Wye Delta Starters

[Toffolon]

Hi Everyone,
I stumbled across this form and was excited to see there is a place for instructors to get help in presenting topic to students. I have been instructing odd classes for about three years, so I am still a young blood.
Now for the question;
I am trying to teach the class about Wye-Delta Starting of Motors and I am stumbling. Does anyone have a Tutorial, PDF File, Instructional Video, or words of wisdom that can help me out?
Thanks in advance,
Alex

 

[whillis]

Here's a start:
http://www.ee.ualberta.ca/~knight/ee332/induction/starting/wye_delta.html

http://www.state-electric.com/files/us-electrical-motors/wye_start_delta_run.pdf

http://www.usmotors.com/products/ProFacts/1-120-7.htm

Any good textbook on electric machines should explain the process in detail, that's where I'd go for the complete explanation.