Question: 6 - 5 . A 2 0 8 - V , four - pole, 6 0 - Hz , Y - connected wound - rotor

6-5. A 208-V, four-pole, 60-Hz, Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are Rl ~ 0.1000 Xl ~ 0.2100 P mech =500W For a slip of 0.05, ti nd (a) The line CUlTent IL R2 ~ 0.0700 X, ~ 0.2100(b) The stator copper losses P seL (c) The air-gap power PAG X", ~ 10.00 Pc;orc =400 W (d) The power converted from electrical to mechanical form P eony (e) The induced torque 'rind (f) The load torque 'T]oad (g) The overall machine efficiency 71(h) The motor speed in revolutions per minute and radians per secon.If the motor in Problem 6-5 is to be operated on a 50-Hz power system, what must be done to its supply voltage? Why? What will the equivalent circuit component values be at 50 Hz? Answer the questions in Problem 6-5 for operation at 50 Hz with a Slip of 0.05 and the proper voltage for this machine.

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