G 10.77 Find Vs in the network in Fig. P10.77. 1:2 0.1Ω Vs j0.2 Ω 2 kW 0.8 pf lagging Ideal 10 kW 0.85 pf lagging 220/0° Vrms
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- what is the mutual inductance in ohms (or the mutual inductive reactance ) between the two mutually-coupled inductors? if circuit to the left of load Z is converted into its Thevenin's equivalent, what would be the magnitude of ZTh in ohms? what is the phase angle of ZTh in degrees? what would be the phase angle of VTh in degrees? what would be the magnitude of VTh in volts if E = 120 V?The maximum transferred average power to a load without restrictions calculated in terms of the RMS (effective) value of Vth is: Select one: O a. IVthl/Rth O b. Vthl2/4.Rth OC. IVl²/8.Rth O d. IVl²/2.RhAn industrial load is fed from an AC voltage source (V,) via a transmission-line feeder with an impedance Zune. The load operates at 30 kW, 0.8 pf lagging and voltage of 240 V-rms angle 0°. The real power and reactive power dissipated in the transmission-line feeder are 1.8 kW and 2.4 KVAR, respectively. a) Draw a schematic diagram of the circuit. b) Find the impedance of the transmission-line feeder Zine. b) Find the magnitude and the phase angle of the voltage source.
- A power station is to supply four regions of loads whose peak values are 10,000 kW, 5000 kW, 8000 kW and 7000 kW. The diversity factor of the load at the station is 1.5 and the average annual load factor is 60%. Calculate the maximum demand on the station and annual energy supplied from the station.Problem 3 A voltage source with a complex internal impedance is connected to a load as shown. The load absorbs 1kWof 6.4 2 24 mH average power at 100Vrms with a power factor of 0.80 lagging. The source frequency is 200 rad/s. a) Determine the source voltage V1. b) Find the type and value of the element to be placed in parallel with the load so that maximum power is V, transferred to the load.Two loads are placed in parallel across a 120Vrms 60Hz line. The first load draws 150VA at a Lagging Power Factor of 0.707, while the second load draws 50-VAR at a Leading Power Factor of 0.8. A third load is purely capacitive and is placed in parallel across the 120-V line in order to make the PF of the system equal to unity. Calculate the value of the capacitance.
- A p.d. of 200430° V is applied to two branches connected in parallel. The currents in the respective branches are 20260° A and 40430° A. Find the apparent power (in kV A) and the active power (in kW) in each branch and in the main networkThe three loads in the circuit in Fig. P10.26 can be described as follows: Load 1 is a 240 N resistor in series with an inductive reactance of 70 ; load 2 is a capacitive reactance of 120 in series with a 160 resistor; and load 3 is a 30 N resistor in series with a capacitive reactance of 40 N. The frequency of the voltage source is 60 Hz. a) Give the power factor and reactive factor of each load. b) Give the power factor and reactive factor of the composite load seen by the voltage source. Figure P10.26 Vg Load 1 Load 2 Load 3Problem: An industrial load takes 20 kW at 0.71 pf lagging from a 440 volt RMS supply. If a capa e citor with Qc=-10 kvars is connected in parallel with the load, what is the percentage change in the RMS current that flows in the line that supplies the load. Assume that the load voltage remains at 440 volt RMS. Load
- PART 2 A load connected to a 120 Vrm source is drawing 1,600 VA at 0.6 power factor lag. a) What is the reactive power absorbed by the load? Answer: VAR b) A capacitor with impedance -j20 Q is connected across (or in parallel with) the load. What is the reactive power generated by the source after the addition of the capacitor? VAR Answer:n The maximum transferred average power to a load without restrictions calculated in terms of the RMS (effective) value of th is: Select one: O a. IVthl²/8.Rth O b. [Vth²/4.Rth O c. IVth2/2.Rth O d. Vthl²/Rth consider RMS) The Complex power absorbed by the inductive branchThe figure below shows an RLC electrical network operating on alternating current. A load impedance Z of unknown value has been connected to the output of said network. a) Find the value of the load impedance Z, which is necessary to connect to the output of the given network to obtain the maximum average power transfer.b) Determine the value of the maximum average power transferred to the load found in the previous section.Note, the values of all impedances shown in the circuit are given in Ohms.