bads: Load 1: 18 kVA at 0.8 pf lagging Load 2: 10 kW at 0.6 pf leading Load 3: unknown If the line voltage at the loads is 208 V ms, the line current at the source is 116.39 A rms, and the combined power factor at the load is 0.86 lagging, find the unknown load.
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- A balanced three-phase source furnishes power to the following three loads:Load 1: 6 kVA at 0.83 pf laggingLoad 2: unknownLoad 3: 8 kW at 0.7071 pf leadingIf the line current is 84.6 A rms, the line voltage at the load is 208 V rms, and the combined load has a0.8 pf lagging, determine the unknown load.A balanced three-phase source furnishes power to the following three loads:Load 1: 6 kVA at 0.83 power factor laggingLoad 2: unknownLoad 3: 8 kW at 0.7071 power factor leadingIf the line current is 84.6 A rms, the line voltage at the load is 208 V rms, and the combined loadhas a 0.8 power factor lagging, determine the unknown load.In 3 phase 11kVV generator having unity power factor of 100MW load and the sending and receiving end voltage is 11KV and the value of the impedance is j0.242. What isthe value of the reactive power delivered by the capacitor.
- 2. A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120-Vrms sinusoidal source. Calculate: (a) the average and reactive powers delivered to the load, and (b) the peak current.A three-phase line has an impedance of 0.1+j0.8 Ω/ϕ. The line feeds two balanced three-phase loads connected in parallel. The first load is absorbing a total of 630 kW and absorbing 840 kVAR magnetizing vars. The second load is Y-connected and has an impedance of 15.36−j4.48 Ω/ϕ. The line-to-neutral voltage at the load end of the line is 4000 V. What is the magnitude of the line voltage at the source end of the line?A balanced three-phase 60Hz abc systems feeds two delta connected loads in parallel. Load 1 draws 40 kVA (Apparent Power) at a lag pf of 0.8, while load 2 absorbs 24 kW (average power) at a lag pf of 0.9. The line-to-line voltage at the loads, between phase A and B, is VAB = 440 angle 30 V rms. Find: a) The phase current IAB1 for load 1. b) The power factor of the combined loads. Thank you for your assistance.
- A balanced delta connected load of "14+j19" 2- per phase is connected at the end of a three-phase line. The line impedance is "6+18j" 2- per phase. The line is supplied from a three-phase source with a line-to-line voltage of 207.85 Vrms. Taking phase "a" voltage Va as reference, determine the following: (a) Current in phase a. (b) Total complex power supplied from the source. (c) Magnitude of the line-to-line voltage at the load terminal.A Δ-connected source supplies power to a Y-connected load in a three-phase balanced system. Given that the line impedance is 3 + j2 Ω per phase while the load impedance is 5 + j1 Ω per phase, what is the magnitude of the line current. Assume the source phase voltage Vab = 220 ∠0° V rms and what is the magnitude of the voltage in the load (5+j1) ohms.Three symmetrical three-phase loads are connected in parallel. Load 1 is connected in Y with an impedance of 400 + j300Ω / φ, load 2 is connected in with with an impedance of 2400 - j1800Ω / φ and load 3 is evaluated at 172.8 + j2203.2 kVA. Loads are supplied from a distribution line with an impedance of 2 + j16Ω / φ. Size of the voltage between the line and the neutral conductor at the end of the charge the line is 24√3 kV. The operating frequency is 50 Hz.(a) Calculate the line currents and the phase currents of the loads.(b) Calculate the total complex power at the receiving end of the system.(c) Calculate the total complex power at the transmitting end of the line.(d) Calculate the values of the compensation capacitors which are connected from the line to the neuron at the load end of the system so that the power factor at the load end reaches pf ≥ 0.98.(e) What if the capacitors are connected from one line to another? What would be the best choice for compensation, the…
- A 3-phase Y-connected load draws power from a 3-phase Y-connected source. The source voltage, ?=440∠0º?_rms and the load impedance, Z_y=(30+j15) Ω. The line impedance, Z_line= (1+j1)Ω and the system operates at 60 Hz. a) Draw the single-phase equivalent circuit and label all given quantities numerically. b) Calculatethe rms line (phase) current phasor in each phase. c) Calculate the total active or real power supplied by the source. d) Calculate the total active or real power consumed by the load. e) Calculate the total line loss i.e. the total activepower lost due to line. f) Determine the power efficiency of the system.Two balanced three-phase loads that are connected in parallel are fed by a three-phase line having a series impedance of (0.4j2.7) per phase. One of the loads absorbs 560 kVA at 0.707 power factor lagging, and the other 132 kW at unity power factor. The line-to-line voltage at the load end of the line is 2203V. Compute (a) the line-to-line voltage at the source end of the line. (b) the total real and reactive power losses in the three-phase line, and (c) the total three-phase real and reactive power supplied at the sending end of the line. Check that the total three-phase complex power delivered by the source equals the total three-phase comp lex power absorbed by the line and loads.A three-phase line with an impedance of (0.2+j1.0)/ phase feeds three balanced three-phase loads connected in parallel. Load 1: Absorbs a total of 150 kW and 120 kvar. Load 2: Delta connected with an impedance of (150j48)/phase. Load 3: 120 kVA at 0.6 PF leading. If the line-to-neutral voltage at the load end of the line is 2000 v (rms), determine the magnitude of the line-to-line voltage at the source end of the line.