Answer / deshmukhgs

to avoid burning of the motor because of high curent

Answer / mohsin jamil

because motors start slowly with high torque and bcz of high
torque it needs high amp until it reaches to its full speed..
thats why we use Star connection or start the motor slow so
that motors winding doesn't burn

Answer / muthu kumaran

initially there is no back emf in motor and so current due to the supply voltage flows fully thru the motor.
for EX:230v supply resistance of motor is 0.15ohm -->I=230/0.15=1350.but the rated I is 45A.so that the motot gets damage.so we need to use the starter

Answer / tharan

reduceing for starting current....

Answer / brd ganesh

At the starting time 'EB=0'(back emf) so that
motor draws a 2 to 3 times of its full load current
and which cause to damege the winding. ummm....
That is why using stater to reduse starting current

Answer / simpson

when the motor is in off position the starting winding’s
resistance is 0 ohm .If in this condition 3 Phase 440 v is
directly applied on it the result will b blow of the starting
winding .Hence huge amount of heat will produce .

if we convert kw into Ampers,which one formula use by us,pls tell me?

9 Answers   ABB, Essar,

after applying C-License in how many days we get it?

2 Answers  

which type of effect of turbine and generator reverse power protection ?

0 Answers   NTPC,

Explain the purpose of inductor in an electric circuit?

0 Answers  

Define noise?

0 Answers  

What are types of losses in the Transmisson Lines ?

4 Answers   GE,

what is the responsibility of C license holder in industry?

0 Answers  

what is the use of piston rings in the engine used for a generator...........

0 Answers  

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

0 Answers  

do we convert single phase line to three phase at minimum cost?

1 Answers  

2 Diesel Generators 900KVA connected to the bus bar for essential load as an alternative for power taken from 11/440V 3KVA Transformer supplying this bus bar. my question here is in the event of power failure on 11KV side can I feed the power to 11 KV bus by using the same transformer as reverse feed, what will be the inrush current???

3 Answers   Ashok Leyland,

why mostly conductor made by 7 nos wire?

1 Answers