Two catenary masts of the Cologne tram seen on the Zollstock branch of line 12
on 26 August 2003. On the left is the old mast, a new one was errected on the
right. The catenary is upgraded for higher currents, to allow unrestricted
operation of 4000 series low-floor trams. In the background, there are catenary
and feeding lines of the DB line Südbrücke-Eifeltor, with a high
voltage line of DB Energie above them. So this is in fact a "3-current-picture"
(750 V DC, 15000 V AC and 110000 V AC).
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>