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A 3 phase 400 volt(line to line) wye connected synchronous motor has Xs= 1 ohm per phase and a negligible armature resistance. The field current is so adjusted that the internal(induced) voltage is 270volts per phase, while the motor draws 40 kw power from the source. Calculate the (a) power factor of the motor, and (b) reactive power supplied by the motor to the source.
A 500 MVA, 33kv, three phase steam turbine generator has a synchronous reactance of 1.6 p.u. It delivers a rated output at 0.8 power factor lagging. Calculate (a) the synchronous reactance per phase, (b) rated load current of the machine, and (c) internal voltage drop and output voltage.
A synchronous motor has the following parameters per phase. E=2kv, Eo=5kv, X2=3ohms, and I=700amps. Draw the phasor diagram and determine (a) power angle delta, (b) active power(3phase), (c) reactive power(3phase), (d) power factor of the motor. If the load is removed suddenly, calculate (e) the new power angle and (f) new reactive power(3phase).
Q. Determine L and C of the band pass filter circuit of Figure to have a center frequency of 1 MHz and a bandwidth of 10 kHz. Also find the Q of the filter.
Precautions to be taken in carrying out repairs on HT and LT switch gear? Ans: The following precautions to be taken in carrying out repairs on LT and HT switch gears. a
Q. Digital controller for a steam-turbine driven generator? Figure illustrates the basic elements of a minicomputer system in terms of a block diagram for speed and voltage con
Question a) Explain, with the aid of diagrams, the differences between the Princeton and Harvard microprocessor architectures. b) Describe why the principle of locality of r
Q. Advantage of digital technology? The primary advantage of digital technology is the low cost, simplicity, and versatility of the digital building blocks. Because digital sig
Semi-conductors have temperature coefficient of resistance. (A) Negative (B) Positive (C) Both positive and negative (D) none o
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Pressure guage
Q. Athree-phase, 60-Hz transmission line has a total series impedance of 22.86 62.3° per phase. It delivers 2.5 MW at 13.8 kV to a load connected to its receiving end. Compute th
Open the GetSParameter schematic. You will need to modify the design to include the biasing components. (Even at this stage I would recommend the use of models of real resistors th
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