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A 415 V, 5 kW, 50 Hz, 4-pole, 3-phase wound-rotor induction motor has the following characteristics:
The magnetising current, core losses and rotating losses can be neglected for this question.
The motor is started direct on-line from a 415 V 50 Hz three phase supply.
(a) Calculate the starting current.
(b) Calculate the starting torque.
(c) Discuss how the starting current could be limited for this wound-rotor motor.
(d) If the motor is running at a speed of 1450 rpm, calculate the mechanical output power.
An open test tube at 293 K is filled at the bottom with 24.2 cm of Hg, and 11.2 cm of water is placed above the Hg. Calculate the pressure at the bottom of the test tube if the atm
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