Which of the following is not true of a 3-phase induction motor?

Question

Which of the following is not true of a 3-phase induction motor?

It has an auto transformer starter
Star delta starting may be used
It is self-starting and running windings are required
It is self-starting

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

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AhmedNazir · Accepted Answer · 2022-09-04T04:29:57+06:00

Option 3 : It is self-starting and running windings are required

1) Three-phase induction motor is self-starting whereas the single-phase induction motor is not self-starting

2) It doesn’t require any external device to start

3) It has two main parts namely rotor and stator. The stator is a stationary part and rotor is a rotating part

4) A stator winding is placed in the stator of induction motor and the three-phase supply is given to it. The rotor is connected to the mechanical load through the shaft

5) It has a robust construction

6) Commutators and brush assembly is absent in three-phase induction motor hence armature reaction and brush sparking is less

7) Autotransformer starter and star-delta starters can be used.