A three-phase generator connected in a star generates a phase voltage of Vθ = 2500 Vrms...
A three-phase generator connected in a star generates a phase voltage of Vθ = 2500 Vrms and supplies a delta-connected three-phase load. The three phases of the generator feed 3 equal charges each composed of R = 10 Ω, XC = 4Ω and XL = 10Ω.
a) Calculate the phase, line and load currents
b) Calculate the phase, line and load voltages
c) Calculate the powers of Apparent (S), Real (P) and Reactive (Q)
delivered by the generator
d) Calculate the power factor in each load and the power factor of
the entire system
e) Draw the phasor diagram that shows the "power triangle"
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A three-phase generator connected in a star generates a phase
voltage of Vθ = 2500 Vrms...
A three-phase generator connected in a star generates a phase voltage of Vθ = 24 KVrms and supplies a three-phase transformer connected in star. The transformation ratio is 115: 1. Each of the three c...
A three-phase generator connected in a star generates a phase voltage of Vθ = 24 KVrms and supplies a three-phase transformer connected in star. The transformation ratio is 115: 1. Each of the three coils of the secondary transformer feed 3 equal charges each composed of them by R = 18Ω, XC = 2Ω and XL = 20Ω. a) Calculate the phase, line and charge currents after the b) Calculate the phase, line and load voltages c) Calculate the Apparent...
A three-phase generator connected in star generates a phase voltage of Vθ = 220 Vrms and supplies a three-phase load also connected in star. The three phases of the generator are connected to the thre...
A three-phase generator connected in star generates a phase
voltage of Vθ = 220 Vrms and supplies a three-phase load also
connected in star. The three phases of the generator are connected
to the three loads shown Remember that the return of the current of
each charge is through the Neutral.
a) Calculate the phase, line, load and neutral currents
b) Calculate the phase, line and load voltages
c) Calculate the powers of Apparent (S), Real (P) and Reactive (Q)...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load through short feeder. seree the load line to neutral voltage as reference voltage phase angle zero. 02.1 Q2.2 Q2.3 Q2.4 Draw the equivalent circuit. 10p Calculate the load line-to-neutral voltages and line-to-line voltages. 20p Calculate the delta load currents and feeder currents. 20p Calculate the supply wye connected generator line-to-neutral voltages. Is the obtained values are acceptable? Calculate the generator real and reactive power...
b) The load connected to a three-phase supply comprises three similar coils connected in star. If...
b) The load connected to a three-phase supply comprises three similar coils connected in star. If the phase currents are 10A and the total active power and power factor absorb by the loads are 3kW and 0.8 lagging, respectively. Find: i. The magnitude of phase and line voltages (4 marks) ii. Total apparent power (1 mark) iii. The impedance of each coil. (2 marks) c) If the coil in Q3(b) are now connected in delta to the same three-phase supply,...
Q3 (3 marks) (4 marks) Two wattmeters are connected in the a and b phases, with...
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A 3-phase Y-connected motor is connected to a three phase Y-connected source with 440V line voltage. It draws a line current of 5A from the source. If the power factor of the motor is 0.8, calculate Active power and Reactive power absorbed by the load Total Apparent power
Q1.A balanced 3-Phase Y-connected generator with positive sequence has an impedance of 0.2 + 0.5j ф...
Q1.A balanced 3-Phase Y-connected generator with positive sequence has an impedance of 0.2 + 0.5j ф and an intemal voltage of 120 V/d. The generator feeds a balanced 3- Phase Y-connected load having an impedance of 39 + 28j Ωφ. The impedance of the line connecting the generator to the load is 0.8 + 1Sj Ωφ. The a-phase internal voltage of the generator is specified as the reference phasor a) Construct the a-phase equivalent circuit of the system b) Calculate...
A balanced A-connected load of Z,=12+39.0 12 is connected to a power supply via a transmission...
A balanced A-connected load of Z,=12+39.0 12 is connected to a power supply via a transmission line with impedance of Zrl=0.6+j2.5 12, find Transmission Lines o 20820 V AC 2084(0–240°) v umaza 10 AC 2084(0-120°) v mm | za | Three-Phase 208 V, 60 HZ Power Supply Three-Phase A-Connected Balanced Load @@OGO E the load line and phase voltages (magnitude and angle), the load line and phase currents (magnitude and angle), the total load's real, reactive, and apparent powers, the...
A three-phase 400V, star-connected motor has an output of 50kW, with an efficiency of 90 per...
A three-phase 400V, star-connected motor has an output of 50kW, with an efficiency of 90 per cent and a power factor of 0.85. Calculate the line current. Sketch a phasor diagram showing the voltages and the currents. If the motor windings were connected in mesh (delta), What would be the correct voltage of a three-phase supply suitable for the motor?
A three-phase generator connected in star generates a phase
voltage of Vθ = 220 Vrms and supplies a three-phase load also
connected in star. The three phases of the generator are connected
to the three loads shown Remember that the return of the current of
each charge is through the Neutral.
a) Calculate the phase, line, load and neutral currents
b) Calculate the phase, line and load voltages
c) Calculate the powers of Apparent (S), Real (P) and Reactive (Q)...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load through short feeder. seree the load line to neutral voltage as reference voltage phase angle zero. 02.1 Q2.2 Q2.3 Q2.4 Draw the equivalent circuit. 10p Calculate the load line-to-neutral voltages and line-to-line voltages. 20p Calculate the delta load currents and feeder currents. 20p Calculate the supply wye connected generator line-to-neutral voltages. Is the obtained values are acceptable? Calculate the generator real and reactive power...
b) The load connected to a three-phase supply comprises three similar coils connected in star. If the phase currents are 10A and the total active power and power factor absorb by the loads are 3kW and 0.8 lagging, respectively. Find: i. The magnitude of phase and line voltages (4 marks) ii. Total apparent power (1 mark) iii. The impedance of each coil. (2 marks) c) If the coil in Q3(b) are now connected in delta to the same three-phase supply,...
Q3 (3 marks) (4 marks) Two wattmeters are connected in the a and b phases, with the ends of the voltage coils connected in the c phase, of a balanced three phase star- connected lagging load. Draw a circuit diagram showing the three phases, the wattmeters and the load. Draw a phasor diagram of the phase voltages and currents, the voltages across the wattmeter voltage coils, and the angles between the wattmeter voltages and currents. Show that the sum of...
Problem 2:Three phase droult (42 pts) A three-phase wye connected generator ﹃plies two paral el loads through a feeder. tad is matalaeeday connected load and load 2 is a balanced delta connected loed. System data: Generator: Rating S-5oo MVA; Line Voltage: Veu-25KV; Feeder impedance: 7-(0.08 jo 62) O/mile, length-8 miles Generator reactance Xe- 1108: P.-75MW pf c-o.78 (all the power factors are lagging) (a) Draw the one-line diagram and a three-phase equivalent circuit (8pts) (b) Calculate the generator and feeder...
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A balanced A-connected load of Z,=12+39.0 12 is connected to a power supply via a transmission line with impedance of Zrl=0.6+j2.5 12, find Transmission Lines o 20820 V AC 2084(0–240°) v umaza 10 AC 2084(0-120°) v mm | za | Three-Phase 208 V, 60 HZ Power Supply Three-Phase A-Connected Balanced Load @@OGO E the load line and phase voltages (magnitude and angle), the load line and phase currents (magnitude and angle), the total load's real, reactive, and apparent powers, the...
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