The 1941 Class ET 125, later adjusted series 276.0 (DR) or 477 (DBAG), was an electric railcar which traversed the DC-powered S-Bahn in Berlin during 1934/35. It was built in 1936 and 1938. The cars, which were popularly known as banker trains, were rebuilt after World War II and the series ET / EB 166 adapted. Among other things, they lost the more powerful 1949/50 traction motors. From the 1970s, they were included in the modernization program and in series 277 rebuilt (after 1991 477/877), they were used on Berlin's S-Bahn network until 2003.
| DR Class 125 | |
|---|---|
 ET 166 047 (adapted from ET 125) in Erkner | |
| Manufacturer | O&K, Dessauer Waggonfabrik, Wegmann – Wagenkästen; AEG, SSW – elektrischer Teil |
| Constructed | 1934-1935 |
| Scrapped | 2003 |
| Number built | 18 power cars, 18 trailer cars |
| Specifications | |
| Train length | 36.2 m (118 ft 9 in) |
| Maximum speed | 90 km/h (56 mph) |
| Weight | 59 t (58 long tons; 65 short tons) |
| Electric system(s) | 750 V DC third rail |
| Current collector(s) | Contact shoe |
| UIC classification | Bo'Bo'+2'2' |
| Safety system(s) | mechanical train stop |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
These trains were deployed when the section between Potsdamer Ringbahnhof and Wannsee were electrified including the part of Zehlendorf stretch.
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