Per-Phase Equivalent Circuit of Induction Machine

Given that a 3-phase induction machine (415V, 50Hz, 4 poles) is running at 1485 rpm. Determine the slip of the induction machine at this operating condition.

• 0.99

• 1

• 0.001

• 0.01

What types of tests are required to acquire the equivalent parameters of the per-phase equivalent circuit for an induction machine?

• DC Winding Resistance & Open Circuit Test

• Insulation Resistance Test & Short Circuit Test

• No-load Test & Block Rotor Test

• Open Circuit Test & Short Circuit Test

What is the slip of an induction machine just before the rotor starts to rotate?

• 2

• 1

• 0.5

• 0

What is the slip of an induction machine if no mechanical load is engaged to the shaft of the rotor?

• 2

• 1

• 0.5

• 0

Which parameter is excluded from those associated with the per-phase equivalent circuit of an induction machine?

• Stator winding resistance

• Synchronous reactance

• Magnetizing Inductance

• Rotor winding resistance