Bonus problem A single phase generator delivers at its terminals a voltage of 600 Volts rms and a current of 30 Amps rms. The real power delivered to a load from its terminals is P= 11.5 kW. Find the reactive power Q.
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- A generator is supplying a load. An incremental change in load of 4 MW requires generation to be increased by 6 MW. The incremental cost at the plant bus is 30 S/MWh. What is the incremental cost at the receiving end?A load consisting of induction motors is drawing 40 kW average real power from a 110-V (RMS), 6 Hz power line at a power factor of 0.7. We need to improve the p.f. to 0.9. a) Are we going to add a capacitor or an inductor to correct the power factor? b) How large is the capacitor or inductor? Add a capacitor in series with load and C= 247UF Add a capacitor in parallel with the load and C= 4699uF O Add an inductor in series with load and L- 30uH O Add an inductor in series with the load andL= 0.9H3. A 12020⁰ Vrms is to supply power to a welder, heater and an induction motor. A welder is a coil of (4+j3) ohm, the induction motor draws 60KW with 0.8 power factor, and the heater is a resistor that draws 15KW power. Find the complex power, real power, reactive power and the total power factor that must be supplied by source. If a capacitor will be used to supply a reactive power in the circuit in order that the net load will have a unity power factor, what reactive power must be supplied by the capacitor? Draw the circuit.
- A single-phase motor draws 220 W at a power factor of 0.8 lagging when connected across a 240 V rms, 60-Hz source. A capacitor is connected in parallel with the load to produce a unity power factor. Determine the required capacitance.A load is operating in a chopper circuit as shown in the figure. It has a duty cycle of 0.4 and chopping frequency is 150 Hz. (consider continuous operation). The value of E is L=0.06H 200V (B) 80V (D) 50V (A) 70V (C) 60VA synchronous generator may be represented by a voltage source of magnitude 1.7 p.u. in series with an impedance of 2 p.u. It is connected to a zero-impedance voltage source of 1 p.u. The ratio of X/R of the impedance is 10. Calculate the power generated and the power delivered to the voltage source if the angle between the voltage sources is 30°.
- Problem 1 Three loads A, B, and C are connected in parallel across a 1.5-kV-rms 60-Hz Source, as show below. Load A consumes 10 kW with a 90 percent lagging power factor. Load B has an apparent power of 15 kVA with an 80 percent lagging power factor. Load C consumes 12 KW with a 70 percent lagging power factor. Find the power, reactive power, and apparent power delivered by the source. What is the power factor seen by the source? State whether it is leading or lagging. Is Source A B C8. The total power supplied to a balance delta load is found in the same way as for a balance wye load. True False Either Neither 12. A load of 20 + j35 ohms is connected across a 220 V, 60 Hz supply. Find the reactive power of the load in var. 595 2420 1042 1382 13. A type of DC source where the characteristic output voltage has perfect unidirectional waveform and is based on electrochemical principle. Generator Inverter Converter Battery 14. Calculate the Rf of a circuit whose impedance is 20+j35 and current of 2A. 0.86 0.91 0.50 0.71 15. What capacitor shall be installed in parallel with a circuit to achieve a unity power factor if the reactive power of a circuit is 200VARS and the voltage is 100V. 80.45 microfarad 53.05 microfarad It's already in unity 62.45 microfarada load of 15 mva with power factor 0.86 lagging is given. Calculate the reactive power delivered by shunt capacitors to increase power factor to 0.9 lagging
- A single-phase AC voltage controller has a resistive load R = 10 Ohm, and the RMS input voltage is Vs = 230 V, 60 Hz. The delay angle is 120 degree. Then power factor of the circuit is: Select one: O a. 1 O b. 0.75 O c. 0.44 O d. None of the above O e. 0.9Required information An ac motor with impedance ZL = (2.8 +1.60) Q is supplied by an RMS value of 220-V, 60-Hz source. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Find the power factor, the average power, and the reactive power. The power factor of the given ac motor is The average power of the given ac motor is The reactive power of the given ac motor is kW. KVAR.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)?