Homework Answers
Question 2 A single-phase transformer has the following nameplate ratings: 100 kVA, 7200/240 V and 60...
Question 2 A single-phase transformer has the following nameplate ratings: 100 kVA, 7200/240 V and 60 Hz. The following results are obtained from open-circuit and short-circuit tests: Test Open-circuit Short-circuit Voltage 7200 V 250 V Current 0.65 A 13.89 A Real Power Input 425 W 1420 W a) Determine the parameters of this transformer, all referred to the primary side. b) The secondary of this transformer is connected to a load that draws 100% of the rated power at rated...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and Vs=450 V. a) Find...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and
Vs=450 V.
a) Find the voltage at the high-voltage side of the
transformer (Vp).
b) Find the Voltage Regulation and the Efficiency of this
transformer under this load.
Page 2 of
Problem 3 The equivalent circuit of a 22KVA, 11700/450 V, 60Hz, single phase transformer when referred to its low-voltage side is considered in this problem. The transformer is connected to a load. 0.225+j1.12 's ROXO + Up...
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage...
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage impedance is (1.2+j 2.0) 2. the low-side leakage impedance is (0.012 ti 0.02) S2, and Xm at the high-side is 1800 2. Neglect the Hysteresis and Eddy current loss resistance Rhe Calculate the input voltage if the output voltage is 240 V (rms). Given the load resistance is 1.5 12 and the power factor is 0.8 (lagging). ཉིས་པ་དེ། དེ་ | ༼ ། ༼། །
15 V 39 k 2 k 1 uF Vi 0.33uF O 2N3904 100 k 6.2 k...
15 V 39 k 2 k 1 uF Vi 0.33uF O 2N3904 100 k 6.2 k 510 47 uF = Analytically calculate the Q point parameters, amplifier voltage voltage gain, input and output resistances of the circuit. (assume ß 200, VA VT = 25mV). = 100 V, =
112 mann Is → I 2652 250 20° V(rms) -j100 12 j392 Quiz 12b The load...
112 mann Is → I 2652 250 20° V(rms) -j100 12 j392 Quiz 12b The load L is the series resistor and inductor in parallel with the capacitor. a) Calculate the rms phasors Vi and IL | Vel= Vrms. Phase angle Vų = ° (Degrees) (smallest negative angle) | IL 1 = Arms Phase angle IL = (Degrees) (smallest negative angle) b) Calculate the average power and magnetizing reactive power absorbed by the (26+j 39) 22 (Ohm) elements. Pavg =...
Capctr05 20Ω Given: The capacitors have initial voltages as shown in the above circuit. Att-0, the switch is closed. equ e Calculate the final voltage, Vi has reached equilibrium the final voltage, V...
Capctr05 20Ω Given: The capacitors have initial voltages as shown in the above circuit. Att-0, the switch is closed. equ e Calculate the final voltage, Vi has reached equilibrium the final voltage, V across the capacitor, on the right, and the energy dissipated in the resis or ie, wR by the t me the system across the capacitor on the le Solution Submit these values
Capctr05 20Ω Given: The capacitors have initial voltages as shown in the above circuit. Att-0,...
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt...
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt + 15°) and i(t) = 2 cos(wt – 15°). The reactive power Q in the load is 21. An electrical load absorbs an average power of 8kW at a leading power factor of 0.8. The reactive power in the load is 22. A balanced Y-connected load with an impedance of 104–30°N? per phase is supplied by a balanced A-connected source with Va = 208/30°V...
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full...
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full load and has rotational losses (windage + friction) of 100 W. The stator resistance per phase is 0.2 Ohm. The results of no-load and locked-rotor tests on this motor are as follows: No-load test Locked-rotor test Line-to-line input voltage: 240 V 45 V Input active power: 1100 W 1300 W Input line current: 10 A 30 A Using the tests data, determine parameters of...
please do 5 and 6 E 100 V 20° R 222 XL 50 Xc 100 5....
please do 5 and 6
E 100 V 20° R 222 XL 50 Xc 100 5. For the circuit above, calculate: a. Total admittance (Y) b. Total conductance (G) c. Total susceptance (B) d. Find IT, IR, IL & IC e. Total Apparent, Reactive & Real Power (S, Q & P) f. Power Factor (pf) g. Draw the complete admittance triangle with G, -JBL +jBc and Yt all shown and quantified. h. Draw the complete phasor diagram with E, I,...
30i. 25 ? 100 ? 160 v 10A ?? 10? Given: The current-controlled dependent voltage source...
30i. 25 ? 100 ? 160 v 10A ?? 10? Given: The current-controlled dependent voltage source in the above figure has a transconductance of 302 Required: Calculate the node voltages, Vi and V2. Solution:
Question 2 A single-phase transformer has the following nameplate ratings: 100 kVA, 7200/240 V and 60 Hz. The following results are obtained from open-circuit and short-circuit tests: Test Open-circuit Short-circuit Voltage 7200 V 250 V Current 0.65 A 13.89 A Real Power Input 425 W 1420 W a) Determine the parameters of this transformer, all referred to the primary side. b) The secondary of this transformer is connected to a load that draws 100% of the rated power at rated...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and
Vs=450 V.
a) Find the voltage at the high-voltage side of the
transformer (Vp).
b) Find the Voltage Regulation and the Efficiency of this
transformer under this load.
Page 2 of
Problem 3 The equivalent circuit of a 22KVA, 11700/450 V, 60Hz, single phase transformer when referred to its low-voltage side is considered in this problem. The transformer is connected to a load. 0.225+j1.12 's ROXO + Up...
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage impedance is (1.2+j 2.0) 2. the low-side leakage impedance is (0.012 ti 0.02) S2, and Xm at the high-side is 1800 2. Neglect the Hysteresis and Eddy current loss resistance Rhe Calculate the input voltage if the output voltage is 240 V (rms). Given the load resistance is 1.5 12 and the power factor is 0.8 (lagging). ཉིས་པ་དེ། དེ་ | ༼ ། ༼། །
15 V 39 k 2 k 1 uF Vi 0.33uF O 2N3904 100 k 6.2 k 510 47 uF = Analytically calculate the Q point parameters, amplifier voltage voltage gain, input and output resistances of the circuit. (assume ß 200, VA VT = 25mV). = 100 V, =
112 mann Is → I 2652 250 20° V(rms) -j100 12 j392 Quiz 12b The load L is the series resistor and inductor in parallel with the capacitor. a) Calculate the rms phasors Vi and IL | Vel= Vrms. Phase angle Vų = ° (Degrees) (smallest negative angle) | IL 1 = Arms Phase angle IL = (Degrees) (smallest negative angle) b) Calculate the average power and magnetizing reactive power absorbed by the (26+j 39) 22 (Ohm) elements. Pavg =...
Capctr05 20Ω Given: The capacitors have initial voltages as shown in the above circuit. Att-0, the switch is closed. equ e Calculate the final voltage, Vi has reached equilibrium the final voltage, V across the capacitor, on the right, and the energy dissipated in the resis or ie, wR by the t me the system across the capacitor on the le Solution Submit these values
Capctr05 20Ω Given: The capacitors have initial voltages as shown in the above circuit. Att-0,...
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt + 15°) and i(t) = 2 cos(wt – 15°). The reactive power Q in the load is 21. An electrical load absorbs an average power of 8kW at a leading power factor of 0.8. The reactive power in the load is 22. A balanced Y-connected load with an impedance of 104–30°N? per phase is supplied by a balanced A-connected source with Va = 208/30°V...
please do 5 and 6
E 100 V 20° R 222 XL 50 Xc 100 5. For the circuit above, calculate: a. Total admittance (Y) b. Total conductance (G) c. Total susceptance (B) d. Find IT, IR, IL & IC e. Total Apparent, Reactive & Real Power (S, Q & P) f. Power Factor (pf) g. Draw the complete admittance triangle with G, -JBL +jBc and Yt all shown and quantified. h. Draw the complete phasor diagram with E, I,...
30i. 25 ? 100 ? 160 v 10A ?? 10? Given: The current-controlled dependent voltage source in the above figure has a transconductance of 302 Required: Calculate the node voltages, Vi and V2. Solution:
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