Amtrak Cities Sprinter
Amtrak Cities Sprinter
Amtrak ACS-64 601 being delivered to Transportation Technology Center, Inc. for testing on June 8, 2013.
|Gauge||1,435 mm (4 ft 8 1⁄2 in)|
|Wheel diameter||1,117 mm (43.98 in) (new), 1,041 mm (40.98 in) (worn)|
|Minimum curve||76 m (249 ft 4.1 in)|
|Wheelbase||9.9 m (32 ft 5.8 in)
(bogie centre distance)
|Length||20.32 m (66 ft 8 in),|
|Width||2,984 mm (9 ft 9.5 in)|
|Height||3,810 mm (12 ft 6 in) (excluding pantograph)|
|Axle load||54,250 lb (24.61 t)|
|Locomotive weight||217,000 lb (98 t)|
|Electric system(s)||12 kV 25 Hz AC Catenary
12.5 kV 60 Hz AC Catenary
25 kV 60 Hz AC Catenary
|Traction motors||Fully Suspended, Siemens built (Norwood, Ohio)|
|Head end power||1 MW (1,300 hp) three phase 60 Hz 480 VAC, 1000 kVA|
|Transmission||Pinion Hollow Shaft Drive w/ Partially Suspended Gearboxes|
|Top speed||125 mph (200 km/h) Service
135 mph (220 km/h) Design
|Power output||6,400 kW (8,600 hp) Maximum
5,000 kW (6,700 hp) Continuous
|Tractive effort||320 kN (72,000 lbf) Starting|
|Locomotive brake||Regenerative braking, NYAB Electro-Pneumatic Cheek Mounted Disk Brakes|
|5,000 kW (6,700 hp) Maximum|
|Safety systems||FRA standards
|Sources:, except where noted|
In October 2010, Amtrak ordered 70 locomotives at a cost of US$466 million, to be delivered beginning in February 2013. In order to comply with "Buy American" laws, the locomotives are being manufactured at Siemens' factory in Florin, California, with traction and electrical equipment being manufactured at Siemens facilities in Norcross and Alpharetta, Georgia.
The locomotives are to operate on the Northeast Corridor (NEC) and the Keystone Corridor and replace the railroad's fleet of AEM-7 and HHP-8 locomotives. Initially, the 20 EMD AEM-7DC units with direct current traction motors will be replaced, then the rebuilt 29 AEM-7ACs with AC propulsion, and lastly the 15 HHP-8 units. The extra six ACS-64 units will be for expansion.
The order was the second part of Amtrak's company-wide fleet-replacement program, after an order for 130 Viewliner II passenger cars was placed in July 2010. On June 30, 2011, US Secretary of Transportation Ray LaHood announced that Amtrak had received a US$562.9 million loan from the federal government's Railroad Rehabilitation and Improvement Financing program for the new locomotives.
Amtrak and Siemens Mobility unveiled the first three completed locomotives on May 13, 2013. They are being tested during summer 2013—two at the Transportation Technology Center in Pueblo, Colorado, and one on the NEC—and will enter revenue service in fall 2013.
As of November 2013, 600-606 are currently being tested.
The design is based on the EuroSprinter and the Vectron platforms, the body is a monocoque structure with integral frames and sidewalls. Significant structural changes to the design were made to comply with American AAR S-580 Locomotive Crashworthiness Requirements including crumple zones, structural strengthening of the cab, and anti-climbing features; resulting in a heavier locomotive than European Eurosprinter/Vectron models.
They are able to operate from 25 kV 60 Hz, 12.5 kV 60 Hz, and 12 kV 25 Hz power supplies, and have a total power of 6.4 megawatts (8,600 hp). The locomotives are designed to be capable of accelerating 18 Amfleet cars to maximum speeds as high as 125 mph (201 km/h) on the Northeast Corridor in a little over eight minutes, with trains of eight Amfleets taking two and a half minutes to reach the same speed. They have advanced safety systems, including specialized couplers designed to keep trains from rolling over, jackknifing, or derailing during a collision. Additionally, the new locomotives are more energy-efficient than those that they replace, and lack dynamic braking grids in favor of 100% regenerative braking, depending on grid receptiveness. Energy generated from the brake may also be utilized to meet HEP needs, further reducing current draw from the grid.
Each locomotive has two electrical converter units with three IGBT based, water cooled output inverters per converter. Two of the inverters power the traction motors; the third unit supplies head-end and auxiliary power. The HEP/auxiliary inverters are dual-redundant and identical (rated 1,000 kW or 1,300 hp), allowing the locomotive to remain in service should one inverter fail en route. The locomotive bogies are fabricated steel designs, with low-lying traction links and center pivot pin. The traction motors are frame-mounted, with torque transmitted via a hollow shaft drive. Locomotive braking is facilitated by cheek mounted disc brakes on each wheel.
- Latour, Michael (September 2011). "A new face in the Northeast Corridor". Railway Gazette International 167 (9).
- "ACS-64 Amtrak Cities Sprinter Electric Locomotive, Northeast and Keystone Corridors". Siemens Industry, Inc. Retrieved June 25, 2013.
- "Highspeed Passenger Locomotive Amtrak Cities Sprinter ACS64". Siemens Mobility. Archived from the original on February 22, 2012. Retrieved February 23, 2012.
- "DOT Announces $562.9 Million Amtrak Loan for 70 Locomotives to Run on Northeast Corridor". United States Department of Transportation. June 29, 2011.
- "Siemens AG bags $466-mn order from US railroad company Amtrak". domain-b.com. October 29, 2010. Retrieved November 4, 2013.
- Amtrak (February 15, 2011). "PRIIA Specifications for single level cars". Retrieved November 4, 2013.
- "Amtrak orders Siemens 200 km/h Cities Sprinter locomotives". Railway Gazette International. October 29, 2010. Archived from the original on November 1, 2010. Retrieved October 30, 2010.
- Michael Latour (June 2011). "Amtrak ACS-64: Speed, power, efficiency". Railway Age.
- "AMTRAK AWARDS $466 MILLION CONTRACT FOR 70 NEW ELECTRIC LOCOMOTIVES". Amtrak. 29 October 2010.
- "Amtrak contracts Siemens to supply 70 electric locomotives". Progressive Railroading. October 29, 2010. Retrieved October 29, 2010.
- "Amtrak receives $562.9m loan to purchase 70 locomotives for Northeast Corridor". Rail.co. June 30, 2011. Archived from the original on June 30, 2011. Retrieved July 1, 2011.
- Siemens USA. "Siemens Provides First Look at New Amtrak Locomotives". Synaptic Digital. Retrieved November 4, 2013.
- Amtrak (May 13, 2013). "AMTRAK UNVEILS ADVANCED TECHNOLOGY LOCOMOTIVES FOR NORTHEAST SERVICE; Siemens-built equipment to improve reliability, efficiency and mobility". Retrieved November 4, 2013.
- "Siemens breaks into the U.S. long-distance passenger rail market". www.infrasite.net. October 29, 2010. Retrieved October 30, 2010.
- "In-cab video of 601 + 8 Amfleets performing an acceleration test at Pueblo, CO". Youtube.com. August 1, 2013.
- "Amtrak orders 70 new electric locomotives from Siemens". Trains. October 29, 2010. Retrieved October 30, 2010.
|Wikimedia Commons has media related to Siemens ACS-64 locomotives.|
- Official Siemens USA Page on the locomotives; includes locomotive location tracking feature.
- In-cab photo taken at unveiling of locomotives on May 13th, 2013.
- Amtrak blog post detailing unveiling of locomotives on May 13th, 2013.
- Raw footage of high speed testing at Pueblo.