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An automatic automotive spray painting system consists of conveyors, spraying, dust and overspray extraction fans with electrostatic and water walls, finishing with baking ovens. This system is connected to a 415V, 50 Hz three phase and has been three divided into three balanced loads, as follows:
LOAD 1 (DELTA): 150 kVA at a power factor of 0.60 lagging;LOAD 2 (STAR): 44 kW at a power factor of 0.55 leading;LOAD 3 (STAR): ZR = ZW = ZB = 3.5 + j 2.75 O;
(i) Draw a diagram of the loads.Determine: (ii) The apparent power (kVA), active power (kW) and reactive power (kVAr) of each of the three loads.(iii) The total apparent power kVA, total active power (kW) and the total reactive power (kVAr) of the loads.(iv) The capacitive kVAr required to correct the overall supply power factor to 0.85 lagging.(v) The line current drawn from the three phase supply before and after power factor correction.
Frequency Range, Local Oscillator Frequency, Image Frequency, and Attenuation, A radio receiver for the AM broadcast band covers the frequency range 550 to 1600 kHz. The IF frequency is 455 kHz and the local oscillator is above the received signal..
design a 4-bit serial adder (VHDL code or schematic) which includes two shift registers and a single full-adder to perform the following functionality with proper timing controls. Two 4-bit inputs A and B will be set by eight switches on your Xili..
Identify and describe three different ways to manufacture resistors. These variations can be "form factor" or the technique used to establish the resistance. Provide an example of a resistor de-rating curve from a manufacturer
Suppose 33 mL of 1.20 MHCl is added to 42 mL of a solution containing excess sodium hydroxide, NaOH, in a coffee-cup calorimeter. The solution temperature, originally 25.0C, rises to 31.8C.
Alfredo deDarke sleeps with a 7.5-Watt night light bulb on. He turns it on before getting in bed and turns it off 8 hours later. a. Determine the amount of energy used during one evening in units of kiloWatt*hours.
Draw a relay construction diagram and briefly explain the operation of a relay.
A sinusoidal current is zero and increasing at t = -3.33ms; the next zero crossing occurs at t = 6.67ms. a) calculate T, F, and W. b) if i(0) = 25.98 A, Find i(t). c) By what angle does i(t) lead another current i(t) = 5 sin (wt - 5°) A.
A 50 V DC power supply is connected to a 100 Ohm load resistor. The tested current flowing through the resistor is 0.49 A. find the internal resistance of the DC power suppy.
The NF (dB) is defined as 10log(SNRin/SNRout) - in the unit of dB. If we are given the values of SNRin and SNRout in dB unit, how do we calculate NF (dB) in terms of dB, and how do we calculate NF in term of a pure ratio
A Silicon wafer has a uniform doping density of 8 xl018 atoms cm-3 of Arsenic and 2.5 x 1019 atoms cm-3 of Phosphorus. Assume that all Arsenic atoms are fully (100%) ionized at room temperature but the Phosphorus atoms are 80% ionized.
at the frequency f=12khz, a filter is designed to attenuate the input signal by 78db, find the amplitude of the output signal if the 12khz input has an amplitude of 1V.
If the power of a 500-kHz transmitter is increased from 150 W to 300 W, what would be the percentage change in field intensity at a given distance from the transmitter. What would be the decibel change in field intensity.
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