A power transformer has rated power of 100 KVA and rated primary voltage of 22 KV....
A power transformer has rated power of 100 KVA and rated primary voltage of 22 KV. The series impedance is given as 1 + 15% pu. Find the series impedance in ohms.
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A power transformer has rated power of 100 KVA and rated primary
voltage of 22 KV....
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
A three phase power transformer of 100 (KVA), 22 / 12.7 (kV) and Δ-Y has a...
A three phase power transformer of 100 (KVA), 22 / 12.7 (kV) and Δ-Y has a resistance of 0.15 (pu) and a reactance of 0.6 (pu). The elements of the excitation branch are R_m = 100 (pu) and X_m = 20 (pu) a) If this transformer supplies a load of 80 (KVA) with an FP = 0.8 delay, draw the phasor diagram of one phase of the transformer. b) What is the voltage regulation of the transformer bank in these...
A three-phase Yy0 connected transformer has a nominal rating of 250 kVA and a voltage ratio...
A three-phase Yy0 connected transformer has a nominal rating of 250 kVA and a voltage ratio 15:0.4 kV. After conducting the short-circuit test, where the secondary winding is short-circuited, it is found that the primary series resistance is 0.08 pu and the primary series impedance magnitude is 0.1pu. The effect of the parallel branch in the transformer’s equivalent circuit may be neglected. Explain what information ‘Yy0’ gives about the transformer. Draw the per-phase equivalent circuit of the transformer during the...
A 3 phase transformer bank is rated at 500 kVA and has a 34.5/11 kV voltage...
A 3 phase transformer bank is rated at 500 kVA and has a 34.5/11 kV voltage ratio. Find the following ratings of each individual transformer in the bank when the transformer is wye to Delta connected : High voltage, low voltage, turns ratio, and apparent power
three-phase transformer is rated at 12 kV/135 kV, 100 MVA. It has the following equivalent circuit...
three-phase transformer is rated at 12 kV/135 kV, 100 MVA. It has the following equivalent circuit parameters (referred to the primary winding where appropriate) : • primary resistance R1 = 0.03 ohms, secondary resistance R2’ = 0.04 ohms • primary leakage reactance X1 = 0.1 ohms, secondary leakage reactance X2’ = 0.1 ohms • magnetising reactance XM = 16 ohms, core-loss resistance RC = 200 ohms. In your calculations, you should use the simplified equivalent circuit. i) The transformer is...
A three-phase transformer bank is rated at 500 kVA and have a 34.5/12 kV voltage ratio....
A three-phase transformer bank is rated at 500 kVA and have a 34.5/12 kV voltage ratio. Find the following ratings of each individual transformer in the bank when the transformer is ∆-Y connected: high voltage, low voltage, turns ratio (a), and apparent power.
Q1 A single-phase 11/2.2 kV, 22 kVA transformer has the following parameters all referred to the HV side RI 0.4, X 0...
Q1 A single-phase 11/2.2 kV, 22 kVA transformer has the following parameters all referred to the HV side RI 0.4, X 0.602, R2 7.5 , X2 22 , Re 2500 , and Xm - 20002 The transformer is supplying 80% of its rated load at a power factor of 0.87 power factor lagging and at its rated voltage. Calculate (a) the efficiency of the transformer, (b) the power losses on the primary side (the copper loss and core loss), and...
0% 0 pts) A 100 kVA. I 3 8 2.4 kV step down transformer has the...
0% 0 pts) A 100 kVA. I 3 8 2.4 kV step down transformer has the following parameters (referred to the secondary): Rop-0.08 04m Tn the transformer is 100 ad KVA at 09 pf lagging at 2160 V. Find the voltage applied to the primary side of the transtormer Find the voltage regulation and efficiency 216D Q니 10.3-2400 1002 042to V(52 467 oo62 06 (10 pts) Solve the previous problem using the PU system. Use the rating of the transformer...
4. Figure shows a power source that feeds a 100 kVA 14/2.4 kV transformer through a...
4. Figure shows a power source that feeds a 100 kVA 14/2.4 kV transformer through a feeder with impedance of 100/60° Ω Load 90 kw 0.85 PF lagging Feeder transmission line) Source Transformer Load The transformer has been tested to determine its equivalent circuit. The results of the tests are: Open-circuit test Voc = 14 kV oc 0.1 A Рос-800 w Short-circuit test Vsc 800 V Isc = 7A Psc 2 kW The load on the transformer is 90 kW...
DOM power face mer has the livers 3.2 kW at rateu Selon Tum D4.10 A 50-KVA,...
DOM power face mer has the livers 3.2 kW at rateu Selon Tum D4.10 A 50-KVA, 2400/240-V, 60-Hz distribution transformer lowing resistances and leakage reactances in ohms referred to its ed to its own side. R1 = 3.5 R2 = 0.035 X1 = 5.7 X2 = 0.057 The subscript 1 denotes the primary or high-voltage winding and subscrinen denotes the secondary or low-voltage winding. a. Find the equivalent impedance Zel referred to the primary. b. Find the equivalent impedance Ze2...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
Q1 A single-phase 11/2.2 kV, 22 kVA transformer has the following parameters all referred to the HV side RI 0.4, X 0.602, R2 7.5 , X2 22 , Re 2500 , and Xm - 20002 The transformer is supplying 80% of its rated load at a power factor of 0.87 power factor lagging and at its rated voltage. Calculate (a) the efficiency of the transformer, (b) the power losses on the primary side (the copper loss and core loss), and...
0% 0 pts) A 100 kVA. I 3 8 2.4 kV step down transformer has the following parameters (referred to the secondary): Rop-0.08 04m Tn the transformer is 100 ad KVA at 09 pf lagging at 2160 V. Find the voltage applied to the primary side of the transtormer Find the voltage regulation and efficiency 216D Q니 10.3-2400 1002 042to V(52 467 oo62 06 (10 pts) Solve the previous problem using the PU system. Use the rating of the transformer...
4. Figure shows a power source that feeds a 100 kVA 14/2.4 kV transformer through a feeder with impedance of 100/60° Ω Load 90 kw 0.85 PF lagging Feeder transmission line) Source Transformer Load The transformer has been tested to determine its equivalent circuit. The results of the tests are: Open-circuit test Voc = 14 kV oc 0.1 A Рос-800 w Short-circuit test Vsc 800 V Isc = 7A Psc 2 kW The load on the transformer is 90 kW...
DOM power face mer has the livers 3.2 kW at rateu Selon Tum D4.10 A 50-KVA, 2400/240-V, 60-Hz distribution transformer lowing resistances and leakage reactances in ohms referred to its ed to its own side. R1 = 3.5 R2 = 0.035 X1 = 5.7 X2 = 0.057 The subscript 1 denotes the primary or high-voltage winding and subscrinen denotes the secondary or low-voltage winding. a. Find the equivalent impedance Zel referred to the primary. b. Find the equivalent impedance Ze2...
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