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If the source impedance at a 13.2 kV distribution substation bus is (0.5 + j1.5) Ω per phase, compute the RMS and maximum peak instantaneous value of the fault current, for a balanced three-phase fault.
For the system (X/R) ratio of 3.0, the asymmetrical factor is 1.9495 and the time of peak is 7.1 ms (see Problem 7.4).
Comment on the withstanding peak current capability to which all substation electrical equipment need to be designed.
Comparison of companies to adopt cloud computing
At a given instant in an airplane race, airplane A is flying horizontally in a straight line, and its speed is being increased at a rate of 6 m/s2. Airplane B is flying at the same altitude as airplane A and, as it rounds a pylon, is following a c..
Draw the free-body diagram of the beam which supports the 80-kg load and is supported by the pin at A and a cable which wraps around the pulley at D. Explain the significance of each force on the diagram. (SeeFig)
why were the World War II Liberty ships prone to failure by brittle fracture, whereas the older riveted ships were not similarly affected?
You are designing a simple vessel to store raw material for a production process. The vessel is cylindrical, with an open top and a conical bottom.
Problem 1: State the full name of the section of SOLAS that sets out the minimum standards for the training and competence of crew members.
Calculate the present worth in year 0 of the series of disbursements and determine the value in year 8 that is equivalent to the cash flow stated.
A pulse waveform swinging between ±10 V has a duty ratio of 0.65. What is its average value? If the duty ratio is changed to 0.35, what does the average value become?
The boat in the water holds an iron anchor which is removed from the boat and placed on the shore. The iron anchor is removed from the boat and dropped in the pool.
Consider a refrigeration system using refrigerant- 134a as the working fluid. If this refrigerator is to operate in an environment at 30°C, what is the minimum pressure to which the refrigerant should be compressed? Why?
What is strategic management and what are some of its major objectives? Explain in two paragraphs.
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