DR Class 252

The DR Class 252 (after 1992: DB 156) was the last new development of an electric locomotive for the Deutsche Reichsbahn. It was intended as a supplement to the Class 250, and in further series as a successor to the Class 251 locomotives on the Rübelandbahn (electrified with 25 kV 50 Hz) and as a locomotive for transit traffic with a maximum speed of 160 km/h, which was to be used on the West Berlin-Hannover main line via Berlin-Staaken-Oebisfelde, which was to be expanded. However, the last two projects were never realized. As there was no longer any need for these locomotives with conventional AC technology after the reunification of Germany due to the rapid decline in freight traffic, the order for the first delivery series of 70 locomotives, which had already been completed, was canceled. A total of 350 units were planned to be procured in several delivery series by 1995.

The DR Class 252 (after 1992: DB 156) was the last new development of an electric locomotive for the Deutsche Reichsbahn. It was intended as a supplement to the Class 250, and in further series as a successor to the Class 251 locomotives on the Rübelandbahn (electrified with 25 kV 50 Hz) and as a locomotive for transit traffic with a maximum speed of 160 km/h, which was to be used on the West Berlin-Hannover main line via Berlin-Staaken-Oebisfelde, which was to be expanded. However, the last two projects were never realized. As there was no longer any need for these locomotives with conventional AC technology after the reunification of Germany due to the rapid decline in freight traffic, the order for the first delivery series of 70 locomotives, which had already been completed, was canceled. A total of 350 units were planned to be procured in several delivery series by 1995. The 252 003 and 004 have a Sibas 16 microprocessor control system (Sibas = Siemens Railway Automation System) from Siemens Mobility. The software for this was developed jointly by Siemens and LEW. The main computer and a spare computer are located in the driver's cab rear wall 1. There are also four SIBAS-KLIP stations distributed throughout the locomotive. There is a display in the driver's cab to show operating statuses and to diagnose faults. As part of the last main inspections, the Sibas computers were removed from both machines and they were technically adapted to the other two machines. All four locomotives also received a time-division multiplexed dual traction control system (ZDS). ==References==

Text derived from https://en.wikipedia.org/w/index.php?oldid=1375998945 under CC BY-SA 4.0; modifications have been made.