Homework Answers
We know that
Power = V(ph) x I(ph) x power factor
power factor = 35/(220 x 1.9) = 0.0837
So option (D) is correct.
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Soru 2 Recorded measured values in an no-load test of induction motor experiment for single phase...
03. A 220V single phase induction motor had an input current of 8 amps before the centrifugal switch operated. At t...
03. A 220V single phase induction motor had an input current of 8 amps before the centrifugal switch operated. At that stage the motor operated with a lagging power factor of 0.8. The current in the main winding was 5 amps, and it was lagging the line voltage by 40 degrees. a). Determine the magnitude and phase angle of the current in the auxiliary winding Show your work) b). Draw a neat and clear phasor diagram showing the line current,...
A 220V single phase induction motor had an input current of 8 amps before the centrifugal switch operated. At that...
A 220V single phase induction motor had an input current of 8 amps before the centrifugal switch operated. At that stage the motor operated with a lagging power factor of 0.8. The current in the main winding was 5 amps, and it was lagging the line voltage by 40 degrees Q3 a) Determine the magnitude and phase angle of the current in the auciliary winding Show your work) showing the line current, main winding b) Draw sucat the auxiliary winding...
QUESTION 3 3.1 A single-phase 39 kW, 380 V, 50Hz induction motor operates on full load...
QUESTION 3 3.1 A single-phase 39 kW, 380 V, 50Hz induction motor operates on full load with an efficiency of 89% and at a power factor of 0.809 lagging. Three identical parallel- connected capacitors are used to raise the power factor to 0.96. 3.1.1 Calculate the kVAr rating of the capacitor bank. (9) 3.1.2 Calculate the capacitance of each capacitor. (6) [15]
A 3-phase induction motor draws 28.0 A at no-load and 92.0 A at full-load. The power...
A 3-phase induction motor draws 28.0 A at no-load and 92.0 A at full-load. The power factor of the motor at half-load is most nearly: (A) 0.61 (B) 0.64 (C) 0.71 (D) 0.84
This experiment will give information regarding the behavior of the MUT induction machine under full load...
This experiment will give information regarding the behavior of the MUT induction machine under full load conditions. In this experiment, rather than having a separate mechanical load for the MUT induction machine, the VSD controlled induction machine will act as a mechanical load. The VSD induction machine will act in torque control mode to ensure that a counteracting full load torque is applied to the MUT induction motor. It's rated at 5.5kW. When the motor deliver rated power output, if...
Three-phase induction motor The three-phase induction motor nameplate gives the following informa...
Three-phase induction motor The three-phase induction motor nameplate gives the following information: 100 HP, 6 poles, 600 V, 60 Hz, PF =0.87. Rated motor slip s=0.0275 and rated motor current is 91.7 A. Measured at rated speed friction and ventilation losses are 1100 W. Measured between two motor terminals resistance is 0.305 Ω. f) For a load such where the motor rotates at the speed of 1180 r / min, determine shaft torque and calculate the mechanical power in HP,...
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency...
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency 89% and power factor 0.85 lagging. Calculate: A) The total KVA rating of capacitor required to rise full load power factor to 0.95 lagging. B) What is capacitance per phase if capacitor: 1) Delta connected. 2) Star connected.
Problem Solving: 1. A 220V, 4-pole, 60Hz, 1-phase induction motor has an effective rotor resistance and...
Problem Solving: 1. A 220V, 4-pole, 60Hz, 1-phase induction motor has an effective rotor resistance and leakage reactance of 0.5 Ohms and 5 ohms respectively. It is running at a speed of 1,800 rpm. Determine: a. Frequencies of forward and backward rotor current components b. Relative magnitudes of forward and backward fluxes. Neglect magnetizing current and stator impedance. A 220-W, 2-pole, 115-V, 60-Hz single-phase induction motor delivers rated output at a slip 10%. The total copper loss at full load...
Experiment # 8-Prelab Measurement of Single Phase AC Power by Wattmeter 8.1.The measured current in Figure...
Experiment # 8-Prelab Measurement of Single Phase AC Power by Wattmeter 8.1.The measured current in Figure 8.3 is 10 A and the measured power is 900 W. Consider that the wattmeter is ideal (doesn't change the voltage and current through the load) and determine: a) The resistance of the motor coil (R); b) The inductance of the motor coil (L); c) The power factor of the motor coil (cosp) d) The complex power (S); e) The reactive power (Q): f...
A single-phase, 230 V, 50 Hz, 8 pole, Induction Motor has the following equivalent circuit parameters:...
A single-phase, 230 V, 50 Hz, 8 pole, Induction Motor has the following equivalent circuit parameters: Z1 = 1.7 + j 2.7 Ω ZF = 12 + j 20 Ω ZB = 1.2 + j 2.4 Ω If the core loss is 84 W, while the friction and windage loss is 100 W at 5% slip. Determine: The line current drawn by the machine. (4) The power factor. (1) The input power. (2) The air-gap power. (3) The converted power. ...
03. A 220V single phase induction motor had an input current of 8 amps before the centrifugal switch operated. At that stage the motor operated with a lagging power factor of 0.8. The current in the main winding was 5 amps, and it was lagging the line voltage by 40 degrees. a). Determine the magnitude and phase angle of the current in the auxiliary winding Show your work) b). Draw a neat and clear phasor diagram showing the line current,...
A 220V single phase induction motor had an input current of 8 amps before the centrifugal switch operated. At that stage the motor operated with a lagging power factor of 0.8. The current in the main winding was 5 amps, and it was lagging the line voltage by 40 degrees Q3 a) Determine the magnitude and phase angle of the current in the auciliary winding Show your work) showing the line current, main winding b) Draw sucat the auxiliary winding...
QUESTION 3 3.1 A single-phase 39 kW, 380 V, 50Hz induction motor operates on full load with an efficiency of 89% and at a power factor of 0.809 lagging. Three identical parallel- connected capacitors are used to raise the power factor to 0.96. 3.1.1 Calculate the kVAr rating of the capacitor bank. (9) 3.1.2 Calculate the capacitance of each capacitor. (6) [15]
Problem Solving: 1. A 220V, 4-pole, 60Hz, 1-phase induction motor has an effective rotor resistance and leakage reactance of 0.5 Ohms and 5 ohms respectively. It is running at a speed of 1,800 rpm. Determine: a. Frequencies of forward and backward rotor current components b. Relative magnitudes of forward and backward fluxes. Neglect magnetizing current and stator impedance. A 220-W, 2-pole, 115-V, 60-Hz single-phase induction motor delivers rated output at a slip 10%. The total copper loss at full load...
Experiment # 8-Prelab Measurement of Single Phase AC Power by Wattmeter 8.1.The measured current in Figure 8.3 is 10 A and the measured power is 900 W. Consider that the wattmeter is ideal (doesn't change the voltage and current through the load) and determine: a) The resistance of the motor coil (R); b) The inductance of the motor coil (L); c) The power factor of the motor coil (cosp) d) The complex power (S); e) The reactive power (Q): f...
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