German engineer Werner von Siemens in 1879 designed the first reliable electric locomotive to carry passengers. Siemens' design used a 2.2kW electric motor and had a top speed of just over 13km/h. This new locomotive hauled three passenger cars along a 300 meter circular railway track and carried about 90,000 people in four months during its trail run at the Berlin Industrial Exhibition. Siemens' electric locomotive was the first train to use a third rail and power was provided by a dynamo built for this purpose. 