star and star delta help!

[grw1]

hi, this is my first post on the site, i am currently studying c& g 2330 and we have reached the star and star delta section of the course. for whatever reason i am struggling to get my head around the subject and was hoping someone could shed some light on it as simply as possible. any help would be great before i go insane!! cheers. gary

 

[ghost]

Star Delta is a method of reducing the starting current of large motors.
I have been googling to try and find some easy to understand explanations for you. I found these, if you google star delta you may find more.
http://www.mandc.co.za/pdfs/Star_Delta_Starting_and_Dual_Voltage_Motors_Explained.pdf

http://www.warewind.com.au/media/star_delta_wiring_diagram.gif

Hope this helps

 

[grw1]

thanks for the quick reply i will have a look at them now. thanks again. gary

 

[pushrod]

hi, this is my first post on the site, i am currently studying c& g 2330 and we have reached the star and star delta section of the course.

Are you level 2 or 3 and are you part time or full time? What are you covering at the moment and in what context has star and delta come in?

 

[Mr_yellow]

Are you level 2 or 3 and are you part time or full time? What are you covering at the moment and in what context has star and delta come in?

im studying part time level 2! we just finish unit3 outcome 4 "Describe the basic principles of operation of polyphase systems" where we covered star and delta systems!

 

[pushrod]

Hi, it must be the first time it has come up then and must seem quite confusing - it will keep coming up and will become clearer as you re-visit it. The key things are to remember the relationships between V and I in star and delta. It doesn't figure a great deal in the level 2 exams.

I am posting a link to some info - could be password protected, apologies if it is. (link removed) let me know if it works

Edit : link was protected, sorry - try this instead, two thirds the way down the page there are loads of level 2 multiple choice questions for all the different topics HERE