At the start of the 1990s, ANCeram worked together with ABB-Hentschel, now called ADtranz, to develop a ceramic heat exchanger for power converters in local trains. This "cooling can" provides electrical insulation but uses aluminium nitrites - which are just as effective as aluminium metal - to transport heat from the semiconductor to the water cooling system.
The advantage of this new system is the use of water rather than oil or CFCs for cooling. As well as the ecological benefits, the system is more effective and has lower life-cycle costs than its forerunners.
These new cooling systems have been in use since 1993 in railways in Hamburg, Bilbao, Madrid, Karlsruhe, Hannover and Munich.