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A four-pole three-phase synchronous generator has Xs = 1.82 per unit and ratings of 60 Hz, 24 kV, and 650 MVA. The generator operates at the following point: 60 Hz, armature voltage of 24 kV, output apparent power of 650 MVA, and power factor of 0.900 lagging.
1. Calculate the output power in MW and per unit, the output reactive power in MVAr and per unit, the armature current in A and per unit, and the excitation voltage Eaf in per unit. Sketch the phasor diagram.
2. Repeat problem 1 but change the power factor to 0.900 leading, holding all else the same.
A lamp of 100 candela is placed 1 m below a plane mirror which reflects 90% of light falling on it. The lamp is hung 4 m above ground. Find the illumination.
A computer employs RAM chips of 256 x 8and ROM chips of 1024 x 8. The computer system needs 2K bytes of RAM, 4K bytes of ROM, and four interface units, each with four registers. A memory-mapped I/0 configuration is used.
A one-dimensional infinite potential well with a width of 12 Ao contains an electron. (a) Calculate the first two energy levels that the electron may occupy. (b) If an electron drops from the second energy level to the first, what is the wavelengt..
two metal sheets form a wedge shaped space. In cyllindrical coordinates, sheet 1 is described by (phi=0,p>0) and sheet 2 is described by (phi=30deg, p>0). A small gap at the z axis prevents the sheets from contacting
The transmission line has an impedance of 600 ohms and is terminated in a load of 600 ohms. The transmitter delivers an average power of 0.1 W to the input of the line.
Write an assembly-language program to add $40 to each element of list1 and store it to the corresponding element of list2. Use a loop. ORG $2000 LIST1 DC.W $21, $442, 3, 4, 5
A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has radius 10.0 centimeters, and the separation between the spheres is 1.50 centimeters.
During an AP, the membrane potential typically moves from -70mV to +20mV and back again. In a cell with 10um radius and 1uF/cm^2, how many charges need to move across the membrane (and back again) to get this 90 mV voltage fluctuation?
An AISI 4140 OQT 1000 sleeve is to be secured to a 2.50-inch diameter solid rod ot the same material employing a class FN1 force fit. The outside diameter of the sleeve is 5.00 inches.
1- Draw a circuit whose output goes to + V sat . When the input signal is below -4V. the output should be -V sat, when the input is above - 4V 2- Design a - 90 phase shift circuit at 1590 Hz , Then for your design calculate 0 at 15 Hz, & 15 KHz
A sequential circuit with three D-type flip-flops Y1Y2Y3, input X and output Z is defined with the following input/output functions: D 1 = X Y 3 + X Y 1 Y 3 D 2 = X ( Y 3 + Y 2 ) + X Y 2 Y 3 D 3 = X Y 3 + Y 2 Y 3 Z = Y3
The anode of the diode is connected to the inverting node of the op-amp, while its cathode is connected to the output of the op-amp. Determine the expression of the output node potential as a function of the input node potential.
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