DR series E 50.4

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EP 247 to EP 252
DR series E 50.4
Factory photo production
Factory photo production
Numbering: upon delivery: pr. EP 247 to EP 252
E 50 47-52
Number: 6th
Manufacturer: mech. BMAG
el. MSW
Year of construction (s): 1924
Retirement: until 1956
Axis formula : 2'D1 '
Gauge : 1435 mm ( standard gauge )
Length over buffers: 15,200 mm
Length: 13,900 mm
Total wheelbase: 11,650 mm
Service mass: 114.2 t
Friction mass: 67.7 t
Top speed: 90 km / h
Hourly output : 1900 kW
Continuous output : 1600 kW
Starting tractive effort: 206 kN
Performance indicator: 16.6 kW / t
Driving wheel diameter: 1250 mm
Impeller diameter: 1000 mm
Power system : 15 kV, 16 2/3 Hz, AC
Power transmission: Overhead line
Number of traction motors: 1
Drive: Connecting rods
Type of speed switch: 15 steps
Control: Contactor control

The locomotives of the DR series E 50.4 were electric locomotives of the Deutsche Reichsbahn for the Silesian network . Initially they were designated EP 247 to EP 252 after the numbering system of the Prussian State Railways , as the Reichsbahn introduced their own system until the 1926th In this they were classified as series E 50.4 with the numbers E 50 47-52 . They were developed as reorders from EP 236 to EP 246 and were delivered in 1924.

history

These 6 locomotives appeared in 1924 as reorders for EP 236 to EP 246, which, in contrast to the predecessor locomotives, were developed by BMAG for the mechanical and MSW for the electrical part. Due to the changed electrical equipment, the main frame had to be lengthened and the maneuverability in curves had to be improved while the engine arrangement was basically the same. In addition, the locomotive had a modified locomotive body compared to the previous locomotives . This was due to the free-standing main transformer with the cooling systems above the Krauss-Lotter frame .

The operating program provided for the same train mass and the same maximum speed as the predecessor locomotive. After initial difficulties with the selected fine adjustment control, the locomotives proved themselves quite well on the Silesian routes . According to the Internet, they should have had better running and cornering behavior than the predecessor locomotives. The E 50 50 was moved to Magdeburg - Rothensee as early as 1926, where it was retired in 1932 after two serious accidents. In 1929 the E 50 47 and E 50 48 were moved to Hall P , while the other three machines came to Magdeburg-Rothensee.

At the end of the war, the E 50 51 and E 50 52 were still in working order and ended up in the DR's dam park . By 1956, it and the three remaining machines also located there were taken out of service and scrapped.

Constructive features

the manufacture of the motor frame required special heavy machine tools

The locomotive was a single frame locomotive with a traction motor and rod drive . The front two running axles were designed as a Krauss-Lotter frame with the first coupling axle . The second and third coupling axles were movably supported on both sides by 20 mm. The fourth coupling axle was fixed in the frame and had weakened wheel flanges. The rear barrel axis was as bites salmon formed and had a side clearance of 80 mm to both sides. The locomotive did not have a fixed wheelbase. She had the single frame drive.

The frame was a panel frame. It was stiffened by the buffer beam, various cross stiffeners and the blind shaft bracket. The locomotive body was a pure sheet metal construction and enclosed the engine room, driver's cabs and the partially and fully clad front end. The driver's cabs were each arranged as a staggered driver's cab in front of the front building, which was reserved on the one hand as space for the later expanded boiler and on the other hand for the main transformer. While the front end for the boiler had a straight front end, that for the main transformer was semicircular. The roof hood was removable over the traction motor, the steam boiler and the main transformer. The Knorr compressed air brake acted on all axles and braked the coupling wheels on both sides and the running wheels on one side.

The main transformer was an oil transformer with forced oil circulation and was housed in the porch above the Krauss-Lotter frame . The traction motor was a 48-pin AC - A series motor with two commutators . It was more powerful than the previous locomotive and could therefore be made a little smaller. It was controlled by the so-called MSW control. This consisted of the travel switch with a manually operated cam switch mechanism and a horizontal fine control. The control had 15 speed steps and several intermediate speed steps. An electropneumatic group of riflemen was used to change the direction of travel.

See also

literature

  • Dieter Bäzold, Günther Fiebig: Railway vehicle archive Part 4: Electric locomotive archive. 6th edition. Transpress Verlag, Berlin 1987, ISBN 3-344-00173-6 .
  • Glanert / Borbe / Richter Reichsbahn electric locomotives in Silesia VGB-Verlag 2015, ISBN 978-3-8375-1509-1 .

Web links

Individual evidence

  1. Internet page about the E 50.4 series at www.zackenbahn.de