
Basic Engineering Circuit Analysis
11th Edition
ISBN: 9781118539293
Author: J. David Irwin, R. Mark Nelms
Publisher: WILEY
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5.
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are
connected in wye-delta on a 12470 V, 3-phase line. If the load is 450 kVA, calculate the following
currents:
(1) In the incoming and outgoing transmission lines
(2) In the primary and secondary windings
(3) If this transformer is used to raise the voltage of a 3-phase, 600 V line to 7.2 kV. (a) How
must they be connected? (b) Calculate the line currents for a 600 kVA load. (c) Calculate the
corresponding primary and secondary currents.
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please answer handwritten not chatgbt
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- Don't use ai to answer I will report you answerarrow_forwardThe power values of the loads in the circuit given in the figure are given below. Accordingly, which of the following is the RMS value of the Vs voltage amplitude? Load 1 (L1): the power factor is 1 and draws 13 kW of power,Load 2 (L2): draws 1 kVA at a forward power factor of 0.6,Load 3 (L3): draws 4 kW of average power and gives 3 kVAR of reactive power.arrow_forwardThe values of the elements in the circuit given in the figure are given below. Find the average power value on the R2 resistor. (Hint: First find the current of the R2 resistor with the loop current method. Four mutual inductance effect expressions should be added to each of the two loop equations.) Vs=238 voltsR1=13 ohmsR2=15 ohmsarrow_forward
- Don't use ai to answer I will report you answerarrow_forwardA transformer bank is composed of three single-phase transformers of10kVA, 20kV/200V; copper losses are 100 W and core lossesthey are 50 W. The bank is connected in Delta on the high voltage side and in star on the sidethe low-voltage side. A. What are the values of voltages B.What are the values of currents C. losses in the core and losses in copper. D. nominal power of the transformer bank.Solve by one of the experts, not using artificial intelligencearrow_forwardA 50 kVA, 13800/208 V transformer connected in Dy has an Rcc of 1% and aXcc of 7% per unit. A. What is the voltage regulation at full load and fp 0.8 in delay using the values of theimpedance (Ω).b. What is the voltage regulation under the same conditions using the system per unit Solve by one of the experts, not using artificial inteliggencearrow_forward
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