Electrical_Power_Drivers-_ET3026WB-Chapt15_example_questions

A26 b18 c3 d142 152z1

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Unformatted text preview: r: 1470W Resistance measured between two terminals: 0.5Ω The locked‐rotor test conducted at reduced voltage gave the following results: Locked‐rotor voltage (line‐to‐line): 153V Locked‐rotor power: 7200W Locked‐rotor current: 60A What is the value of x1? a) 2.6Ω. b) 1.8Ω. c) 3Ω. d) 1.42Ω. 15‐2 (Z1) A wye‐connected squirrel‐cage motor having a synchronous speed of 900rpm has a stator resistance of 0.7Ω and an equivalent rotor resistance of 0.5Ω. The total leakage reactance is 5Ω and the line‐to‐neutral voltage is 346V. What is the value of Z1 < α (r1+jx1)? a) 5.05Ω < 82o. x b) 5.02Ω < 84.2o. c) 5Ω < 90o. d) 5Ω < 0o. 15‐2 (nb) A wye‐connected squirrel‐cage motor having a synchronous speed of 900rpm has a stator resistance of 0.7Ω and an equivalent rotor resistance of 0.5Ω. The total leakage reactance is 5Ω and the line‐to‐neutral voltage is 346V. What is the spee...
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This note was uploaded on 02/04/2014 for the course EE 1300 taught by Professor Bauer during the Spring '12 term at High Point.

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