7-18. A 208-V, 60 Hz, six-pole Y-connected 25-hp design class B induction motor is tested in the laboratory, with the following results:
| No load: | 208 V, 22.0 A, 1200 W, 60 Hz |
| Locked rotor: | 24.6 V, 64.5 A, 2200 W, 15 Hz |
| DC test: | 13.5 V, 64 A |
Find the equivalent circuit of this motor, and plot its torque-speed characteristic curve.
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