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(a) Figure Q1.1 illustrates a three-phase power system, in which an ideal three-phase ac generator with an abc phase sequence is connected through a three-phase transmission line to an unbalanced Δ-connected load. The generator is producing a line voltage of 940 V and the line impedance is . (i) Calculate the line currents. (ii) Find the real, reactive and apparent powers supplied by the generator. (iii) Determine the overall power factor of the system. (b) In Figure Q1.2, a three-phase four-wire system operating with a line voltage of 480 V is supplying a balanced motor load at 560 kVA and 0.86 power factor (pf) lagging. The motor load is connected to the three main lines marked a, b, and c. In addition, incandescent lamps (with unity pf) are connected as follows: 48 kW from line a to the neutral, 25 kW from line b to the neutral, and 14 kW from line c to the neutral. The three-wattmeter method is used to measure the power absorbed by the load in each line. (i) Calculate the wattmeter readings. (ii) Find the current in the neutral line.
design a regulated poewr supply with these specs Output a dc voltage of 10 V Load Variation: 0.3 -10000ohms Ripple Factor: less 0.1% for 2000ohms load
Compare the capacities of the fiber and conducting cables. How many of the conducting cables are required to equal the capacity of the fiber cable.
a voltage divider is required to produce a 5.5V output from a 12V source. if one of the resistor values is 1.0k, what value is required for the second resistor so that the voltage across the 1.0k resistor is 5.5V
The measured current, voltage and power factor of a premium-efficient, three-phase, 125-hp air compressor motor are shown in the table below. Assume motor is 95.3% efficient at all loads. Loaded Unloaded Current (Amps) 127 63 Voltage (Volts) 476 47..
If the work output is 10kW, find the required heat transfer rate from the high to the low temperature source, and the required heat transfer rate to the low temperature source. What is the themal efficiency of the engine
Two three-phase loads are y-connected across a 300 Volt three phase line. One load draws 10kW at a p.f. of 0.9 leading, and the second load draws 8kW at a p.f. of 0.6 lagging. V(line-neutral)=300V/sqrt(3)=173.21V
Design finite state machine that starts with even number of 1s and followed by odd numbers of 0s. Design finite state machine that starts with odd number of 1s and followed by even numbers of 0s.
Describe the circuit's response to a 4 Vpp sinusoid. Measure its time constant and describe the circuit's response to a 100 Hz, 10 Vpp square wave centred on 0 V.
Shielding Effectiveness with copper and steel at equality, Determine the frequency at which two 1 mm thick shields, one made of copper and the other of steel
A desktop computer uses 60-250 W of power when active and 1-6 W of power when hibernating, depending on the model. An LCD monitor uses about 20-30 W of power, depending on the screen size.
Design a UV flip-flop using a JK flip-flop and two logic gates. where the characteristic table for the UV flip flop is U V Q(t+1) 0 0 1 0 1 !Q(t) 1 0 Q(t) 1 1 Q(t)
i want the solution to a c program that has to implement two input options to read data from the keyboard and to read
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