10hp single-phase motor is connected to 240 volts. the motor nameplate indicates a NEMA Code B, a full-load running current of 47.5 amperes, and a temperature rise of 40⁰C. what size copper conductors with THWN insulation should be used to connect this motor?
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- 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 above14/ What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a three-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I and II only b. I,II and III c. II and III d. I onlyA 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.
- 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.a three phase star connected six pole induction motor has the following parameters R1=0.294 ohm,R2=0.144ohm,X1=0.503ohm,X2=0.209ohm Xm=13.25ohm a slip of the motor is 2%. the stator input impedence of the motor is?Q2: b- Explain how does the three- phase induction motor work? *
- generator is 600 RPM, and on load generated voltage is 110 V. Calculate 03) A 4 pole wave wound short shunt compound DC Generator supplies a current of 100 A to a load of 10 KW through a cable of resistance Rcable is hundred times the resistance of one of the armature conductor, given that the series field resistance is 0.02 ohm, shunt field resistance is 200 ohm, flux per nole is 0.3 Web, total number of armature conductors is 120, speed of armature resistance. 1.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 AA three-phase, 60 Hz, squirrel-cage induction motor draws a current of 385 amps per phase and a total active power of 2344 kW when operating at full load from a 4000 volt (line) supply. The corresponding speed is 709.2 rev/min. The stator is star-connected and the resistance between two stator live terminals is 0.1 ohms. The machine has 10 poles, the total iron losses are 23.4 kW and the windage and friction losses are 12 kW. Calculate: (i) the power factor at full load? (ii) the active power supplied to the rotor? (iii) the total I'R losses in the rotor?
- The factors effecting the speed of dc motor are The flux p and the voltage across the armature the voltage across the armature and the applied voltage V The applied voltage V, flux p and the voltage across the armature none of the aboye Indicate whether the following statement are true or false * True False The distance between the beginnings of each cascaded two coils is called commutator PitchA 460 V, 60 Hz, Star connected, 870 r.p.m., Eight poles, Three-Phase Induction Motor has the following per phase parameters: R1 = 0.07, R2 = 0.05, X1 = X2 = 0.2, Xm = 6.5, Draw the exact equivalent circuit and determine the following: VII. Rotor Current VIII. Magnetizing Current10 What type of supply is given to the stator of the three-phase induction motor? a. Three phase supply b. Two phase supply c. Four phase supply d. Single phase supply