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Two balanced three-phase loads that are connected in parallel are fed by a three-phase line having a series impedance of
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Chapter 2 Solutions
Power System Analysis and Design (MindTap Course List)
- Solve the question from point 4 to point 11arrow_forwardObtain the equivalent circuit of a 200/400 V, 50 Hz, single-phase transformcr from the following test data: O.C. test : 200 V, 0-7 A, 70 W .. on L.V. side S.C. test : 15 V, 10 A, 85 W Calculate the secondary voltage when delivering S kW at 08 p.f. lagging, the primary voltage being . on H.V. side 200 V. (R, = 57-14 Q ; X, = 330 2; R = 0-21 Q ; Xg, = 0-31 Q ; 3778 V)arrow_forwardPlease answer quickly "In series-connected ac circuit, the total voltage across the circuit is always equal to the sum of the magnitude (only) of the individual voltage across each element." True False The power factor is equal to cosine of the phase difference. True False A leading power factor means that the circuit is predominantly capacitive in nature. True False "Since most loads are resistive in nature (e.g. motors), improvement of power factor is done by connecting capacitor banks or a synchronous condenser " True Falsearrow_forward
- Two delta connected loads are connected in parallel and powered by a balanced Y-connectedsource. The smaller of two loads draws 10 kVA at a lagging power factor of 0.75 and the largerdraws 25 kVA at a leading power factor of 0.8. The line voltage is 400 V. Calculate a) The powerfactor at which the source is operating. b) The total power drawn by the two loads. c) The phasecurrent of each load.arrow_forwardThe standard unit of power factor of a 3-phase ac circuit is degrees. Select one: True Falsearrow_forwardCOURSE: Electrical EngineeringSUBJECT: Electrical ApparatusINSTRUCTIONS:• Write the GIVEN with their respective symbols and units.• Do not skip the SOLUTIONS, do it step-by-step with their respective symbols and units• Round up to 3 three decimal places the FINAL ANSWERS and BOX it. PROBLEM: A source delivers 50 kVA to a load with a power factor of 65 percent lagging. Find the load’s average and reactive powers.arrow_forward
- 1.arrow_forwardq1 B g6= 9 g7 = 8arrow_forwardThree different loads are connected in parallel across a 1000-volts (rms) single-phase source. Load 1: Inductive load, 120 kVA, 0.25 pf laggingB Load 2: Capacitive load, 11 kw, 41 KVAR; Load 3: Resistive load, 16 kW. (a) Determine the total reàl, reactive, and complex power. (b) Determine the supply power factor. (c) In order to improve the power factor to 0.8 lagging, a capacitor with negligible resistance is connected in parallel with three loads. Find the kVAr rating of that capacitor.arrow_forward
- The three-phase power and line-line ratings of the electric power system shown in Figure-1 are given below: G,:(first and Last digit of SAP ID) MVA T:(G,rating-10) MVA T(G,rating-10) MVA M:((T,rating-10)) MVA 30 kV X=10% 30/300 kV X=11% 300/30 kV X=11% 25 kV X=9% Line: 30 kV Z=First two digits of SAP ID + j (2× first two digits of SAP ID) T1 T2 Vm Line 2 G M Figure 1 • Apply the knowledge of per unit system on above network and draw an impedance diagram showing all impedances in per unit when S, = 100 MVA and V, = 30 kVarrow_forwardTwo parallel connected loads A and B are supplied by a 440 V line to line, 3-phase, 60 Hz generator. Load A draws an apparent power of 100 kVA at 0.80 pf lagging and load B draws an apparent power of 70 kVA at unity pf. Determine the line current supplied by the source.arrow_forward120 kV Fig. 1 ۸ جمعت حمت Z= 6 + j8 92 110 kV Balanced 3-phase loadarrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
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