E331 series

The E331 series (E331系) was an electric multiple unit (EMU) train introduced experimentally from 2007 on commuter services on the Keiyo Line in Japan operated by East Japan Railway Company (JR East). Only one trainset was built, and it differed significantly from other JR commuter EMUs in having articulated cars with shared bogies and using direct-drive motors.[2]

Japanese train type

E331 series

E331 series set AK1 in service on the Keiyo Line in May 2010
In service March 2007–2011
Manufacturer Kawasaki Heavy Industries, Tokyu Car Corporation
Constructed 2006
Scrapped 2014
Number built 14 cars (1 set)
Number scrapped 14 vehicles
Successor E233-5000 series
Formation 14 cars per trainset
Fleet numbers AK1
Operator(s) JR East
Depot(s) Keiyo (Shin-Narashino)
Line(s) served Keiyo Line
Specifications
Car body construction Stainless steel[1]
Car length 13,400 mm (44 ft 0 in) (cars 2-6, 9-13)
16,500 mm (54 ft 2 in) (cars 1, 7, 8, 14)[2]
Width 2,989 mm (9 ft 9.7 in)
Doors 3 pairs per side
Maximum speed 120 km/h (75 mph)
Traction system Variable frequency (IGBT)
Electric system(s) 1,500 V DC overhead catenary
Bogies DT73/TR257/TR258
Safety system(s) ATS-P, ATS-SN
Track gauge 1,067 mm (3 ft 6 in)

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The 14-car set was mounted on a total of 16 bogies: four TR257 trailer bogies (cars 1, 7, 8, 14), six TR258 shared trailer bogies, and six DT73 shared motor bogies.[3]

  • TR257 trailer bogie
  • TR258 shared trailer bogie
  • DT73 shared motor bogie

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