Siemens SD660
Light rail vehicle
From Wikipedia, the free encyclopedia
The Siemens SD660, originally known as the Siemens SD600,[4] is a double-articulated, 70%-low-floor light rail vehicle (LRV) manufactured by Siemens Transportation Systems. It was the first low-floor light rail vehicle to be used in the United States.[5][6] It first entered service in 1997 with its only operator, TriMet, on the MAX light rail system in Portland, Oregon, United States.
| Siemens SD660 (Types 2 and 3) | |
|---|---|
| |
 Interior of an SD660 | |
| Manufacturer | Siemens |
| Built at | Sacramento, California |
| Constructed | 1996–2005 |
| Entered service | 1997 |
| Number built | 79 |
| Number in service | 79 |
| Successor | Siemens S70/S700 |
| Fleet numbers |
|
| Operators | TriMet |
| Specifications | |
| Car length | 91.93 ft (28.02 m) over couplers |
| Width | 8.71 ft (2.65 m) |
| Height | 13 ft (4.0 m) |
| Floor height |
|
| Low-floor | 70% |
| Entry | Level |
| Doors | 8 per car (4 per side) |
| Articulated sections | 3 |
| Wheelbase | 5.90 ft (1,800 mm) |
| Maximum speed | 55 mph (89 km/h) |
| Weight | 108,000 lb (49 t) |
| Traction system | Siemens IGBT–VVVF[1] |
| Traction motors | 4 × Siemens 175 kW (235 hp) 3-phase AC induction motor |
| Power output | 700 kW (940 hp) |
| Acceleration | 3 mph/s (1.3 m/s2) |
| Deceleration |
|
| Electric system(s) | Overhead line, 750 V DC |
| Current collection | Pantograph |
| UIC classification | Bo′+2′+Bo′ |
| AAR wheel arrangement | B-2-B |
| Minimum turning radius |
|
| Coupling system | Scharfenberg |
| Multiple working |
|
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
History
The initial order placed by TriMet in May 1993 was for 39 cars. It was the first order for low-floor light rail vehicles (LRVs) in North America.[5] The order was subsequently expanded to 46 cars and ultimately to 52.[7] TriMet received the first car, which it numbered 201, in July 1996,[8][9] and the first nine cars entered service on August 31, 1997.[2][3] Siemens retroactively changed the car's model designation from SD600 to SD660, a change relating to its use of AC motors running on 60 Hz instead of DC ones, in 1998.[4] The 52nd car was received by TriMet in April 2000.[10]
TriMet later purchased 27 more SD660s (initially 17 cars, with another 10 added to the order in 2002),[11] which were built between 2003 and 2005. TriMet designated these "Type 3" in its fleet and numbered them 301–327. The last car was delivered in March 2005.[12]
All 79 SD660 cars were originally equipped with rollsign-type destination signs. TriMet replaced the original signs with LED-type signs in a two-year conversion program that lasted from fall 2014[13] to August 2016.[14]
Features
- Bridgeplate wheelchair ramps. These are located at two of the four doorways on each side of an LRV, the two closest to the car's center.[5]
- Bi-directional (or "double-ended"), with operating cabs at both ends[5]
See also
Other Siemens light rail vehicles for the American market:
- Siemens–Duewag U2 – high-floor LRV for either level boarding at high-platform stations or steps for passenger loading at street level
- SD-100 and SD-160 – high-floor LRV for either level boarding at high-platform stations or steps for passenger loading at street level
- SD-400 and SD-460 – high-floor LRV for both level boarding at high-platform stations and with steps for passenger loading at street level
- P2000 – high-floor LRV for level boarding at high-platform stations, custom built for Los Angeles
- S700 and S70 – low-floor LRV for passenger loading at street level
- S200 – high-floor LRV for level boarding at high-platform stations
