Siemens SD-400 and SD-460
| Siemens SD-400/SD-460 LRV | |
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A Siemens SD-460 LRV from Bi-State Transit departs Union Station, on the St. Louis's MetroLink system
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An interior of a Siemens SD-400 operating on the Pittsburgh T system.
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| Manufacturer | Siemens-Duewag AG |
| Constructed |
SD-400: 1985–1993 SD-460: 1999–2005 |
| Number built |
SD-400: 86 SD-460: 68 |
| Operator(s) |
SD-400: Port Authority of Allegheny County Bi-State Development Agency |
| Specifications | |
| Car length | 89.4 feet (27.2 m) |
| Width | 8.7 feet (2.7 m) |
| Height | 12.5 feet (3.8 m) |
| Maximum speed | 65 miles per hour (105 km/h) |
| Weight |
SD-400: 89,560 pounds (40,620 kg) SD-460: 92,500 pounds (42,000 kg) |
| Traction system |
SD-400: Siemens DC-IGBT (x4) SD-460: Siemens AC-IBGT (x4) |
| Power output | 800 hp (597 kW) |
| Electric system(s) | 750 v DC |
| Current collection method | Pantograph |
| AAR wheel arrangement | B-B-B |
| Track gauge |
4 ft 8 1⁄2 in (1,435 mm) (St. Louis, Valencia), 5 ft 2 1⁄2 in (1,588 mm) Pennsylvania Trolley Gauge (Pittsburgh) |
SD-400: 1985–1993
SD-400: 86
SD-400: Port Authority of Allegheny County
Bi-State Development Agency
SD-400: 89,560 pounds (40,620 kg)
SD-400: Siemens DC-IGBT (x4)
The Siemens SD-400 and SD-460 are electric light rail vehicles (LRV) built by Siemens Mobility, a division of Siemens AG. Both models have a common design, with frames built upon a B-B-B truck configuration mounted underneath a double-ended articulated body, which has a seating capacity for 72 people and room for an additional 106 standing passengers. There are four high-level, inward-opening "blinker" doors on each side of the vehicle for level boarding, along with an additional low-level, right-hand side doorway and steps at each end of the vehicle for low-level boarding.
Both the SD-400 and SD-460 are powered by four individual Siemens IGBT electric traction motors with each one developing 200 horsepower (149 kW) and creating a combined total power output of 800 horsepower (597 kW). The older SD-400 uses direct current (DC) motors, while the newer SD-460 uses alternating current (AC) motors. The SD-460 also uses updated electronic equipment compared to the SD-400. On both types, electric current is received via an overhead catenary wire, which supplies 750 volts into the motors.
More than 80 SD-400 units were produced between 1985 and 1993, with all being manufactured at Siemens' primary manufacturing plant at its home base in Germany, while nearly 70 SD-460 units have been produced since 1999, with all being manufactured at Siemens' secondary manufacturing plant at their American base in California as opposed to Germany. The SD-400 is used by the Port Authority of Allegheny County for the Pittsburgh Light Rail in Pennsylvania, while the SD-460 is used for the Valencia Metro in Venezuela. Both types are also used on the St. Louis MetroLink operated by Bi-State Transit in Missouri.
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Wikipedia