2. A 1100 V, 50 Hz, delta-c transformation ratio of 3-8 per phase respectively. N current at start with slip-ri rotor current at 4% slip w the external resistance per 3. A 4-pole, 3-phase, 50 Hz i ad
2. A 1100 V, 50 Hz, delta-c transformation ratio of 3-8 per phase respectively. N current at start with slip-ri rotor current at 4% slip w the external resistance per 3. A 4-pole, 3-phase, 50 Hz i ad
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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![2. A 1100 V, 50 Hz, delta-connected induction motor has a star-connected slip-ring rotor with a phase
transformation ratio of 3-8. The rotor resistance and standstill leakage reactance are 0-0122 and 0-250
per phase respectively. Neglecting stator impedance and magnetising current, determine (i) the
current at start with slip-rings shorted (ii) the rotor power factor at start with slip-rings shorted
rotor current at 4% slip with slip-rings shorted (iv) the rotor p.f. at 4% slip with slip
the external resistance per phase required to obtain a
rotor
the
shorted (v)
(iii)
rings
A in the stator
supply
starting current of 100
[() 1157 A (it) 0-048.lag (ili) 742-3 A (iv)
lines.
0.77 (v) 0-7072)
3. A 4-pole, 3-phase, 50 Hz induction](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb2ffa8ce-dc49-432c-9401-49cff4b8c004%2Fcbfb0329-b505-4775-a2be-cc8600849617%2Fpdkfrp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. A 1100 V, 50 Hz, delta-connected induction motor has a star-connected slip-ring rotor with a phase
transformation ratio of 3-8. The rotor resistance and standstill leakage reactance are 0-0122 and 0-250
per phase respectively. Neglecting stator impedance and magnetising current, determine (i) the
current at start with slip-rings shorted (ii) the rotor power factor at start with slip-rings shorted
rotor current at 4% slip with slip-rings shorted (iv) the rotor p.f. at 4% slip with slip
the external resistance per phase required to obtain a
rotor
the
shorted (v)
(iii)
rings
A in the stator
supply
starting current of 100
[() 1157 A (it) 0-048.lag (ili) 742-3 A (iv)
lines.
0.77 (v) 0-7072)
3. A 4-pole, 3-phase, 50 Hz induction
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