8.5 A balanced wye-connected load of (4 + j3) Q2 is connected across a three-phase source of 173 V (line-to-line). a. Find the transmission line current. b. Find the power factor, the complex power, the real power, and the reactive power of the load. c. With Vab as the reference, sketch the phasor diagram that shows all voltages and currents.
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- Example: A balanced positive-sequence wye-connected 60 Hz three-phase source has line-to- line voltages of V,=1000 V. This source is connected to a balanced wye-connected load. Each phase of the load consists of a 0.2 H inductance in series with a 100 0 resistance. Find the line-to-neutral voltages, the line currents, the power, and the reactive power delivered to the load. Assume that the phase of Van is zero.Two impedances Z₁ and Z2 are connected in series to a voltage source with voltage Vs volts. Let V₁ be the voltage across Z₁ and V₂ be the voltage across Z2. Then, the total voltage Vs is divided between V₁ and V2 in proportion to impedance values Z₁ and Z2. O a. True O b. FalsePower factor is leading if a. load absorbing reactive power Ob. load is inductive C. voltage lags current d. voltage leads current Clear my choice
- 2. A single-phase a.c. distributor AB is fed from end A and has a total impedance of (0-2 +j03) ohm. At the far end, the voltage VR = 240 V and the current is 100 A at a p.f. of 0-8 lagging. At the mid-point M, a current of 100 A is tapped at a p.f. of 0-6 lagging with reference to the voltage Vy at the mid-point. Calculate the supply voltage V and phase angle between V and Vg- [292 V, 2-6°] T 40 AExplain current divider rule in ac circuits with two parallel impedances Z1 and Z2. Calculate the currents I1 and I2 in phasor form for the circuit given in figure.A single-phase a.c. distrībutor AB is fed from end A and has a total impedance of (0-2+j03) ohm. Atthe far end, the voltage V = 240 V and the current is 100 A at a p.f. of 0-8 lagging. At the mid-point M, a current of 100 A is tapped at a p.f of 06 lagging with reference to the voltage Vy at the mid-point. Calculate the supply voltage V, and phase angle between V, and Vg- [292 V, 2-6°)
- Need asap pls help. Solve for the voltages across and currents through each component. Show the complete solution and explain. The total power should be zero..15 A of current is taken by a non-inductive load at 125 V. In order that the same current shall be generated from 240 V, 50 Hz mains. An inductor is now also then connected in series. Note: The resistance of the inductor should be ignored and also assume the waveform to be sinusoidal. Determine the phase difference between the current and the applied voltage, the impedance of the circuit and the inductance of the inductor.Assume that the voltage applied to a load is V = 208- 30° V and the current flowing through the load is I = 5415° A a. Calculate the complex power S consumed by this load. b. Is this load inductive or capacitive? c. Calculate the power factor of this load. d. Calculate the reactive power consumed or supplied by this load. Does the load consume reactive power from the source or supply it to the source?
- 2)With reference to the waveform given below formulate the equation for the average value of DC voltage available across the load, if the load connected is a pure resistive load and if the circuit applicable to this waveform is fed from a load having 180 ohm 50 Hz start connected input with the value of resistance equivalent to 200 ohm solve and obtain the value of Dc power in the load (3 phase bridge) Van Vbn Ven P 180° 210° 360° - Vm D1 & D2 DI&D6 D3 & D6 D3&D4 D5&D4 D5&D2 120° 120°2)With reference to the waveform given below formulate the equation for the average value of DC voltage available across the load, if the load connected is a pure resistive load and if the circuit applicable tot his waveform is fed from a load having 180 volt 50 Hz start connected input with the value of resistance equivalent to 200 ohm solve and obtain the value of Dc power in the load (3 phase bridge) Van Vbn Vcn +Vm P 180° 210° 360° D3&D4 D5&D4 D5&D2 D1 & D2 D1&D6 D3 & D6 120° 120°In general, a three-phase induction motor isdesigned for wye connection operation. However, forshort-time operation, a delta connection can be used atthe nominal wye voltage. Find the ratio between thepower delivered to the same motor in the wye anddelta connections.