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(a) Figure Q1.1 illustrates a three-phase power system, in which an ideal three-phase ac generator with an abc phase sequence is connected through a three-phase transmission line to an unbalanced Δ-connected load. The generator is producing a line voltage of 940 V and the line impedance is . (i) Calculate the line currents. (ii) Find the real, reactive and apparent powers supplied by the generator. (iii) Determine the overall power factor of the system. (b) In Figure Q1.2, a three-phase four-wire system operating with a line voltage of 480 V is supplying a balanced motor load at 560 kVA and 0.86 power factor (pf) lagging. The motor load is connected to the three main lines marked a, b, and c. In addition, incandescent lamps (with unity pf) are connected as follows: 48 kW from line a to the neutral, 25 kW from line b to the neutral, and 14 kW from line c to the neutral. The three-wattmeter method is used to measure the power absorbed by the load in each line. (i) Calculate the wattmeter readings. (ii) Find the current in the neutral line.
There is a circuit with a 12V DC battery,500mH inductor, a 45 ohm resistor, and a switch all inseries. Suppose the switch has been closed for a very longtime when a wire is connected over just the battery.
Write a short report that analyses the P&ID - Basic Neutralizer Control System: The neutralizer process may be used to adjust the pH of a feed stream.
Resisitive load, A 4:1 step down transformer uses a 60Vac source on the primary windings.
Give an example of an RC circuit whose transient behavior cannot be modeled by having a function generator with square wave output replacing the mechanical switch.
Evaluate the TL parameters. Include the effect of the earth as ideal. Do not incorporate the effect of the shield wires.
Consider a digital filter with frequency response: H(f)=11+f Assuming the sampling frequency is 1500Hz what is the frequency attenuation of a signal passing through this filter at 280Hz
write a program that prompts the user to successively input a number. the loop will terminate if the user will input
How does ambient temperature affect the forward bias voltage of a diode. For some significant enough increase in temperature, how will the voltage across the diode terminals be affected
Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.
A stream of air at 80 °F and 1.2 atm absolute flowing at a rate of 200 ft3/h is blown through ducts that pass through the interior of a large industrial motor. The air emerges at 500 °F. Calculate the rate at which the air is removing heat generat..
Complete the design, including a schematic, of the implementation of the second version of the Gumball Vending Machine Example using D Flip Flops AND JK Flip Flops. Which of the two is the better design
Design it to give an output that is 1/3 of the supply voltage. Furthermore neither the power ratings of the resistors nor the current rating of the supply are to be exceeded. The voltage output of the divider much not change by more than 1% when l..
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