ALLInterview.com :: Home Page
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   Errors
   Testimonials Refer this Site  Refer This Site to Your Friends  Site Map  Contact Us      
   
 
Categories >> Engineering >> Electrical Engineering
 


 

 
Question What is the d/f between DOL & star delta starter & automatic
star delta starter?
 Question Asked In Companies :: ACC, Dalkia, Indeco, Wipro, Novotel, Engineering, NINL, RMH Control Systems,     < I also faced this Question! >
 Question Submitted By :: ravi
  Answer Posted By  
 
Answer
in induction motor the torque is propotional to squre of
supply voltage in case of dol the motor directly connected
to supply so torque is more while in star delta the motor
is firstly connected to star hence voltage is reduced
torque will be less and when motor reaches its 80% of speed
it connects with delta with the help of timer then full
voltage is supplied hence less rating motor should be
started with dol but for high rating it should be with star
delta

Is This Answer Correct ?    50 Yes 7 No


 
  honey
 
View All Answers
 
 
Please Help Members By Posting Answers For Below Questions
 
 Question Views   Select
 
The capacitive reactance of a capacitor of 1/(2(PI)) F at 10^3 H is 309
define displacement & magnitude ? 260
whats the differece between Exd and Exe 2313
what are problems caused by the pdu in rack server 362
HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com 282
how to determine Sq.mm size of finolex power cables. 383
Why induction motor is widely used in industry 767
What is rms value wher it is used?????????? 440
how electical engineer is related to apsrtc (general) post? if they ask a question in interview as why did u choose this job what shd be answer 358
plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next. 549
what is the difference between electrical choke and electronic choke? 826
Discribe type of fault in DOL and stardelta startor. 544
internally connection of photvoltic module 191
please send me the previous year's question papers of jindal GET exams 4268
What is your acheivements 385
E-Mail New Answers        Answer Selected Questions