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Figure P2-4 shows a one-line diagram of a power system consisting of a three-phase 480-V 60-Hz generator supplying two loads through a transmission line with a pair of transformers at either end (NOTE: One-line diagrams are described in Appendix A, the discussion of three-phase power circuits.)
(a) Sketch the per-phase equivalent circuit of this power system.
(b) With the switch opened, find the real power P, reactive power Q, and apparent power S supplied by the generator. What is the power factor of the generator?
(c) With the switch closed, find the real power P, reactive power Q, and apparent power S supplied by the generator. What is the power factor of the generator?
(d) What are the transmission losses (transformer plus transmission line losses) in this system with the switch open? With the switch closed? What is the effect of adding Load 2 to the system?
A four pole DC machine has a wave winding of 300 turns. The flux per pole is .025 webers. The DC machine rotates at 1000 RPM. Determine the generated voltage and the kW rating if the current through the turn is 25 amps.
Consider LTI system S with impulse response h(t) = u(t) - u(t-2). A) Let x1(t) = d/dt(u(t) - u(t-2)). What is the output of the system B) Let x2(t) = cos(pi*t). What is the output of the system
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A network has an input impedance of 120+100j Ω what is the capacitance that should be placed in parallel with the network to provide an input impadance with: a) Zero Reactance at w=1000 rad/s b) Zero Reactance at w=2000 rad/s
A hollow aluminum sphere, with an electrical heater in the center, is used in tests to determine the thermal conductivity of insulating materials.
Assume that vout(t) = Acos(2π ft), and nd an expression for vin(t). Use the results of part (a) to find an expression for the transfer function H (f) = Vout/Vin for the system.
Application: Electrostatic precipitator. An electrostatic precipitator is made by lining the interior of a smoke stack with two half-shells as shown in cross section in Figure 5.54. Assume the stack is very long and a potential difference of 100 k..
where can i find a copy of the answers to textbook review questions in the industrial motor control 6 th edition by
Suppose host A and the DHCP server are separated by 2 kilometers and are connected by a direct link of R = 2 Mbps. Suppose the propagation speed over the link is 2.5×108 meters/sec. Neglecting the processing and queuing delays and assuming each pa..
Important information about Electrical Networks, Engine consumes 5kw of power and a reactive power of 2kvar at current of (3+j2) Amps.
in the process of sampling an analog signal g(t) is multiplied by a periodic train of rectangular pulses c(t)each of unit area ,given that the pulse repetition frequency of this periodic train is fs and the duration of each rectangular pulse is T ..
A material has a dielectric constant of εr=3.0 andhas an atomic density of 1028 atoms per cubic meter. Ifonly two electrons in the outer orbital shell will distort with anapplied E-field, and both electrons follow the same orbital path asa pair
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