6. A 240-Vrms 50-Hz supply serves a load that is 10 kW (resistive), 15 KVAR (capacitive), and 22 kVAR (inductive). Find: (a) The apparent power; (b) The current drawn from the supply; (c) The KVAR rating and capacitance required to improve the power factor to 0.96;
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- A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)Find the complex power and power factor for the indicated element(s).( need only handwritten solution .otherwise downvote.)The total power drawn by the two-impedance load in parallel is 26kW at 0.98 power factor lagging, it is being supplied by a 230-volts AC source. One of the loads (Load 1) takes 16kVA at 0.77 power factor lagging. What is the reactive power of the unknown impedance (Load 2)?
- (b) An inductive load consisting of resistor, R and inductor, L in series feeding from a 240430° Vrms, 50 Hz supply consumes 6 kW at lagging power factor of 0.88. (i) Determine the current through the load. (ii) Find R and L. (iii) Draw the phasor diagram of supply voltage and current.The p.u. impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. Then the p.u. impedance value of an alternator for the new base values of 13.8 kV and 50 MVA is......A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuit.
- Draw the sinusoidal waveform of the AC voltage and current for the given loads below. Describe the characteristics of the waveform for each load. A. Pure resistor B. Pure inductor C. Pure capacitorA single phase AC chopper supplies a pure inductive load of 0.02H from 220V, 50HZ AC supply. The triggering angle of the thyristors is 100°. (Assume the circuit is ideal.) a. Sketch the circuit b. Develop the load current expression and find the decay angle of the load current c. Sketch the load voltage and load current waveforms d. Calculate the RMS value of load voltage e. Calculate the RMS value of load current f. If the triggering angle of the thyristors is chosen as 60°. Explain the operation of the circuit.(a) A very important parameter in AC power circuits is power factor. Justify this phrase. Then, explain the difference between leading and lagging power factor. Describe the phase relationship between voltage and current for these two conditions to support your answer.
- A 120 V, 60 Hz power source is connected across an 800 ohm resistance in series with an unknown capacitor. The voltage drop across the resistor is 102 V. Find the, a.) current of the circuit b.) impedance of the circuit c.) Capacitive reactance d.) capacitance value.A 120V adjustable frequency ac source is connected in series with a resistor, an inductor, and a capacitor. At 60Hz, the resistance is 5 ohms, the inductive reactance is 3 ohms, and the capacitive reactance is 4 ohms. Compute: (a)load impedance at 60Hz (b) value of the capacitance and inductance Explain each step. Please recheckLance Smile operated two loads in parallel. The loads draw a total of 3kW at a 90% power factor lagging operating at a 230 Vrms 60-hz voltage source. Load 1 is taking 1000 W at 80% power factor lagging. Determine the following: a. The power factor of the second load. b. If a capacitor is connected in parallel with the loads, what is the value of the capacitance needed to correct the power factor to 95% lagging for the combined load.