Determine line currents and line voltages at the loads a 0,1 Q jo.2 N A 152 j4 N 408-240° V rms 0,1 0 b. jo.2 n B 15 0 u j4 N jo.2 N 15 Ω ww j4 N 0,1 Q
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- Given: 1. 2 wye-connected loads per phase to a 3 phase power source 2. first load consists of a 55ohm resistance and a 0.05H inductance per phase 3. second load consumes 1kW and power factor of 0.7 lagging per phase 4. RMS of voltage across the loads are 220V, frequency 120Hz per phase 5. single phase equivalent is shown in the figure: Question: What are the RMS line current at load 1 and 2 respectively?Under balanced operating conditions, consider the 3-phase complex power delivered by the 3-phase source to the 3-phase load. Match the following expressions, those on the left to those on the right. 0) Real power, Py (ii) Reactive power, Qu (ii) Total apparent power Sy (iv) Complex power, Sy (a) (V3 VLL. IL)VA (b) (V3 Vu sng) var (e) (V3 VLL. IL cos ø) W (d) Py +Qy Note that VLL is the rms line-to-line voltage, IL is the ms line current, and o is the power-factor angle.Determine the phase sequence of the set of voltages Van = 200 cos(ωt + 10°), Vbn = 200 cos(ωt − 230°), Vcn = 200 cos(ωt − 110°)
- vs(t) = 100sin(4t + 120°) V y=3 a)Convert the circuit to phasor medium? b)Calculate the value of equivalent impedance (Zyük) of the load.? c)Load current, active and reactive powers of the load, apparent power and power factor calculate.? d)Express the load current based on time.?Estimate the distance over which a load of 15000 KW at p.f-0.8 lagging can be delivered by a 3-phase T.L having conductor each of resistance 0.8 2 per km the voltage at the receiving end is to be 132 KV and the losses in the line is to be 5% of received powerVisible power of Z1 = |S1| = 16 kVA and at 0.8 back power factor; Visible power of Z2 = |S2| = 25 kVA and operates at unit power factor; Loads ZW = 5 + j26ohm/conductor is connected to the source by transmission line; VL = 3.8 kV Find the visible power of source,power factor and rms of source
- Use 3 decimal places and box thefinal answer. The instantaneous voltage and current for an ac circuit are v=155.6 sin 377t V and i=7.07 sin (317t - 30degrees) A. Determine the following: a) Impedance of the series circuit b) the real or true power in watts c) reactive power in vars d) apparent power in vac) For a transmission line w/characteristic impedance Z0 = 50 W. At some point of the line, a forward wave has the voltage V+ = 10V and backward wave has the voltage V- = 4V. i) Currents of the forward wave and backward wave at that point. ii) Measured voltage and current at that point. d) A transmission line has the following properties: Length, L = 3 m. Characteristic impedance Z0 = 50 W. The load impedance ZL = 100 W. And phase constant b = p/3. Assume the forward voltage at z = 0 is VA =10ejp/4 At z = 3m, calculate: i) Forward voltage and forward current. ii) Backward voltage and backward current. iii) Measured (total) voltage and current across the loadAC Power and Power Factor 1. Two loads are connected in parallel across a 13,200-volt line. Load A draws 200kW at 0.6 p.f. (lagging), load B takes 200kVA at 0.8 p.f. (lagging). Find the reactive, apparent and true power and the line current.
- The power factor for an inductive circuit (R-L load), in which the current lags the voltage, is said to be (a) Lagging (b) Leading (c) ZeroThe current in a given conductor is represented by the geometric sum of two currents whose equation are i1 = 30 sin 377t and i2 = 25 cos 377t. What is the rms value of the current in the conductor?A three-phase 2400 V RMS supply feeds a load of 300 kVA, FP = 0.8 delayed in parallel with another of 240 kVA and FP = 0.6 ahead. Considering the ABC phase sequence, determine the line currents. note: the voltage is line obs: