Three impedances of 5 + j 12, 8j7 and 3 - j12 ohms are connected in star to red, yellow and blue lines of a 5000 V, 3- phase, 4 - wire supply. The phase sequence is RYB. Calculate the line currents.
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- The line-to-line voltages of a three-phase, four-wire system are the following: Van = |Van| cis(-25); Vbn = |Vbn| cis(-120); and Vcn = |Vcn| cis(90) volts. Where: |Van| = (5/2) |Vcn|; |Vbn| = (5/3) |Vcn|. If |Vcn| = 437 volts, what is the magnitude of the positive sequence component of Vab in volts?The sequence component line-to-line voltages of a three-phase, 4-wire system are the following: Vab0 = 60cis(-60); Vab1 = 80cis(-12); and Vab2 = 120 cis(40) volts. What is the magnitude of Vbc in volts?The desired secondary voltage is 115 volts l, 3-phase, to monitor the voltage of 230 kV line and PT's are to be installed. The PT's are to connected delta-wye. What shall be the PT's voltage ratio?
- Three 1:10 transformers are connected delta-wye for stepping up the 2,300-volt three phase source. Calculate the secondary line voltage.A balanced twelve-phase star connected load has a phase voltage of magnitude 180 volts. What is the magnitude of the voltages between alternate lines (across every other line) of this load in volts?A balanced four-phase star connected load has a phase voltage of magnitude 150 volts. What is the magnitude of the line voltages of this load in volts?
- To monitor the voltage of a 230 kV line, PTs are to be installed. The PTs are to be connected delta-delta. The desired secondary voltage is 115 V, 3-phase. What shall be the PTs voltage ratio? *A balanced, three-phase, positive sequence, with grounded neutral source, supplies power to a balanced delta connected load. For the system, additional information are as follows: Vbn = 465 cis 175 degrees volts; and Ica = 13.7 cis117 degrees amperes What is the magnitude of the impedance per phase of the delta load in ohms?The line-to-line voltages of a three-phase, three-wire system are the following: Vab = |Vab| cis(0); Vbc = |Vbc| cis(-143.13); and Vca = |Vca| cis(90) volts. Where: |Vbc| = 1.25 |Vab|; |Vca| = 0.75 |Vab|. If |Vab| = 297 volts, what is the magnitude of the positive sequence component of Vab in volts?
- https://www.bartleby.com/questions-and-answers/q1a-3-phase-50hz-132-kv-overhead-transmission-lines-has-conductor-diameter-of-4-cm-each-are-arranged/7883abce-cbb7-466d-9f05-19d3a0520619A three-phase four-wire system has unbalanced connected loads that draws 7 amps from line A, 16 amps from line B, and 9 amps from line C. What is the current flowing in the neutral conductor?51. The Boot connection is used to transform from 400 volts three-phase to 118 volte two-phase. If the load ie 40 kva, calculate: (a) the current in the main and r primarion; (b) the current in the main and teaser secondarios; (4) the kilovolt- ampere rating of each of the transformers