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Define Cables - Generation and Absorption of Reactive Power?
It is well known that the shunt capacitance of the cable is very large as compared to that of an overhead line. This is because the phase conductor of a cable is very close to the outer earthed metallic sheath. Hence, cables are generators of reactive power. For example, a 275 kV, 240 MVA cable produces 10 to 12 MVAr per mile and a 33 kV cable produces 0.2 MVAr per mile. Consequently they are not used for long a.c. transmission.
Multiple Tariff Meters or TOU Meters Time of use metering facilitates load control and planning on the part of utilities. This is efficiently achieved using a concept known as
Problem : a) What is an "Embedded System"? Discuss the characteristics of Embedded Systems. b) Describe three downfalls of "Embedded Systems". c) Explain the difference b
Q. Important function of common control subsystem? If a call is destined to a number in an exchange other than present one processing the digits, initial translator generates t
Q. Explain Cellular Telephone Systems? Today radio-based systems make it possible for mobile people to communicate via cellular telephone systems while traveling on airplanes a
please explain phasor diagram and equivalent circuit
Determine the magnetic flux: A coil is wound uniformly with 300 turns over a steel ring of relative permeability 900, with a mean circumference of 40mm and cross-sectional are
Why maximum power output is given by a machine at an efficiency of 50 percent?
Determine the self inductance of the two coils: Two coils with a coefficient of coupling of 0.6 between them are connected in series so as to magnetize (i) in the same directi
Circuits, which provide sinusoidal waveforms, are but useful in themselves and form the basis of many other circuits, such as square and triangular waveform generators, and clocks.
A very widely used alternative form of synchronous motor is the ' indu c tion motor'. This has the advantage that it does not require an auxiliary motor to run the rotor up t
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