Electrical Machines
In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

 1/√3, 1/√3
 1/3, 1/√3
 1/√3, 1/3
 1/3, 1/3

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Electrical Machines
In the 3-phase induction motor, the resultant flux is of a constant nature and is

 1/2 times maximum value of flux due to any phase
 3 times maximum value of flux due to any phase
 equal to φm, where φm is the maximum flux due to any phase
 3/2 times maximum value of flux due to any phase

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