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1. A 60 Hz, 765 kV three-phase overhead transmission line has four ACSR 1113 kcmil 54/3 conductors per phase. Determine the 60 Hz resistance of this line in ohms per km per phase at 50o C. (0.0151 ohms/km per phase)
2. A 7 kV 60 Hz single phase two-wire overhead line has 1/0 copper conductors with 1 m horizontally between conductors. Calculate R (0.607 ohms/mile) and L (2.274 uH/m).
3. A 12 kV 60 Hz three-phase three-wire overhead line has Drake ACSR conductors spaced 4 ft apart in an equilateral triangle. Calculate R (0.1288 ohms/mile) and L (0.9339 uH/m)
4. A 230 kV, 60 Hz, three-phase transposed overhead transmission line has one ACSR 954 kcmil conductor per phase and flat horizontal spacing with 8 m between adjacent conductors. Determine the inductance in H/m and the inductive reactance in ohms/km (1.3 uH/m, 0.506 ohms/km).
A 240kW 500 Volt 1750rpm separately excited dc generator has an overall efficiency of 94%. The shunt field resistance is 60ohms, and the rated current is 5amps. The I^2R loss in the armature is 0.023pu.
Discuss the sequential nature of the Ripple Carry Output Adder. Why is it actually a sequential operation What are problems associated with this type of sequential design? How would you alleviate them
a DC motor turns at a speed of 1460 rpm and produces an output torque of 3.0Nm. The DC voltage applied to the motor is 100V and a current of 5.1A flows through the motor. A. What is the efficiency of the motor
An input signal of 10V at 0o and a frequency of 1592 Hz is applied to a series RLC circuit with resistor R = 100 ohm, inductor L = 20 mH, and capacitor C = 200 nF.
A second-order control system has the closed-loop transfer function T(s)=Y(s)/R(s). The system specifications for a step input follow. Show the permissible area for the poles of T(s) in order to achieve the desired response.
A light comes on in a storeroom when either (or both) of two doors is open. 1. What logic function is most suitable for this operation 2. Draw a circuit to represent each function using a logic gate
A 230kVA, 2300/230V, 60 Hz, step-down transformer has the following parameters. RH =1.2-ohm, XH =3-ohm, RL =12m-ohm, XL =30m-ohm, Rh+c=2k-ohm, , Xm =1.8k-ohm. If the transformer operates at half load with unity power factor
Plot the Bode straight-line approximation phase plot (i.e., f(f) vs. f) for the transfer function over the range f = 10 rad/s to f = 100 krad/s using the 4-cycle semi-log graph paper provided. Label all slopes in degrees/dec and all levels in degr..
A 25MVA, three phase, 13.5kV, Y-connected, two pole, 60Hz synchronous generator was tested by the open circuit test and short circuit test and tabulated in table 1. If the armature resistance is 0.24 ohms per phase.
Characteristics of a filter, A filter has the following characteristics: Attenuation = 3.0 dB from 0 Hz to 2 kHz. From 2 kHz to 20 kHz attenuation increases from 3 dB to 23 dB in a straight line when plotted on axes of power in decibels (vertical a..
Find the propagation delay for a minimum-size inverter for which Kn' = 3 Kp' = 180 uA/V^2 , and (W/L)n = (W/L)p = 0.75 um/0.5 um , VDD = 3.3 V , Vtn = -Vtp = 0.7 V, and the capacitance is roughly 2
Sketch the Capacitance-Voltage characteristics for both devices based on part (d) by giving appropriate labeling to the voltage and capacitance axis. You may assume high f measurements.
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