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A 600kVA, 600 V, 0.9-PF-leading, Y-connected synchronous motor has a synchronous reactance of 1.0 per unit and an armature resistance of 0.1 per unit. At the current time, EA = 1<12 pu and Phase Voltage = 1<0 pu.
a.) Is this machine currently acting as a motor or a generator?
b.) How much power P is this machine consuming from or supplying to the electrical system?
c.) How much reactive power Q is this machine consuming from or supplying to the electrical system?
d.) Is this machine operating within its rated units?
a. Calculate the optimum refractive index of a single layer thin film antireflection coating for the silicon air interface at this wavelength. b. Calculate the optimum thickness of the layer.
Three towns A, B & C are situated at the corners of an equivalent triangle of side 30 km. It is proposed to supply power to extent of 30 MW, 10 MW, 20 MW to A, B & C respectively from one substation. Where should substation be located to minimize ..
Determine the current drawn from a three-phase 440 V line by a three-phase 15-hp motor operating at full load, 90% efficiency, and 80% power-factor lagging. Find the values of P and Q drawn from the line. (Hint: 1hp = 746W)
Consider the transformer to deliver its rated kilovoltamperes at 0.80 power factor lagging to a load on the low-voltage side with 240 V across the load. Find the highside terminal voltage.
explain the function of frequency dial and frequency range.
Analysis of discrete time waveforms in z domain, A discrete time domain signal x(n) - u(n) - u(n-10) is decomposed and plotted. It is then examined in the z domian by appropriate transformation and algebraic manipulation.
A 3.3V, 30 A dc power supply is to be designed with a ripple of less than 2.5%. Assume that a half-wave rectifier circuit (60 Hz) with a capacitor filter is used.
"Power Outage" refers to that the receive signal power falls below a certain threshold. Consider for a RF signal in a Rayleigh fading channel with average receive signal power 22 = - 80dBm. What will be the power outage probability of this channel..
A square plate of titanium is 12cm along the top, 12cm on the right side, and 5mm thick. A normal tensile force of 15kN is applied to the top side of the plate. A normal tensile force of 20kN is applied to the right side of the plate.
Radio Systems, In design of radio systems that incorporate wireless networks, considerations must be taken such as user access, transmission direction, switching and signal strength.
In a long cilindric wire with a radius of 2 cm, a corrent with 80A goes thorugh it. What is the magnetic energy per unit of wire lenght?
Do you think that an electric automobile based on capacitive energy storage is feasible?
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