\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 (A2 |- C);%
  \coordinate (B2) at ($(C2)-(0,1.25)$);%
  \coordinate (B3) at ($(B)-(0,1.25)$);%

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

  % Lignes
  \draw (A) to[generic, v^>=$\underline{V_{\arm}}-\underline{V_{\brm}}$, i_=$\underline{I_{\abrm}}$, *-*] (B) %
  to[generic, v^>=$\underline{V_{\brm}}-\underline{V_{\crm}}$, i_=$\underline{I_{\bcrm}}$, *-*] (C) %
  to[generic, v^>=$\underline{V_{\crm}}-\underline{V_{\arm}}$, i_=$\underline{I_{\carm}}$, *-*] (A);%
  \draw (A2) to[short,i=$\underline{I_{\arm}}$,*-*] (A);%
  \draw (B) -- (B3);%
  \draw (B2) to[short,i=$\underline{I_{\brm}}$,*-] (B3);%
  \draw (C2) to[short,i=$\underline{I_{\crm}}$,*-] (C);%
\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:
