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A 2200-V, 1000-hp, three-phase, 60-Hz, 16-pole, wye-connected, wound-rotor induction motor is connected to a 2200-V, three-phase, 60-Hz bus that is supplied by synchronous generators. The per-phase equivalent circuit of has the following parameters: R1 = 0.1 = R 2, Xl1 = 0.625 = X l2, and Xm = 20 .Ifthe machine is driven at a speed of 459 r/min to act as a generator of real power, find the rotor current referred to the stator and the real and reactive power outputs of the induction machine.
Explain Dielectric constant. Dielectric constant: This is also termed as 'Permittivity'. All insulating material possesses an electrical capacitance. Such capacitance of unit d
Explain Fundamentals of Load Flow Analysis The calculation of electrical power system load flow or current flow is a problem which has no direct solution. It is not that a solu
For the amplifier circuit shown below estimate the mid band voltage gain if the EARLY voltage (V A ) of the current mirror transistors is 80 volts. Assume the d.c biasing is optim
Q. What do you understand by common control? In some switching systems, control subsystem may be an integral part of switching network itself. Such system iscalled direct contr
sample problem and solutions with answer
Power Diode A power diode is a two terminal, anode a and cathode K and two layer P and N junction devices. A PN junction normally formed by allowing diffusion and epita
Work must be done against the electromagnetic torque in order to generate the voltage (and current) supplied to the electrical load connected to the generator. Therefore energy con
3) The impedance for a 120 km, 230-kV line is given as j 0.9 ohm/km and j 0.6 ohm/km for self and mutual terms respectively; resistance is neglected. The mho characteristic for the
Explain Soft ferrites and their applications. Soft ferrites and their applications: Such are non- metallic compounds having ferric oxide and one or two bivalent metal oxides as
Q. What is thermal runaway? State one method to prevent the same? The effect of changes in leakage current (ICO) and current gain(b) on the dc bias point is given by the equat
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