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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...
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: 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 short feeder line. The following data are provided No-load Test Data: ho-load 480 V; Ino-load = SA; Pno-load 1.3 kw Blocked-rotor Test Data: Volocked-rotor 52 V; Iblocked-rotor 34 A; Polocked-rotor 1.3 kw: frequencyblocked-Fotor 25 Hz Stator Resistance: Rstator 0.3529 n/mile; Length 3 miles (0.1+j0.56) Supply Feeder Data: Zfeeder HP: v,upply-440 V: Number of poles-4: Slip-2.5%; Ploss- 250 w a. Calculate the magnetizing impedance of the three phase...
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...
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...
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 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...
1. The following test data apply to a 208-V, 6-pole, Y-connected, three-phase induction motor: - No-load...
1. The following test data apply to a 208-V, 6-pole, Y-connected, three-phase induction motor: - No-load test: Power input = 336W, line current = 2A at rated voltage - Blocked-rotor test: Power input = 600W, line current = 20A at the line voltage of 30-V - The friction and windage loss is 36W. The resistance between any two lines is 0.2. Determine: a) The equivalent circuit parameter of the motor. 2. This motor is connected to a distribution feeder. The...
A 3-phase, 208 V, 60 Hz, 30 hp, four-pole induction motor
A 3-phase, 208 V, 60 Hz, 30 hp, four-pole induction motor has the following equivalent circuit parameters. R1 = 0.2 Ω, , , Xm = 12Ω.The rotational loss is 500 W. For a slip of 5%, calculate (a) The motor speed in rpm and radians per sec (b) The current drawn by the motor from the power supply (c) The stator cu-loss (d) The air gap power (e) The rotor cu-loss (f) The shaft power (g)The developed torque and the shaft torque (h) The efficiency of the motor Use...
A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-line voltages of VL = 440 V rms....
A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-line voltages of VL = 440 V rms. This source is connected to a balanced wye-connected load. Each phase of the load consists of a 0.5-H inductance in series with a 50-Ω resistance. Assume that the phase of Van is zero. home / study / engineering / electrical engineering / electrical engineering questions and answers / A Balanced Positive-sequence Wye-connected 60-Hz Three-phase Source Has Line-to-line Voltages ... Question: A balanced positive-sequence wye-connected...
3-A 415-V, 2984 kW, 50-Hz, delta-connected motor gave the following test data No-load test : 415...
3-A 415-V, 2984 kW, 50-Hz, delta-connected motor gave the following test data No-load test : 415 V, 21 A, 1,250 W Locked rotor test 100 V, 45 A, 2,730 W Construct the circle and determine (a) the line current and power factor for rated output (b) slip and efficiency
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: 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 Blocked-rotor Test Data: Volocked-rotor 52 V; Iblocked-rotor 34 A; Polocked-rotor 1.3 kw: frequencyblocked-Fotor 25 Hz Stator Resistance: Rstator 0.3529 n/mile; Length 3 miles (0.1+j0.56) Supply Feeder Data: Zfeeder HP: v,upply-440 V: Number of poles-4: Slip-2.5%; Ploss- 250 w a. Calculate the magnetizing impedance of the three phase...
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...
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...
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
3-A 415-V, 2984 kW, 50-Hz, delta-connected motor gave the following test data No-load test : 415 V, 21 A, 1,250 W Locked rotor test 100 V, 45 A, 2,730 W Construct the circle and determine (a) the line current and power factor for rated output (b) slip and efficiency
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