Complex sentence: In order to allow improved acceleration, the Hamburg S-Bahn uses a 1200 volts system; as a consequence, the Berlin and Hamburg S-Bahn rolling stock are not compatible with each other.
Split into simpler sentences: In order to allow improved acceleration, the Hamburg S-Bahn uses a 1200 volts system. As a consequence, the Berlin and Hamburg S-Bahn rolling stock are not compatible with each other.