rudiments of transformer

Hi!

You can check out these links:
 
Things I remember about transformers:
The main purpose of a transformer is to change voltage from one level to another--you can change to a lower or higher voltage as desired.
Power supplied to a transformer must be alternating current--applying DC current gives you noise, smoke and fire...
Transformers for three-phase power must have three distinct windings....
Thanks for a chance to dig back in my memory banks.....
 
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