explain why reduced voltage starters are required for large tree phase inudcti

explain why reduced voltage starters are required for large
tree phase inudction motor

Question Posted / hashan kavinda

2 Answers
3726 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

explain why reduced voltage starters are required for large tree phase inudction motor..

The main reason for using reduced voltage starters is to
limit the starting current drawn by the motor. This current
can be in excess of 7 times the full load current.

If the current is not limited during starting excessively
large cables must be used and larger transformers etc. to
provide the extra current.

Is This Answer Correct ?

0 Yes

0 No

explain why reduced voltage starters are required for large tree phase inudction motor..

Answer / gopal manda

I would like to explain it by an formula of armature current:
I(Armature)=[V-E(Back EMF)]/R(Armature).
Here "V" is supply voltage and Eb is back emf which is
induced while motor running.If we not decrease starting
voltage the armature current increase very large amount.It
may damage its armature winding and its insulation.Because
at starting of motor RPM is zero so back EMF is also
Zero.That,s why We decrease starting voltage of an induction
motor.

Is This Answer Correct ?

1 Yes

4 No

Post New Answer

More Electrical Engineering Interview Questions

what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

0 Answers Suparco,

Which ciass CT can be use in diff. protection. Can be use 5p20?

5 Answers

what is differentila pilot supervision in the incomer control panel in the power station?

0 Answers

Ohms law explain

1 Answers Hetero,

In electrostatic precipitator why positive terminal of tranformer rectifier unit is grounded?

2 Answers

Why we oil in tranformer/

5 Answers

what is efficient motors and how it is different from normal induction motors

0 Answers Sarthak Contracts,

Why CTs are connected in star on T/F delta connected winding side & in delta on T/F star connected winding side for T/F differential protection?

2 Answers

What is the difference between Droop vs Isoch Control?

0 Answers

Can u start a tube light without a starter?

8 Answers Adani,

one conductor length is L.and i am strech uniformly this conductor and made length is 2L.so resistance of this strech conductor is R=4R..but i want to know about area of stech conductor hows it become a/2..

0 Answers Infosys, ME,

model question paper for supervisor trainee

0 Answers Bhel,

For more Electrical Engineering Interview Questions Click Here