Electrical Power Systems Problems 1. A three-phase line serves a 54MW load with a .9 lagging power factor at a line voltage of 138KV. The line constants are: A = D = 1 at 0 degrees B = 85 ohms At 70 degrees C = 950 x 10^4 siemens at 90 degrees Find the line and phase values of voltage and current at the sending end.
[Power electronics] The measured values of a diode at a temperature of 25 Degrees Celsius are: Vd=1V at Id=50A, Vd=1.5V at Id=600A. Determine (i) the emission coefficient n, and (ii) the leakage current. ============================================== Answers: a. (a) n=6, (b) Is=0.2A b. (i) n=5, (ii) Is=1A c. (i) n=8, (ii)
SEE ATTACHMENT: #4 and the Figure Above it. Questions: a.)What type of timer has been programmed? b.)What is the length of the time-delay period? c.)When does the timer start timing? d.)When is the reset? e.)When will rung 3 be true? f.)When will rung 5 be true? g.)When will output PL4 be energized? h.)Assume that
Conservation of energy requires that the sum of the power absorbed by all the elements in a circuit be zero. The following Figure shows a circuit.
Conservation of energy requires that the sum of the power absorbed by all the elements in a circuit be zero. The following Figure shows a circuit. All of the element voltage and current are specified. Are these voltages and currents correct? Hint: Calculate the power absorbed by each element and add them up. Work out the
Please help me with this problem. If you can please supply any diagrams for this problem. The theatre's concerns when changing of wired rifle microphones to a radio microphone system are: on propagation related problems within the theatre and the positioning of transmit and receive antennas and "space diversity" reception.
2. A fault-tolerant nuclear reactor protection system consists of 3 processors and 6 memories. The system will fail if (a) any 2 of the 3 processors fail, or (b) any 2 of the 6 memories fail. The nominal failure rates of these processors and memories, provided by the manufacturers, are 1 per 10,000 hours and 1 per 2,000 hours
In order to charge a battery there must be a potential difference between the charger and the battery,i.e.a charging voltage.As a battery is being charged this potential difference reduces and since the charging current is related to this charging voltage the rate of charging also reduces. A battery is put on charge.The relat
A white Gaussian noise process X(t) with power spectral density (PSD) N0/2=0.1 is input to an LTI filter with a transfer function H(f) given by H(f) = 2, |f| <= W and 0, otherwise The output is denoted Y(t). (1) Find the autocorrelation function RX(t) of X(t). (2) Find E[Y(t)]. (3) Find the PSD of Y(t). (4) De
Have a problem with determining the power spectral density of a discrete-time process (see attached file).
Hi, I need assistance answering the following questions. Please open the attachment to see the problems, they are related to circuits.
I need help breaking this problem down. We DO NOT use MATLAB or Spice. The JPEG shows the entire problem with the given sets. Can anyone show me the correct set?
Design a half-wave unregulated power supply to give VL = 15V at IL = 10mA with deltav <= 0.1V. Assume a 120V, 60Hz supply. What is the regulation of the power supply?
An A4 inkjet printer uses ink cartridges with a mass of 250g supported by a carrier having a mass of 150g. The printer head is moved across the page by a motor driving through a toothed belt. It makes a single traverse of the page in 1s, which includes acceleration and deceleration times. The acceleration and deceleration zones
FIND POWER SERIES SOLUTIONS IN POWERS OF X OF THE D.E. y''-xy'+(3x-2)y=0 and FIND POWER SERIES SOLUTION OF EA. OF THE INITIAL-VALUE. y''+xy'-2y=0, y(0)=0, y'(0)=1 ON BOTH OF THE PROBLEMS I GOT STUCK ON THE RECURRENCE FORMULA AND GETTING POWERS OF X.