Source google image: https://lh3.googleusercontent.com/-odAXoEvLFuY/UyC0CFVRyYI/AAAAAAAADs4/cW63psFg7h4/w668-h673-no/etoile-triangle2.gif
Schéma électrique triangle
Source google image: https://lh3.googleusercontent.com/-odAXoEvLFuY/UyC0CFVRyYI/AAAAAAAADs4/cW63psFg7h4/w668-h673-no/etoile-triangle2.gif