321 series

The 321 series (321系, 321-kei) is a DC electric multiple unit (EMU) commuter train type operated by West Japan Railway Company (JR-West) in the Kansai Region of Japan.

321 series
A 321 series train in April 2011
ManufacturerKinki Sharyo
Built atHigashiōsaka
Replaced201 series, 205 series, 207 series (set Z16)
Constructed20052007
Entered serviceDecember 2005
Number built273 vehicles (39 sets)
Formation7 cars per trainset
Fleet numbersD1–D39
Operator(s)JR-West
Depot(s)Aboshi
Line(s) servedTōkaidō Main Line, Sanyō Main Line, Kosei Line, Fukuchiyama Line, JR Tōzai Line, Katamachi Line, Osaka Higashi Line, Yamatoji Line
Specifications
Car body constructionStainless steel
Train length136,600 mm (448 ft 2 in)
Car length19,550 mm (64 ft 2 in) (end cars)
19,500 mm (64 ft 0 in) (intermediate cars)
Width2,950 mm (9 ft 8 in)
Height3,630 mm (11 ft 11 in)
Doors4 pairs per side
Maximum speed120 km/h (75 mph)
Weight232.8 t
Traction systemVariable frequency (2-level IGBT)
Power output270 kW
Acceleration2.5 km/h/s
Deceleration4.2 km/h/s (emergency)
Electric system(s)1,500 V DC overhead
Current collection methodWPS27D scissors-type pantograph
BogiesWDT63 (powered), WTR246/WTR246A (trailer)
Braking system(s)Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brake
Safety system(s)ATS-SW, ATS-P
Track gauge1,067 mm (3 ft 6 in)

Overview

The 321 series was developed from the earlier 207 series to replace the ageing 201 series and 205 series trains on the Tōkaidō Main Line. One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki rail crash of 25 April 2005.

Operations

Formation

Car No.1234567
Designation M'cMTM'MM'Mc
Numbering KuMoHa 320MoHa 321SaHa 321MoHa 320MoHa 321MoHa 320KuMoHa 321
Capacity 142156156156156156142
Weight 35.1 t34.1 t27.3 t33.3 t34.1 t33.3 t35.6 t

KuMoHa321 and MoHa321 cars each have two scissors-type pantographs.

Interior

References

  • JR全車両ハンドブック2006 (JR Rolling Stock Handbook 2006). Japan: Neko Publishing. 2006.
  • JR電車編成表 '07冬号 (JR EMU Formations - Winter 2007). Japan: JRR. December 2006. ISBN 978-4-88283-046-7.
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