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A 13.8-kV: 120-V, 60-Hz potential transformer has the following parameters as
seen from the high-voltage (primary) winding:
X1 = 6.88 k ohm
X'2= 7.59 k ohm
Xm = 6.13 mega ohms
R1=5.51 k ohm
R'2= 6.41 k ohm
a. Assuming that the secondary is open-circuited and that the primary is connected to a 13.8-kV source, calculate the magnitude and phase angle (with respect to the high-voltage source) of the voltage at the secondary terminals.
b. Calculate the magnitude and phase angle of the secondary voltage if a 750 ohm resistive load is connected to the secondary terminals.
For a transfer function with a pair of complex zeros located on the j (omega)-axis, what happens to the frequency response as the frequency applied to the system approaches the value at which the zeros are located
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A synchronous generator rated 1350 MVA at 0.9 pf, 22.5-kV, Xs=11.6% is connected to a power system through a 1500 MVA, 7.9% 24-kV/230-kV generator step up transformer. The power is generated into a 230-kV system.
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a) Determine the self inductance of coil 1, L11 b) Determine the self inductance of coil 2 L22 c) Determine the mutual inductance between the two coils, L12 or L21
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Show (prove) that the signal 3^j2t is an eigenfunction of any LTI system, and nd the formula for the eigenvalue. That is, use the convolution integral and simplify to show that if you input 3^j2t into an LTI system
An AM receiver, operating with a sinusoidal modulating signal and 80 percent modulation, has an output signal-to-noise ratio of 30 dB. a) What is the correspoding carrier- to - noise ratio
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The boards have a weight of 40 lb, centered G. Determine the smallest angle Theta required for the man to support these boards, neglecting the man's weight and the friction between his shoes and the floor.
Use z transforms to find the ZIR yZI(k), the ZSR yZS(k), and the complete response y(k) for each system. (E+0.5){y(k)} = 0, y(0) = 0. (E2-3E+2){y(k)} = us(k), y(0) = 2, y(1) = 0. (us(k) = unit step sequence.)
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