A three-phase motor is connected to 410 V. The motor is located 900 ft from the power source, and has a starting current of 200 A. The voltage drop to the motor cannot be greater than 5% during starting. What size copper conductors should be connected to the motor?
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- What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a single-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I,II and III b. I only c. I and II only d. II and IIIPlease solve with explanation Not Directly answers:A three phase induction motor take a starting current of 42 ampere when full voltage is apply across in delta connected stator. with the same voltage the current drawn by the star connected motor will be calculate:(A)42A(B)28A(C)21A(D)14AA 110 V, 60 Hz, 6 — pole single phase induction motor 1/3 hp has the following equivalent circuit impedances: RI = 1.52 ohm, R2 = 3.13 ohm and xl =2.10 ohm, x2 =1.56 ohm. Xm=58.2 ohm, The friction, windage and stry losses =16W, the core loss = 35 W. For a slip of 0.05, calculate (a) input current, (b) power factor, (c) developed power, (d) output power, (e) speed (f) in put power (g) air gab power (h) T ind (i) T load (j) efficiency.
- Full load current for 3-phase, 440 volts, 20 HP induction motor will be closer to (a) 5 A (c) 25 A (b) 15 A (d) 35 ARefer to Image. Suppose we apply 160 volts AC to 80 turns of the primary winding but the secondary winding only has 25 turns. What is the turns ratio in this system? Please draw imagesA four-pole induction motor drives a load at 2478 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit Part B Value I = HA Request Answer Submit If the dc-to-ac converter has a power efficiency of 90 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. HÅ Value Units Request Answer ? Units ?
- What is the freq. of a 10-pole alternator when running at 360 rpm? (b) At what speeds should a 6-pole alternator run to yield 25, 30, 50, and 60 cycles per second?Q2: b- Explain how does the three- phase induction motor work? *A 110 V, 60 Hz, 6 – pole single phase induction motor 1/3 hp has the following equivalent circuit impedances: RI = 1.52 ohm, R2 = 3.13 ohm and x1 =2.10 ohm, x2 =1.56 ohm. Xm=58.2 ohm, The Friction, windage and stry losses =16W, the core loss = 35 W, For a slip of 0.05, calculation (a) input current, (b) power factor, (c) developed power, (d) output power, (e) speed (f) in put power (g) air gab power (h) T ind (i) T load 6) efficiency.
- 3.) The time delay fuse using the strict standard rating for 2Ø, 230 V, 7.5 hp SCIM motor is A. 25 A B. 30 A C. 35 A D. Any of the aboveAnswer 3 Questions Q1: Choose the correct answer: 1- In an induction motor, no-load slip is generally- (a) Less than 1% (b) 2% (c) 4% (d) 5% 2- A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor current will be-------- (c) 5Hz (a) 50Hz (b) 25Hz (d) 2Hz 3- The efficiency of 3-phase induction motor is about (a) 100% (b) 80-90% (c) 50-60% (d) Less than 50% 4- A double squirrel-cage induction motor has ---------- (a) Two series winding in stator (b) Two parallel windings in stator (c) Two parallel winding in rotor (d) Two rotors moving in opposite direction 5 The rotor slots are slightly skewed in squirrel cage induction motor to ----- (a) Increase the strength of rotor bars (b) Reduce the magnetic hum and locking tendency of rotor (d) Provide ease of fabrication (c) Economize on the copper to be used 6- Stable operation of an induction motor is ------ (a) Between zero slip and unity slip (b) Between zero slip and slip corresponding to maximum torque (c) Between 6.5…what is the conclusion for the concepts of rotating amature and rotating field in an alternator?