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An automatic automotive spray painting system consists of conveyors, spraying, dustand overspray extraction fans with electrostatic and water walls, finishing with bakingovens. This system is connected to a 415V, 50 Hz three phase and has been divided into three balanced loads, as follows:
LOAD 1 (STAR): 15 kVA at a power factor of 0.60 lagging;LOAD 2 (DELTA): 24 kW at a power factor of 0.55 lagging;LOAD 3 (DELTA): ZRW = ZWB = ZBR = Unknown impedance, but components are known to be balanced.
The system draws a total apparent power of 44kVA at a power factor of 0.82 lagging from the supply.
Determine:
(i) the STAR capacitance required to correct the overall supply Power Factor to 0.87 lagging.(ii) The total line current drawn from the supply before power factor correction and after.(iii) LOAD 3 apparent power.(iv) LOAD 3 impedances ZRW = ZWB = ZBR.
An electric bass amp is advertised as being able to deliver 200 Watts toan 8 Ohm speaker and 300 Watts to an 4 Ohm speaker. If the amp is a voltage source with an internal resistance, what is the value of the internal resistance
A negative unity feedback loop with input R(s), output Y(s) and error E(s) is placed around the system \(H(s)=1/((s+p_{1})(s+p_{2})...(s+p_{q}))\)(a) Find the transfer function E(s)/R(s).
estimate results in the lights being switched on for an average of 19 hours per day - 6 hours more than needed. The room is lit with seven, 60 W incandescent bulbs, which you can assume are powered by a 115 V constant voltage source.
A table of values of the normalized magnitude of the voltage phasor on the line as a function of position on the line, with the normalization done relative to the value of the voltage magnitude at the voltage maximum point on the line.
The received power at a receiver antenna is -38 dBm. If the system impedance is 50 Ohms, what is the voltage at the receiver antenna. What is the total average power for a commercial AM transmitter with an unmodulated carrier power of 20 kW and 100%..
A series type Ohmmeter uses a 50 ohm, 1mA PMMC the internal battery voltage is 3V the desired scale marking for half scale deflection is 2000 ohm. Calculate:- - Value of R1 & R2
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Four frequencies are applied at the input of a non-linear amplifier. Write down all of the frequency components at the output of the non-linear device. Write down only the first three harmonics. Frequencies of 1205Khz, 1200Khz, 1195Khz
If AC is a sine wave and DC is a straight line, what would the wave look like on a graph if they combine. How/what to calculate to get this new waveform.
A transmission line of char. Impedance 100ohm is used to match a 50ohm section to a 200 ohm section. if the matching is to be done both at 429MHz and 1GHz the length of the transmission line can be approx?.
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
Memory storage and bit density, A hard disk contains four Platters. Each side of the platter is coated with a magnetic oxide, allowing data to be stored on it. The platters are 3.5 inches in diameter.
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