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A 400-kV transmission line has a hot-weather power rating of1400 MVA. If the transmission line is operating in cold weather, itis rated for 2200 MVA (at 400 kV). The transmission line is undercold weather conditions, and the operating voltage is 390 kV. What is the per-unit value of line-to-line voltage and phase voltage with the operating voltage of 390 kV? What is the per-unit ratedcold-weather power if the hot-weather rating is considered to be 1p.u.?
Explain charge sharing in dynamic circuits. For a 3-input dynamic NAND gate, discuss charge sharing, and explain the design requirements under which the gate operates correctly in the presence of charge sharing.
1- Find the voltage across the inductor for t > 0 2- Sketch the voltage and the current as a function of time 3- Find the power ( in microwatts) at the terminals of the inductor when t = 200 ms
Two 5 H inductors connected in series are subjected to an electric current that changes at a rate of 4.5 amps per second. How much voltage will be dropped across the series combination
A 480-120 volt, 5kVA, 2-winding transformer is to be used as an autotransformer to supply a 480-volt circuit from a 600-volt source. When tested as a 2-winding transformer at rated load, 0.8 pf lagging, its efficiency is 0.965.
if a circuit contains 3 automatic switches and we want that, with a probability of 95%, during a given time interval they are all working, what probability of failure per time interval can we admit for a single switch
Digital Communications uses a few specific modulation formats. Research at least 5 different applications or standards and explain what modulation format is used and what is the bandwidth over which you need to equalize the channel? Determine the ..
How many different teams can be organized consisting of two men, two women, and two children? We have the following groups available for team assignments: six men, five women, and four children.
1) Ohm's. Law is considered one of the key foundation in electronics . Why (2) Why do we have to build and test circuits when we have simulation tools
Solar Cell Consider a GaAs PN junction solar cell with the following parameters. Na=10^17 cm^-3, Nd= 2*10^16 cm^-3, Dn=190 cm^2/s, Dp=10 cm^2/s, Tn0=10^-7s, and Tp0=10^-8s.
Determine the conductor size for each motor tap, the motor controller size, overload rating, motor and controller disconnect rating, time-delay fuse rating, and motor branch circuit conductor size.
A balanced Y-connected power system is known to have Van=100
How a transformer works and apply those rules to a transformer where the primary core cross-sectional area is twice.
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