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A three-phase Y-? transformer is rated 225-kV: 24-kV, 400 MVA and has a series reactance of 11.7 ? as referred to its high-voltage terminals. The transformer is supplying a load of 325 MVA, with 0.93 power factor lagging at a voltage of 24 kV (line-to-line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.11 + j 2.2 ? connected to its high-voltage terminals. For these conditions, calculate
(a) The line-to-line voltage at the high-voltage terminals of the transformer and
(b) The line-to-line voltage at the sending end of the feeder.
Let real periodic sequence x[n] have Fourier Series coefficients ak and sequence y[n] have coefficients bk. Both sequences are periodic with period N = 8. If bk=((-1)k+2ak-2 write an expression for y[n] in terms of x[n].
what is the new resistance level of a copper conductor wire if the lenght is changed from 200 ft to 400 ft, the area is changed from 50,000 CM to 0.10 in ^2 and the original resistance was 7 ohms
An air-standard Otto cycle has a compression ration of 9. At the beggining of compression, p1=100 kPa and T1= 300K. The heat addition per unit mass of air is 1350kJ/Kg. Determine. a) the net work, in kJ of air. b) the thermal efficiency of the cyc..
Which sample produces greater Hall voltage: long and narrow or short and wide Thickness (d) is same in both the cases. With little explanations please. 1) If the concentration of scattering centers increase in the semiconductor, would it increase o..
A motor with an efficiency of 76% supplies 20 hp to a load.It's power factor is 0.6 (lagging). A voltage of 440 VAC (RMS), 60Hz is applied to the motor. a. What is the real power applied to the motor in Watts
Graded-index separate confinement double heterostructure (GRIN-SCH) InGaAs/GaAs lasers with various cavity lengths were tested in the lab. The 100m wide oxide strip lasers consists of two pairs of 10nm In0.2Ga0.8As quantum-well (QW).
Determine the total charge flowing into a element for 0
A 64k x 16 memory uses coincident decoding by splitting theinternal decoder into X-selection and Y-selection. (a) What is the size of each decoder, and how many AND gates arerequired for decoding the address
Using the mfile window the height and distance traveled by a ball thrown at an angle A and with a speed v is: [h(t) =vtsin(A)-0.5gt^2] , [x(t)=vtcos(A)].
Create a bandpass filter with cutoff frequencies of 100-1k, attenuate by at least 3db at desired frequency(100-1k) and at 60Hz attenuate by 10 db. Resistor, Capacitor, Inductor, and Op-amps can be used.
1- Describe how the MOSFET acts as a switch. What could bedone to make the MOSFET ON when the square wave is negative and OFF when the square is positive 2- How is the magnitude of the control voltage determined
a. Draw a block diagram of a closed-loop control system. b. Use the block diagram to describe how the system works. c. What is the advantage of this system over an open-loop system
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