220-V, 3- φ voltage is applied to a balanced delta-connected 3- φ load of phase impedance (15 + j20) Ω. Find the line voltage in volts
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A 220-V, 3- φ voltage is applied to a balanced delta-connected 3- φ load of phase impedance (15 + j20) Ω. Find the line voltage in volts
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- Draw Wye- Delta three phase transformers connection ( no-load and full-load) in Lt-spiceTwo delta connected loads are connected in parallel and powered by a balanced Y-connectedsource. The smaller of two loads draws 10 kVA at a lagging power factor of 0.75 and the largerdraws 25 kVA at a leading power factor of 0.8. The line voltage is 400 V. Calculate a) The powerfactor at which the source is operating. b) The total power drawn by the two loads. c) The phasecurrent of each load.1. The following are the given for the circuit below: VRY = 220 cis 0°, VYB = 220 cis -120° and VBR = 220 cis -240°. IR = 10 cis 0°. The load is balanced and delta connected. Determine the: (a) Impedance per phase (b) Current per phase (c) Line currents. B R reellle relllle momm Y RY Iy IB ĪR B R ZBR VYB ZRY
- In a balanced delta connected 3-phase circuit, has resistance 25 ohm and inductive reactance 40 ohm, connected to a 400V,50HZ 3-phase supply voltage, then total power delivered to load is Select one: a. 5397.76W b. 1635.34KW c. 7593.26W d. NONE OF THESEI need to know how to get the last three parts of this problem. A line voltage of 208 V is connected to a balanced three-phase delta-connected inductive load consisting of a phase resistance of 8 ohms in series with an inductive reactance of 6 ohms. Determine the phase impedance, the circute power factor, the load phase voltage, the phase current, the line current, the total power consumed and the kilovoltampere input.A Factory is supplied froma 3-phase, 4-wire, 400 V, simmetrical system. The resistance of each line is 0.4 Ωand of the neutral 0.6 Ω. The power input to the main is as follows: 10 KVA at a laggin poer factor ofd 0.7 to phase R, 10 KVA at a leading power factor of 0.7 to phase S, and 10 KVA at unity power factor to phase T. Calculate the current in the neutral wire and the voltaje between line R and the neutral at the Factory. Phase secuence RST.
- 1. A wye-connected-load and a delta connected load are supplied by a four-wire 400 V three-phase, 50 Hz system. The connection for the wye loads are 2/20° ohms at line a, 30/50°V to line c and 6/75° ohms to line b. the connections for the delta loadare 50/30° ohms between lines a and b, 25/-60° ohms between lines b and c, and 17.3/90° ohms between lines a and c. Find the current on line b. 2. A wattmeter reads 5,540 W when the current coil is connected in phase a and the voltage coil is connected between the neutral and phase a of a balanced 3-phase system supplying a balanced load of 30 A at 400 V. What will be the reading of the instrument if the connections to the current coil remain unchanged and the voltage coil is connected between phase b and c? Take a-b-c phase sequence.In the circuit in the figure; L1 load draws 15 kVA with lagging power factor 0.6. The L2 load draws 6 kVA with a leading power factor of 0.8. According to this; What is the value of the complex power for the L2 load?A balanced purely resistive delta load has a phase voltage of 208 v and line current of 24.65 A. What is the total real power of this load in kW?
- 5. The figure below shows two star connected loads with three phase power. The voltage source is 120Z0°. The loads are Z₁ = 10 + j4 № and Z₂ = 2 +j3 №. The cables are negligible. Calculate: a) the line and phase current. b) the real power from the source. c) the reactive power of the circuit. Is V N Z₁ Z₁ Z₁ Z₂ Z₂ N N Z₂In Figure 1, the 3-phase source has a line-to-line voltage of 440 volts. The details of the impedances are the following: Z₁ = 36-j15; Z₂ = 40 + 130 0; Z₂ = 45+j600; Z4 = 75 + j0; Z5 = 50+j50 ; Z6 = 20+ j48. Determine the following: (a) Line currents: labi, and I (c) Line currents: lar Ibr, and ICT; (b) Line currents: Iaz, Ibz, and Iczi (d) PT, QT, ST, and pfr for the system; (e) W, and W, readings for 2-wattmeter method at lines a and b. Balanced 3-Phase ab-bc-ca source CH Figure 1 →laT -Ibr -ICT 1 lal ²3 1 Ibl 1 Ici →la2 lb2 →1c2 25 1²₂ ONDThe one-line diagram of a three-phase power system is shown in the above figure. The line impedances are in per- unit on a 100-MVA base, and the line admittances are neglected. ' qu V = 1.05200 0.01+ j0.025 300 + j200 MVA 3 0.015 + j0.035 150 MW 200 + j150 MVA 0.01 + j0.03 |V = 1.03 The admittance matrix (Y_bus)? The bus power in per-unit?