Often, we encounter delta-connected loads such as that illustrated in Figure P2.21, in three-phase power distribution systems (which are treated in Section 5.7). If we only have access to the three terminals, a method for determining the resistances is to repeatedly short two terminals together and measure the resistance between the shorted terminals and the third terminal. Then, the resistances can be calculated from the three measurements Suppose that the measurements are Ras=12 Ω , Rbs=20 Ω , and Rcs=15 Ω . c) Where Ras is the resistance between terminal a and the short between b and c , etc. Determine the values of Ra, Rb, and Rc. (Hint: You may find the equations easier to deal with if you work in terms of conductances rather than resistances Once the conductances are known, you can easily invert their values to find the resistances) Figure P2.21
Often, we encounter delta-connected loads such as that illustrated in Figure P2.21, in three-phase power distribution systems (which are treated in Section 5.7). If we only have access to the three terminals, a method for determining the resistances is to repeatedly short two terminals together and measure the resistance between the shorted terminals and the third terminal. Then, the resistances can be calculated from the three measurements Suppose that the measurements are Ras=12 Ω , Rbs=20 Ω , and Rcs=15 Ω . c) Where Ras is the resistance between terminal a and the short between b and c , etc. Determine the values of Ra, Rb, and Rc. (Hint: You may find the equations easier to deal with if you work in terms of conductances rather than resistances Once the conductances are known, you can easily invert their values to find the resistances) Figure P2.21
Solution Summary: The author calculates the value of resistance R_as and the short between the two.
Often, we encounter delta-connected loads such as that illustrated in Figure P2.21, in three-phase power distribution systems (which are treated in Section 5.7). If we only have access to the three terminals, a method for determining the resistances is to repeatedly short two terminals together and measure the resistance between the shorted terminals and the third terminal. Then, the resistances can be calculated from the three measurements Suppose that the measurements are Ras=12
Ω
, Rbs=20
Ω
, and Rcs=15
Ω
. c) Where Ras is the resistance between terminal a and the short between b and c, etc. Determine the values of Ra, Rb, and Rc. (Hint: You may find the equations easier to deal with if you work in terms of conductances rather than resistances Once the conductances are known, you can easily invert their values to find the resistances)
Two impedances consist of resistance of (15 ohms and series connectedinductance of 0.04 henry) and (resistance of 10 ohms, inductance of 0.1 henryand a capacitance of 100 microfarad, all in series) are connected in series andare connected to 230 volts, 50 – Hz AC source. Find: (a) current drawn, (b) voltageacross each impedance, (c) individual and total power factor. Draw the phasordiagram.
For the circuit given in Figure 1,
a) Find the Thevenin equivalent circuit with respect to terminals a-b
b) When a 5000 resistor is connected to terminal a-b, find the voltage on the
resistor
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c) It will be connected to a-b terminals and its voltage on 5000 load will be
132 kV rms. What should be the capacitive reactance value that will
increase it?
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d) What happens to the short-circuit current when the a-b terminals are
short-circuited?
2+1202
000 m
da
127/6
kV rms ob
1.5 +/902
000 w
12725
kV ms
Need asap pls help. Solve for the voltages across and currents through each component. Show the complete solution and explain. The total power should be zero..
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