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Question 2: A large network supplies a three phase induction motor through a short feeder line. The following data are provided No-load Test Data: ho-load 480 V; Ino-load = SA; Pno-load 1.3 kw Blocke...
Question 2: A large network supplies a three phase induction motor through a shor eeder line....
Question 2: A large network supplies a three phase induction motor through a shor eeder line. The following data are provided No-load Test Data. pRo-load 480 V; /w-loa.-5 A: Pre-loa,-1.3 kW Blocked-rotor Test Data: blocked-rotor-S2 V: /blocked-retor 4 A: Paiored 1.3 kW: frequencyelocked-rotor 25 Hz Stator Resistance: Rstator 0.3529 Ω Supply Feeder Data. Zreeder-(0.1 + j0.56) ถ/mile: Length's 3 miles System Data: Pina.-40 HP; Vsupp,-440 V: Number of poles-4: Slip-2S% 250 W Calculate the maghetizing lmpedance of the three phaso...
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results: Rphase phase-1.1 Ω. No-Load Test: applied voltages of 208 V (line-line, rms), 1a 6.5 A...
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results: Rphase phase-1.1 Ω. No-Load Test: applied voltages of 208 V (line-line, rms), 1a 6.5 A, and Pno load.3 phase 175 W. Blocked-Rotor Test: applied voltages of 53 V (line-line, ms), la18.2 A, and Pblocked,3 phase - 900 W. Estimate the per-phase equivalent circuit parameters.
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results:...
Q6 A 50 hp 440 V three phase induction motor is used to determine the power...
Q6 A 50 hp 440 V three phase induction motor is used to determine the power rating of a load. With the load connected to the motor shaft, the input power is 30.5 KW and the stator current is 34.5 A at rated voltage. The blocked rotor test on the motor yields a current of 44.3 A at 52.5 V and a power input of 2.1 kW. When running with no load at rated voltage, the motor takes 16.3 A...
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the...
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results: Rphase phase-1.1 Ω. No-Load Test: applied voltages of 208 V (line-line, rms), 1a 6.5 A, and Pno load.3 phase 175 W. Blocked-Rotor Test: applied voltages of 53 V (line-line, ms), la18.2 A, and Pblocked,3 phase - 900 W. Estimate the per-phase equivalent circuit parameters.
The following test data apply to a 7.5-hp, three-phase, 220-V, 19-A, 60-Hz, four-pole induction motor with...
The following test data apply to a 7.5-hp, three-phase, 220-V, 19-A, 60-Hz, four-pole induction motor with a double-squirrel-cage rotor of design class C (high-starting-torque, low-starting current type): Test :No-load test at 60 Hz; Applied voltage V - 219 V line-to-line; Average phase current I, nl 5.70 A; Power Pnl -380 W; Test 2: Blocked-rotor test at 15 Hz; Applied voltage V 26.5 V line-to-line; Average phase current lbl 18.57 A; Power Pbl 675 W; Test 3: Average de resistance per...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At st...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
Two tests were performed on a 230-V, 60-Hz, 4-pole, Y-connected, three-phase induction motor and the obtained...
Two tests were performed on a 230-V, 60-Hz, 4-pole, Y-connected, three-phase induction motor and the obtained data are given in the table below. The friction and windage loss is 15 W, and the stator winding resistance between any two lines is 3.96ohm Determine: 1) The equivalent circuit parameters of the motor 3) The motor efficiency at a slip of 8%. No-load test 137 0.43 230 Blocked-rotor test 70 1.18 47 3-phase power input, W Line-line voltage, V
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r,...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r, 0.55 Ω Rotor resistance referred to a stator winding phase: r:-0.51 Ω Stator leakage inductance, L,-4.4 mH Rotor leakage inductance referred to a stator winding phase,1'-4.4 mH Magnetising inductance L-65 mH How many pole pairs has the motor? 12] a. Calculate the nominal power factor of the...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load through short feeder. seree the load line to neutral voltage as reference voltage phase angle zero. 02.1 Q2.2 Q2.3 Q2.4 Draw the equivalent circuit. 10p Calculate the load line-to-neutral voltages and line-to-line voltages. 20p Calculate the delta load currents and feeder currents. 20p Calculate the supply wye connected generator line-to-neutral voltages. Is the obtained values are acceptable? Calculate the generator real and reactive power...
3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all...
3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all pages. Consider the following induction machine THREE-PHASE INDUCTION MOTOR DATA* Ratings Line Voltage 2400 V; 72.17 A; Horsepower-300 hp stator frequency60 Hz Design W Poles -4; **Equivalent Circuit Values (in stator ohms Rated Freq)** R1 0.30000 R2'- 0.47159 X2'-1.73000; Jm2.5000 kg-m sq Thevenin Equivalent Circuit Values: RT-0.28524; slip, speed for max Torque0.1375; Rotational Loss Torque-TRL 0.18689 x (speed in rad/s) Nm X1 -1.73000 Xm67.740...
Question 2: A large network supplies a three phase induction motor through a shor eeder line. The following data are provided No-load Test Data. pRo-load 480 V; /w-loa.-5 A: Pre-loa,-1.3 kW Blocked-rotor Test Data: blocked-rotor-S2 V: /blocked-retor 4 A: Paiored 1.3 kW: frequencyelocked-rotor 25 Hz Stator Resistance: Rstator 0.3529 Ω Supply Feeder Data. Zreeder-(0.1 + j0.56) ถ/mile: Length's 3 miles System Data: Pina.-40 HP; Vsupp,-440 V: Number of poles-4: Slip-2S% 250 W Calculate the maghetizing lmpedance of the three phaso...
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results: Rphase phase-1.1 Ω. No-Load Test: applied voltages of 208 V (line-line, rms), 1a 6.5 A, and Pno load.3 phase 175 W. Blocked-Rotor Test: applied voltages of 53 V (line-line, ms), la18.2 A, and Pblocked,3 phase - 900 W. Estimate the per-phase equivalent circuit parameters.
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results:...
Q6 A 50 hp 440 V three phase induction motor is used to determine the power rating of a load. With the load connected to the motor shaft, the input power is 30.5 KW and the stator current is 34.5 A at rated voltage. The blocked rotor test on the motor yields a current of 44.3 A at 52.5 V and a power input of 2.1 kW. When running with no load at rated voltage, the motor takes 16.3 A...
Question 2: In a 208-V (line-to-line, rms), 60-Hz, 5-kW motor, tests are carried out with the following results: Rphase phase-1.1 Ω. No-Load Test: applied voltages of 208 V (line-line, rms), 1a 6.5 A, and Pno load.3 phase 175 W. Blocked-Rotor Test: applied voltages of 53 V (line-line, ms), la18.2 A, and Pblocked,3 phase - 900 W. Estimate the per-phase equivalent circuit parameters.
The following test data apply to a 7.5-hp, three-phase, 220-V, 19-A, 60-Hz, four-pole induction motor with a double-squirrel-cage rotor of design class C (high-starting-torque, low-starting current type): Test :No-load test at 60 Hz; Applied voltage V - 219 V line-to-line; Average phase current I, nl 5.70 A; Power Pnl -380 W; Test 2: Blocked-rotor test at 15 Hz; Applied voltage V 26.5 V line-to-line; Average phase current lbl 18.57 A; Power Pbl 675 W; Test 3: Average de resistance per...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
Two tests were performed on a 230-V, 60-Hz, 4-pole, Y-connected, three-phase induction motor and the obtained data are given in the table below. The friction and windage loss is 15 W, and the stator winding resistance between any two lines is 3.96ohm Determine: 1) The equivalent circuit parameters of the motor 3) The motor efficiency at a slip of 8%. No-load test 137 0.43 230 Blocked-rotor test 70 1.18 47 3-phase power input, W Line-line voltage, V
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r, 0.55 Ω Rotor resistance referred to a stator winding phase: r:-0.51 Ω Stator leakage inductance, L,-4.4 mH Rotor leakage inductance referred to a stator winding phase,1'-4.4 mH Magnetising inductance L-65 mH How many pole pairs has the motor? 12] a. Calculate the nominal power factor of the...
Question 2: Three phase circuit. (100p) A wye connected generator supplies a delta connected balanced load through short feeder. seree the load line to neutral voltage as reference voltage phase angle zero. 02.1 Q2.2 Q2.3 Q2.4 Draw the equivalent circuit. 10p Calculate the load line-to-neutral voltages and line-to-line voltages. 20p Calculate the delta load currents and feeder currents. 20p Calculate the supply wye connected generator line-to-neutral voltages. Is the obtained values are acceptable? Calculate the generator real and reactive power...
3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all pages. Consider the following induction machine THREE-PHASE INDUCTION MOTOR DATA* Ratings Line Voltage 2400 V; 72.17 A; Horsepower-300 hp stator frequency60 Hz Design W Poles -4; **Equivalent Circuit Values (in stator ohms Rated Freq)** R1 0.30000 R2'- 0.47159 X2'-1.73000; Jm2.5000 kg-m sq Thevenin Equivalent Circuit Values: RT-0.28524; slip, speed for max Torque0.1375; Rotational Loss Torque-TRL 0.18689 x (speed in rad/s) Nm X1 -1.73000 Xm67.740...
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