Dr Aslan Jalal EMII Lecture 18 Indur 33 kW, 60 Hz, star-connected, 4 pole, 1755 rpm 3-0 IM are: R1= 0.2 S2, X1= j0.5 2, Xm= j20 2, R2 = 0.1 2, X, = 0.2 2. If the mechanical losses (windage and friction) are 650 W and iron losses are 300 W, determine the following when the motor operates at full load at rated speed: (a) The synchronous speed. (b) The slip. (c) The input current and power factor. (d) The input power. (e) The useful mechanical power. (f) The output torque. (g) The motor efficiency. Answers: (a) 1800 rpm; (b) 0.025; (c) I, = 57.34 – 21°, 0.93 lag; (d) 36918 W; (e) 33 kW; (f) 179.6 Nm; and (g) 89.4%

Dr Aslan Jalal EMII Lecture 18 Indur 33 kW, 60 Hz, star-connected, 4 pole, 1755 rpm 3-0 IM are: R1= 0.2 S2, X1= j0.5 2, Xm= j20 2, R2 = 0.1 2, X, = 0.2 2. If the mechanical losses (windage and friction) are 650 W and iron losses are 300 W, determine the following when the motor operates at full load at rated speed: (a) The synchronous speed. (b) The slip. (c) The input current and power factor. (d) The input power. (e) The useful mechanical power. (f) The output torque. (g) The motor efficiency. Answers: (a) 1800 rpm; (b) 0.025; (c) I, = 57.34 – 21°, 0.93 lag; (d) 36918 W; (e) 33 kW; (f) 179.6 Nm; and (g) 89.4%

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.1P: Given the complex numbers A1=630 and A2=4+j5, (a) convert A1 to rectangular form: (b) convert A2 to...

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