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As shown in Figure, a 25-MVA, 13.8-kV, 60-Hz synchronous generator with X"d = 0:15 per unit is connected through a transformer to a bus that supplies four identical motors. The rating of the three-phase transformer is 25 MVA, 13.8/6.9 kV, with a leakage reactance of 0.1 per unit.
Each motor has a subtransient reactance Xd" = 0.2 per unit on a base of 5 MVA and 6.9 kV. A three-phase fault occurs at point P, when the bus voltage at the motors is 6.9 kV.
Determine:
(a) the subtransient fault current,
(b) the subtransient current through breaker A,
(c) the symmetrical short-circuit interrupting current (as defined for circuit breaker applications) in the fault and in breaker A.
Calculate the degree of conversion if the feed to an ammonia synthesis reactor is a mixture of N2(g), H2(g) and NH3(g) in the mole ratio 1:3:0.1 at 800 K and 100 bar. Assume that the reaction mixture behaves like an ideal gas.
DATA AQUISITION Lab Project - Design and build a signal conditioning system from sensor to 4-20ma transmission to 0-10V controller input. Using LABVIEW preferably 2015 edition
If A = B = 1, the value of the data inputs D are subtracted from the accumulator. If A = 1 and B = o, the value of the data inputs D are loaded directly into the register. If A = o and B = 1, the accumulator should shift right with zero fill. I..
Tesla Motors recently announced their new model 3, which is a less expensive version of their model S. The company received over a quarter of a million pre-orders. Since the launch, potential buyers have been evaluating the locations of charging s..
To analyze a normally biased BJT circuit comprising of a BJT and resistors and measure the circuit voltages between emitter, common, base, and collector.
A medical facility treats non-emergency patients. Patients arrive according to an exponential interarrival time with a mean of 15 minutes. Upon arrival they check in at a registration desk staffed by a single nurse. Registration times follow a tri..
In a processing plant, a chemical tower has a liquid which is vaporized. However, if the vapor in the tower reaches 150°C, an alarm needs to be generated so that safe shutdown of that system of the plant may be initiated. An RTD will be used to me..
Compute the fault currents and voltages for the following faults occurring at the faulted bus.
The scenarios are these: You have been asked to help your best friend plan a wedding or a family reunion in another city. You have no concern for schedule or budget at the moment, only defining the work that needs to be done for the wedding or r..
E15: Fundamentals of Digital Systems - Fall 2010 - HOMEWORK 5. Prove that the Shannon expansion theorem works for any Boolean function expressed as sum of product terms
Consider MOS transistors fabricated in a 65-nm process for which μnCox = 470 μA/V2, μpCox = 190 μA/V2, Vtn =-Vtp = 0.35 V, and VDD =1 V. Find Ron of an NMOS transistor with W/L = 1.5.
Briefly describe why thermal oxidation of silicon has both linear and parabolic components to the growth rate - Calculate the impingement rate and mean free path for oxygen molecules
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