A 220-V, 10 Hp, 60 Hz, three phase induction motor having four poles is operating at full load slip of 5%. What is the frequency of the rotor current at starting?
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The synchronous speed \( N_s \) of an induction motor is given by the formula: \[ N_s = \frac{120 \times f}{P} \] where \( f \) is the frequency of the supply (in Hz) and \( P \) is the number of poles. Given: \( f = 60 \) Hz, \( P = 4 \) poles. Plugging in the Show more…
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