%% 
%%  A DANTE-Edition example
%% 
%%  Example 24-03-79 on page 457.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{129.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-circ}

\begin{document}
\psset{unit=0.7}
\begin{pspicture}(-0.25,0)(4,4)
 \pnode(0,3){A}\pnode(0,0){B}\pnode(4,3){C}\pnode(4,0){D}
 \transformer[dipolestyle=rectangle,primarylabel={prim.},
  secondarylabel={sec.},transformeriprimary,
  transformerisecondary,transformeriprimarylabel=$i_{in}$,
  transformerisecondarylabel=$i_{out}$,intensitycolor=red,
  intensitylabelcolor=red](A)(B)(C)(D){$T$}
\end{pspicture}
\end{document}