![a) [10pts] Show/Mark all voltages and phase and line currents on the primary and the secondary sides of the three phase transformer shown below. b) [20pts] Find loads currents and voltages. 15:70 30 +j15 Ω 120 20 Vm](http://img.homeworklib.com/questions/430efb00-2f9d-11ec-be33-6beb7b0bfe14.png?x-oss-process=image/resize,w_560)
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a) [10pts] Show/Mark all voltages and phase and line currents on the primary and the secondary...
FIND E), F),G) A three-phase bridge rectifier is shown here. The secondary's phase voltages are: Van...
FIND E), F),G)
A three-phase bridge rectifier is shown here. The secondary's phase voltages are: Van (t) = Vm sin (wt), Vbn (t) = Vm sin (ot - 120°), and Ven (t) = Vm sin (ot - 240°), and the corresponding line-to-line voltages are: Vab = V3Vm sin(ot+30°), Vhc = V3Vm sin(ot - 90°), and Vca = V3Vm sin(ot - 210'), where Vm is the peak voltage. Plot the three phase voltages and the three line-to-line voltages. MATLAB is a...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting thre...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary windings of transfor Assume the transformer has a turns ratio of unity mer are Y-connected a) 3 PTI On the top of voltage plot on next page indicate the diodes that will be conducting during different intervals of time. b) 17 PT] Plot the...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the three-phase transformer rated at 120 kV and the secondary side rated at 13.8 kV. The rated power of the transformer bank is 20 MVA. One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a three-phase load of 15 MVA at 0.85 lagging power factor. Compute the following: a) The turns...
1. (25)- The circuit connection of primary and secondary windings of a three phase transformer is...
1. (25)- The circuit connection of primary and secondary windings of a three phase transformer is given below. Drawing the vector diagram of the voltages of the corresponding windings indicate the VECTOR GROUP of the given transformer. AMAZA mea, ambayo NB Blog beamet b ibeob amnioc anna anniche
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...
1. In order to meet an emergency, three single-phase transformers with 12.470/7.200 V are connected in...
1. In order to meet an emergency, three single-phase transformers with 12.470/7.200 V are connected in Delta-Wye to form a three-phase transformer which is fed by a 12.470 V transmission line. If the transformer supplies 60 MVA to a load, calculate: (3 marks) a. The turns ratio for each transformer b. The currents in the primary and secondary windings of the transformer c. The primary and secondary transmission line currents 2. A Wye-Delta transformer is connected to a 66 kV...
1. In a three-phase balanced wye-wye system, the source is an abc-positive sequence set of voltag...
1. In a three-phase balanced wye-wye system, the source is an abc-positive sequence set of voltages with Van- 120 20 Vrms. The per phase impedance of the load is 5 +j62. If the line impedance per phase is 0 Ω, find the line currents, the line to line voltages at the source, and the line to line voltages at the load 120 20 Vms 2. In a three-phase balanced wye-wye system, the source is an abc-sequence set of voltages with...
Note Unless otherwise specified, three phase systems are rated in terms of their line-to-line rms voltages So, for instance, a three-phase 230 kV transmission line has an rms phase voltage of 230/V3...
Note Unless otherwise specified, three phase systems are rated in terms of their line-to-line rms voltages So, for instance, a three-phase 230 kV transmission line has an rms phase voltage of 230/V3 kV. If you encounter a three-phase system specified with two voltages, e.g., 480/277 V, that implies that the line-to-line rms voltage is 480 V and the rms phase voltage is 277 v. Problem 8 The line-to-line voltage of a three-phase transmission line is Vbc-120 2.20° kV. Suppose the...
Fig Qshows the one-line diagram of a three-phase power system. As shown in Fig. Q3. the...
Fig Qshows the one-line diagram of a three-phase power system.
As shown in Fig. Q3. the two zones are connected by a 400 MVA,
240-kV/24-kV, Ý-A three phase transformer. The Y-A three phase
transfonmer has an equivalent series impedance of ZTH - 1.2 + j1.6n
per phase referred to the high voltage side (primary side). The
three-phase power system can be studied with per unit quantities
using base values of S-500 MVA and 240 kV in zone 1.
By using...
FIND E), F),G)
A three-phase bridge rectifier is shown here. The secondary's phase voltages are: Van (t) = Vm sin (wt), Vbn (t) = Vm sin (ot - 120°), and Ven (t) = Vm sin (ot - 240°), and the corresponding line-to-line voltages are: Vab = V3Vm sin(ot+30°), Vhc = V3Vm sin(ot - 90°), and Vca = V3Vm sin(ot - 210'), where Vm is the peak voltage. Plot the three phase voltages and the three line-to-line voltages. MATLAB is a...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary windings of transfor Assume the transformer has a turns ratio of unity mer are Y-connected a) 3 PTI On the top of voltage plot on next page indicate the diodes that will be conducting during different intervals of time. b) 17 PT] Plot the...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the three-phase transformer rated at 120 kV and the secondary side rated at 13.8 kV. The rated power of the transformer bank is 20 MVA. One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a three-phase load of 15 MVA at 0.85 lagging power factor. Compute the following: a) The turns...
1. (25)- The circuit connection of primary and secondary windings of a three phase transformer is given below. Drawing the vector diagram of the voltages of the corresponding windings indicate the VECTOR GROUP of the given transformer. AMAZA mea, ambayo NB Blog beamet b ibeob amnioc anna anniche
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...
1. In order to meet an emergency, three single-phase transformers with 12.470/7.200 V are connected in Delta-Wye to form a three-phase transformer which is fed by a 12.470 V transmission line. If the transformer supplies 60 MVA to a load, calculate: (3 marks) a. The turns ratio for each transformer b. The currents in the primary and secondary windings of the transformer c. The primary and secondary transmission line currents 2. A Wye-Delta transformer is connected to a 66 kV...
1. In a three-phase balanced wye-wye system, the source is an abc-positive sequence set of voltages with Van- 120 20 Vrms. The per phase impedance of the load is 5 +j62. If the line impedance per phase is 0 Ω, find the line currents, the line to line voltages at the source, and the line to line voltages at the load 120 20 Vms 2. In a three-phase balanced wye-wye system, the source is an abc-sequence set of voltages with...
Note Unless otherwise specified, three phase systems are rated in terms of their line-to-line rms voltages So, for instance, a three-phase 230 kV transmission line has an rms phase voltage of 230/V3 kV. If you encounter a three-phase system specified with two voltages, e.g., 480/277 V, that implies that the line-to-line rms voltage is 480 V and the rms phase voltage is 277 v. Problem 8 The line-to-line voltage of a three-phase transmission line is Vbc-120 2.20° kV. Suppose the...
Fig Qshows the one-line diagram of a three-phase power system.
As shown in Fig. Q3. the two zones are connected by a 400 MVA,
240-kV/24-kV, Ý-A three phase transformer. The Y-A three phase
transfonmer has an equivalent series impedance of ZTH - 1.2 + j1.6n
per phase referred to the high voltage side (primary side). The
three-phase power system can be studied with per unit quantities
using base values of S-500 MVA and 240 kV in zone 1.
By using...
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