Electrical_Power_Drivers-_ET3026WB-Chapt15_example_questions

A315 b33 c183 d199 example151rm

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Unformatted text preview: lts: Locked‐rotor voltage (line‐to‐line): 153V Locked‐rotor power: 7200W Locked‐rotor current: 60A What is the value of Xm? a) 31.5Ω. b) 33Ω. c) 18.3Ω. d) 19.9Ω. Example 15‐1 (Rm) A no‐load test conducted on a 30hp, 835rpm, 440V, 3‐phase, 60Hz squirrel‐cage induction motor shown below yielded the following results: No‐load voltage (line‐to‐line): 440V No‐load current: 14A No‐load power: 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 Rm? a) 146.3Ω. b) 439Ω. c) 131.7Ω. d) 395.1Ω. Example 15‐1 (x1) A no‐load test conducted on a 30hp, 835rpm, 440V, 3‐phase, 60Hz squirrel‐cage induction motor shown below yielded the following results: No‐load voltage (line‐to‐line): 440V No‐load current: 14A No‐load powe...
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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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