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a single phase 440V 80kW load with a lagging Pf of .8 is supplied through a feeder of .6+j1.6 ohms and a single phase 100 kVA, 220/440 V transformer. the equiv impedance of the transformer referred to the High Voltage side is 1.15+j4.5 ohm.
draw a schematic showing the transformer connection, determine the voltage at the high voltage terminal of the transformer and the voltage at the sending end of the feeder.
The heater element of an electric kettle has a constant resistance of 100 Ω ohm and the applied voltage is 250 V. Calculate the time taken to raise the temperature of one litre of water from 15°C to 90°C assuming that 85% of the power input
The nameplate on a 50-MVA, 60-Hz single-phase transformer indicates that it has a voltage rating of 8.0-kV: 78-kV. An open-circuit test is conducted from the low-voltage side, and the corresponding instrument readings are 8.0kV, 62.1A, and 206kW.
The input power to the geenrator is 100hp. When the generator is operating at rated values and unity power factor, the generator is 80% efficient. a.) Find the generator speed in rpm and rad/sec. b.) Find the mechanical torque supplied to the gener..
The cylindrical coaxial cable with the cross section shown below, has inner and outer radii of 5mm and 15mm respectively. The dielectric parameters are; er=2, signma=5*10^(-10) S/m and Ur=1
Consider a regenerative Rankine cycle with a 600C and 4-MPa throttle, a 5-kPa condenser, and an open feedwater heater at 500 kPa. Turbine efficiencies are 85%. (a) Draw labeled, coordinated T-s and flow diagrams.
An automatic automotive spray painting system consists of conveyors, spraying, dust and overspray extraction fans with electrostatic and water walls, finishing with baking ovens. This system is connected to a 415V, 50 Hz three phase and has been divi..
A PN junction has a doping concentration of 10^15, 10^16, or 10^17 cm-3 on the lightly doped n-side and of 10^19 cm-3 on the heavily doped p-side. Obtain series of curves of 1/(C^2) vs. V, where V rages from -4V to 0V in steps of 0.5 V.
a.) Create two separate sampled sinusoids with a sampling frequency 7000hz. Two sinusoids frequency at 1000hz, 1900 hz. Add sinusoids together creating x(t). Set time vector between 0 and 10s. b.) With x(t) plot fourier transform using khz as frequ..
Design and sketch a band pass filter consisting of an RC high-pass filter with a cutoff frequency of 300 Hz and an RC low-pass filter with a cutoff frequency of 700 Hz. Carefully select the R and C of each filter so that one filter does not load t..
A museum has three rooms, each with a motion sensor (m0, m1, m2) that outputs 1 when motion is detected. At night, the only person in the museum is one security guard who walks from room to room.
50 kmol per hour of air is compressed from p1 = 1.2 bar to P2 = 6.0 bar in a steady-flow compressor. Delivered mechanical power is 98.8KW. Temperature and velocities are: T1= 300K T2= 520K u1= 10m s^-1 u2= 3.5m s^-1
Write a 4-bit up counter. Your counter has a asynchronous clear and when the clear is activated, the counter is reset to 3. The count range is from 3 to 9.
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