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L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm i, i, R, R, jX m (1-s) S How many times the rated current will the inrush current be when the ASM is started directly? O 3.7473 O 1.2558 O 6.3414 O 8.0815 O 7.1534 O 2.6455 n 4.3763

L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm i, i, R, R, jX m (1-s) S How many times the rated current will the inrush current be when the ASM is started directly? O 3.7473 O 1.2558 O 6.3414 O 8.0815 O 7.1534 O 2.6455 n 4.3763

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm Î, Î, R R, ண jXm R, (1-s) S How many times the rated current will the inrush current be when the ASM is started directly? 3.7473 O 1.2558 6.3414 8.0815 O 7.1534 O 2.6455 4.3763
Transcribed Image Text:L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm Î, Î, R R, ண jXm R, (1-s) S How many times the rated current will the inrush current be when the ASM is started directly? 3.7473 O 1.2558 6.3414 8.0815 O 7.1534 O 2.6455 4.3763
Expert Solution
Step 1

The slip of the three-phase ASM is calculated as shown below: 

Ns=120fPP=4f=50 HzNs=120×504Ns=1500s=Ns-NNsN=1420s=1500-14201500s=0.05333

The rated current is given as: 

Irated=VphZeqVph=2203=127.017 V

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