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 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"] ha loade
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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.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.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…
- Between the terminals a and b in the figure, there is a load formed by connecting the resistor R0 and inductance L0 in series. The amplitude of the voltage Vs (t) is √2 150 volt phase angle Qs = 0 degree period T = 200π microseconds. Since R = 300ohm and C = 1 microfarad A) If the load phase angle QL = 30 degrees, find the values of R0 and L0 that enable the load to draw the maximum average power from the circuit. =? B) Calculate the average power on the load. =?In the figure, the circuit is given as VRS =√3 . 60V and Zy = 6 + j8. Find the value of C to be connected in order to make the power drawn from the system in a phase 1, to make the load current 1, and to make cos(φ) 1.circuits A balanced 3-phase Y-connected source has using positive phase sequence, ?an = 390∠30˚ ?. Find the complex expression of voltage Eab.
- 1. Write down a formula for the three-phase power factor, assuming perfectly sinusoidal and symmetrical conditions, using line-line voltage measurements. 2. Write down a formula that relates three-phase apparent power to active and reactive power. 3. Draw a graph that depict single-phase waveforms for a purely sinusoidal 50 Hz voltage and a lagging current.A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-line voltages of VL = 440 V rms. This source is connected to a balanced wye-connected load. Each phase of the load consists of a 0.5-H inductance in series with a 30-Ω resistance. Assume that the phase of VanVan is zero. FIND Ia,Ib,Ic, Find the power delivered to the load And Find the reactive power delivered to the load.In the circuit in the figure, there is a load consisting of the series connection of the resistor R0 and the inductance L0 between the terminals a and b. The amplitude of the VS (t) voltage is √2 150 volts, phase angle = 0 degrees, period T = 200π microseconds.Since R = 300 ohms and C = 1 microfarad a)Find the values of R0 and L0 that enable the load to draw maximum average power from the circuit when the load phase angle is constant at 45 degrees? b)Calculate the average power on the load?
- A balanced 3-phase load of 23.5 MVA with PF=0.85 lagging is supplied with a balanced 3-phase source of 12.5 kV (line-to-line). Determine: VLL, IL, and VLN, The phase angle between phase voltage and current, θ, S3ϕ, S3ϕ, P3ϕ, and Q3ϕ, ZY if load is wye and ZΔ if load is delta, What size capacitor bank (in kVAR) would need to be installed to increase the PF to 0.9 lagging.a) Find the average power dissipated in the line shown.b) Find the capacitive reactance that when connected in parallelwith the load will make the load look purely resistive.c) What is the equivalent impedance of the load in (b)?d) Find the average power dissipated in the line when the capacitivereactance is connected across the load.1. a) Find the average power dissipated in the line shown.2. b) Find the capacitive reactance that when connected in parallelwith the load will make the load look purely resistive.3. c) What is the equivalent impedance of the load in (b)?4. d) Find the average power dissipated in the line when the capacitivereactance is connected across the load.5. e) Express the power loss in (d) as a percentage of the power lossfound in (a).