The torque-speed and current-speed curves for a three-phase induction motor with a squirrel cage rotor are shown in figures "A" and "B" of the illustration. Which of the following statements is true concerning the depicted curves? Illustration EL-0056 |
A) The starting current is nearly 1.5 times the normal full load current value. |
B) Starting current is approximately 4.75 times the normal full load current value. |
C) The pull-up point on the torque curve is about 20% of the normal full load torque value. |
D) Rated torque and rated current occur at approximately 20% slip. |