Draw the circle diagram for a 5.6 kw 400 v 3 phase, 4 pole, 50 Hz slip ring induction motor from the following data No load test 400 v, 6A, 38O W Blocked Rotor Test 110 V, 11 A, 720 W The ratio of stator to rotor turns 2.5, stator %3! resistance per phase is 0.67 ohm and rotor is 0.185 ohm, calculate(a)full load current and power factor. (b)full load torque and maximum torque. (c)maximum power factor and slip at maximum torque. (d)Resistance to be inserted in rotor circuit to give starting torque 170% of full load torque.*

Draw the circle diagram for a 5.6 kw 400 v 3 phase, 4 pole, 50 Hz slip ring induction motor from the following data No load test 400 v, 6A, 38O W Blocked Rotor Test 110 V, 11 A, 720 W The ratio of stator to rotor turns 2.5, stator %3! resistance per phase is 0.67 ohm and rotor is 0.185 ohm, calculate(a)full load current and power factor. (b)full load torque and maximum torque. (c)maximum power factor and slip at maximum torque. (d)Resistance to be inserted in rotor circuit to give starting torque 170% of full load torque.*

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 3PA: You are an electrician working in an industrial plant. A 30-hp three-phase squirrel- cage motor...

See similar textbooks

Similar questions

The deep well pump motor is 50 hp, 3-phase, 4-poles, 230 volts, 60 Hz induction motor, operating at 0.90 efficiency, 0.85 power factor and 3 % slip. Determine the current at which the motor is operating. (a). 112.7 A (b). 122.4 A (c). 120. 5 A (d). 124.7 A
SHOW YOUR COMPLETE SOLUTION, ANSWER MUST BE IN 2 DECIMAL PLACES. SHOW WHAT IS GIVEN AND WHAT IS THE UNKNOWN. A 20KW short shunt generator with a terminal voltage of 250V has armature, series and shunt field winding have resistances of 0.05 ohms, 0.03 ohms and 100 ohms respectively. Calculate the total voltage generated in the armature when the brush drop is 1 V per brush and the feeder resistance is 0.5 ohm.
DC/AC MOTOR (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG EXPLANATIONS NEEDED. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWER.) A 4-pole, 75 kW, 3-phase, Y connected load, 50Hz 440 V synchronous motor operates at rated condition with 0.8 pf leading. The motor efficiency excluding field and stator losses is 95% and Xs = 2.5 ohms. What is the power factor angle? a. -12 degrees b. 45 degrees c. -30 degrees d. -18 degrees
A 50-horsepower, 460V, 60Hz, 3-phase induction motor has a Nameplate Rating of 60 amperes. The nameplate also shows a temperature rise of 30°C. Determine the THHN Cable and TW grounding conductors.
. A 20 kW compound generator works on full load with terminal voltage of 250 V. The armature, series, and shunt windings have resistances of 0.05-ohm, 0.025 ohm, and 100 ohms, respectively. If the machine is connected short shunt, the emf generated is nearest to. (Our subject is Electrical Machines 1 ) (I need a clear answer and solution. Thank you so much)
Use 3 digits accuracy in your answer Q: A 4 pole,400 V, Y-connected ,50 Hz, three-phase induction motor has the following per phase parameters in Ω: R1=R2= 1 ,X1=X2=2 , Xm=50. Find : stator current , power factor, stator copper loss , rotor current ,and rotor copper loss? The speed 1450
A 2200 V, 200 hp, 3-phase delta connected synchronous motor is working on full load at an efficiency 0.88 and 0.8 pf leading. The armature reactance per phase is 5 ohms. Determine the induced emf per phase using the phasor diagram. Neglect resistance draw circuit diagram and principles
According to the stator terms of a 3-phase Star connected 380 V, 5 Hp 50 H, 4-pole 1450 rpm induction motor, Rs= 0.3 ohm, Xs=0.5 ohm, R2= 0.15 ohm, X2=0.3 ohm. The idling power of the motor is 400 W. By drawing the equivalent circuit of the motor, find the power and efficiency taken from the motor when it is running at 1% slip and under full load.
The Induction Motor 3 phase 380 Volt 50 Hz with star connection.Has an induced voltage between the 80 Volt slip ring in the OFF state and the open circuit the Stator is connected to the grid. Has the Rotor Impedance per phase at rest (0.5 + j 3.5) Ohms. and starting Resistance (Front) 4 Ohms per phase. p = 6 poles , slip 4% and Frequency 50 Cps. Note : 3 Phase Electric Motor with Coiled Rotor and Starting Resistance (front) is one of the rotor speed regulators Question : a. the value of RPM rotor ?
The blocked-rotor test was performed on the motor of the following were obtained: line to line voltage =26V; total input current = 32A; input wattmeter readings, W1 = 1430W; W2= -860W. Calculate the equivalent resistance and reactance of the motor referred to stator.
Please answer as soon as possible. 4. Draw the winding connection of a 6 leads out delta connected 3 three phase motor reconnected to operate as wye connected three phase motor. 5. How do you determine if the three phase motor is delta connected having a a)3 leads out and b) 6 leads out? 6. What is the purpose of connecting the 3 phase motor as wye during start up operation before reconnecting it to operate as delta in running operation?
10. Three shunt generators operating in parallel supply a total load current of 2000 amperes. Each machine has a field resistance of 40 ohms and an armature resistance of 0.02 ohm. The emfs generated are 240, 242 and 245 volts respectively. Determine current delivered by each generator.