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
Manufacturer	Kinki Sharyo
Built at	Higashiōsaka
Replaced	201 series, 205 series, 207 series (set Z16)
Constructed	2005–2007
Entered service	December 2005
Number built	273 vehicles (39 sets)
Formation	7 cars per trainset
Fleet numbers	D1–D39
Operator(s)	JR-West
Depot(s)	Aboshi
Line(s) served	Tōkaidō Main Line, Sanyō Main Line, Kosei Line, Fukuchiyama Line, JR Tōzai Line, Katamachi Line, Osaka Higashi Line, Yamatoji Line
Specifications
Car body construction	Stainless steel
Train length	136,600 mm (448 ft 2 in)
Car length	19,550 mm (64 ft 2 in) (end cars) 19,500 mm (64 ft 0 in) (intermediate cars)
Width	2,950 mm (9 ft 8 in)
Height	3,630 mm (11 ft 11 in)
Doors	4 pairs per side
Maximum speed	120 km/h (75 mph)
Weight	232.8 t
Traction system	Variable frequency (2-level IGBT)
Power output	270 kW
Acceleration	2.5 km/h/s
Deceleration	4.2 km/h/s (emergency)
Electric system(s)	1,500 V DC overhead
Current collection method	WPS27D scissors-type pantograph
Bogies	WDT63 (powered), WTR246/WTR246A (trailer)
Braking system(s)	Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brake
Safety system(s)	ATS-SW, ATS-P
Track gauge	1,067 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 One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki rail crash of 25 April 2005.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

• Tōkaidō Main Line and Sanyō Main Line: Yasu – Kakogawa
• Fukuchiyama Line: Osaka – Sasayamaguchi
• JR Tōzai Line and Katamachi Line: Amagasaki – Kizu
• Osaka Higashi Line and Kansai Main Line (Yamatoji Line): Kizu – Nara, Nara – Kyūhōji – Hanaten

Formation

Car No.	1	2	3	4	5	6	7
Designation	M'c	M	T	M'	M	M'	Mc
Numbering	KuMoHa 320	MoHa 321	SaHa 321	MoHa 320	MoHa 321	MoHa 320	KuMoHa 321
Capacity	142	156	156	156	156	156	142
Weight	35.1 t	34.1 t	27.3 t	33.3 t	34.1 t	33.3 t	35.6 t

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

Interior

• 
  Original interior style in June 2010
• 
  Interior following changes to seat covers and hanging straps, November 2013
• 
  LCD passenger information display

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.

External links

• Kinki Sharyo information (in Japanese)