100% V2FL (3 marks) the voltage regulation of transformer BC for the connected load. For circuit A5-1 below, given that the input voltage to transformer AB is 12.4 KVZ0°, and Z is 300215° solve 2) for IA, IB, Ic. Solve for the apparent power S delivered to the load Z. Solve for the the power factor of the load. Solve for the apparent power S at the primary side of transformer AB. What is the efficiency of the system in delivering real power to the load? (7 marks 3) For circuit A5-1 below, given that the load is operating at 3 MVA, with a power factor of 0.9 lagging, and the voltage supplied to the load is 33.9KVZ0°, solve for Ia, Ig, Ic. Solve for the power delivered at the primary side of transformer AB, and power factor at the source. What is the efficiency of the system in delivering real power to the load? (6 marks) A5-1 (Note: Circuit is single phase.) le lc X BC2CZ XAB A XBC1 X AR2 IBl RAB1 RAB2 Rec1 RBC2
Transformer AB: 12.4/225kV RAB1 6 XAB1 4 RAB2 20 XAB2 15 Transformer BC: 225/34.6kV RBC1 50 Хвсі 3 10 RBC2 0.1250 XBC2 0.250
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ZAB f12-4 RAR2-- 12. t ABI X 22S 22 V 225 4t 0 046 7.23 34 え4045 ZBC 22S 22 S x Reezt 3C2 34.6 34.6 sii, 225 t 34.6 0.12 5+ 5YBC2 Rec AA iilr ViM22/o te Tranuforaing (Rec+ Rbca termad onpeememrimay a MN (o-125+ 0-11) (015 -) tj(2) 225/ -0.243 0-366/4

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