\input{Preambule}%

\begin{document}
\ctikzset{american}%
\begin{tikzpicture}[%
    show background rectangle,%
    tight background,%
    background rectangle/.style={fill=white}%
  ]
  \def\radius{2.3}%
  \def\Radius{3}%
  \ctikzset{bipoles/open/voltage/distance from node/.initial=0.1}%

  % Coordonnées
  \coordinate (A) at (90:\Radius);%
  \coordinate (B) at (330:\Radius);%
  \coordinate (C) at (210:\Radius);%
  \coordinate (A2) at ($(\Radius,\Radius)+(1,0)$);%
  \coordinate (B2) at (A2 |- C);%
  \coordinate (C2) at ($(B2)-(0,1.25)$);%
  \coordinate (C3) at ($(C)-(0,1.25)$);%

  % Nœuds
  \node[above] at (A) {A};%
  \node[above right] at (B) {B};%
  \node[left] at (C) {C};%

  % Lignes
  \draw (A) to[vsourcesin, v^=$\underline{U_{\arm\brm}}$, i>=$\underline{I_{\abrm}}$, *-*] (B) %
  to[vsourcesin, v^=$\underline{U_{\brm\crm}}$, i>=$\underline{I_{\bcrm}}$, *-*] (C) %
  to[vsourcesin, v^=$\underline{U_{\crm\arm}}$, i>=$\underline{I_{\carm}}$, *-*] (A);%
  \draw (A2) to[short,i=$\underline{I_{\arm}}$,*-*] (A);%
  \draw (C) -- (C3);%
  \draw (B2) to[short,i=$\underline{I_{\brm}}$,*-] (B);%
  \draw (C2) to[short,i=$\underline{I_{\crm}}$,*-] (C3);%
\end{tikzpicture}
\end{document}
% Local Variables:
% mode: latex
% TeX-engine: luatex
% TeX-source-correlate-method-active: synctex
% ispell-local-dictionary: "british"
% coding: utf-8
% LaTeX-indent-level: 2
% fill-column: 120
% End:
