PKP class EW90

EW90 is the name for German Reichsbahn ET 165 electric multiple units working for Polish State Railways (PKP) after World War II.

History

Berlin S-Bahn ET 165

The German ET 165 units were built in the period between 1928 and 1936 to service Berlin S-Bahn lines. While many units of this type were destroyed during the war, 189 ET 165, ET 166 and ET 167 vehicles were stabled in Schweidnitz (Świdnica), which after 1945 became part of Poland. As part of German reparations 54 were taken over by the PKP and from 1951 to 1957 were refurbished in Lubań as EW90, EW91 and EW92 units to service SKM lines in the Tricity area of Gdańsk, Sopot and Gdynia. It was necessary to rebuilt cars to change power supply from third rail system into pantographs.

EW90 EMUs finished their service in 1976 when power supply on SKM lines changed from 800 V. into 3 000 V.

Technical data

Each unit consisted of two cars: engine car and trailer. It was possible to connect four units in order to gain eight car train.

GBM-700 type electric engines used in EW90, EW91 and EW92 units have 4 main poles and 4 commutation poles. Two-step reduction of engine excitation (up to 50%)is made by short-circuit of parts of main poles. Engines cooling is made with a fan installed on engines' shafts.

Resources

1. EW90 pictures gallery at Chester Home Page, URL accessed on May 4, 2007.
2. EW90, EW91 and EW92 information at Pojazdy Komunikacji, URL accessed on May 4, 2007.

See also

• Polish locomotives designation

Wikimedia Commons has media related to EW90.