A balanced three-phase star-connected R-C load of 120 kW takes a current of 60 A with a line voltage of 1300 V, 50 Hz. Find the circuit constants of the load per phase. Impedance Power factor Resistance Xc
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- A balanced -connected impedance load with (12+j9) per phase is supplied by a balanced three-phase 60-Hz,208-V source, (a) Calculate the line current, the total real and reactive power absorbed by the load, the load power factor, and the apparent load power, (b) Sketch a phasor diagram showing the line currents, the line-to-line source voltages, and the -load currents. Use Vab as the reference.Consider a three-phase Y-connected source feeding a balanced- load. The phasor sum of the line currents as well as the neutral current are always zero. (a) True (b) FalseA 3-phase 4160 V Y-connected source is rated at 5 MVA. It is connected to a balanced 3-phase delta connected load with 300 A phase current at 0.8 p.f. Determine the impedance of the load, and the source line current and power factor seen by the source. What impedance can be added to the system to make the power factor = 1?
- For the network shown in the figure below: a. Find the total impedance Zt. b. Calculate the voltage V2 and the current IL . c. Find the power factor of the network and indicate whether it is leading or lagging. *A balanced three-phase star-connected R-C load of 140 kW takes a current of 72A with a line voltage of 1300 V , 50 Hz. Find the circuit constants of the load per phase. Impedance Power factor Resistance Xc cA balanced three-phase star-connected R-C load of 145 kW takes a current of 54 A with a line voltage of 900 V, 50 Hz. Find the circuit constants of the load per phase. Impedance, Power factor , Resistance
- Convert the wye-connected load to its delta equivalent. What is the per phase impedance of the delta equivalent load? What is the total real and total reactive power consumed by the three-phase load regardless if wye or delta?Given a balanced three-phase system - Δ-connected load with an impedance of 12 + j9 Ω/ϕ - Y-connected source - with an acb sequence - source voltage in the b-phase: 240∠-50⁰ - line impedance: 1 + j1 Ω/ϕ Determine the current in the a-phase of the load IaA Blank 1 A (rms) EXPRESS YOUR ANSWER IN POLAR FORMA 30-Ω resistor, a 15-Ω inductive reactance, and a 12-Ω capacitive reactance are connected in parallel across a 120-V 60-Hz line. Find (a) the phasor branch currents, (b) total current and phase angle, (c) impedance, and (d) power drawn by the circuit.
- A balanced star-connected source has phase voltage Vab = 416 ∠30o V and a positive phase sequence. If this is connected to a balanced delta-connected load, find the line and phase currents. Take the load impedance per phase as “D” Ω and line impedance per phase as “E” Ω.A balanced three-phase source having a line voltage of 208-Vrms is supplying two parallel-connected three-phase loads. The first load is a balanced delta of impedance 21 angle 30° ohms per phase and the second load is a balanced wye of impedance 9 angle -60° ohms per phase. Find the magnitude of the rms line current(in Amperes) and the total average power absorbed by the load(in kW).Having a phase impedance of 23.7 + j17.1 Ω at 50 Hz given in Figure Δ-connected load, Y-joint source resulting in 400 V and 50 Hz with impedance 0.1 + j0.3 Ω on each line fed by. According to this, a) Find the line flow and load voltage. b) Find the load-arm currents. c) There are active and protective forces produced by the source.