321 series

321 series
321 series
	321 series set D11 in February 2021
In service	2005–present
Manufacturer	Kinki Sharyo
Built at	Higashiōsaka
Replaced	201 series, 205 series, 207 series (set Z16)
Constructed	2005–2007
Entered service	1 December 2005
Number built	273 vehicles (39 sets)
Formation	7 cars per trainset
Fleet numbers	D1–D39
Operators	JR-West
Depots	Aboshi
Lines served	Tōkaidō Main Line, Sanyō Main Line; Kosei Line; Fukuchiyama Line; JR Tōzai Line, Katamachi Line; Yamatoji Line;
Specifications
Car body construction	Stainless steel
Train length	136.600 m (448 ft 2.0 in)
Car length	19.55 m (64 ft 2 in) (end cars); 19.5 m (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 (513,236 lb)
Traction system	Variable frequency (2-level IGBT)
Power output	270 kW (362 hp)
Acceleration	2.5 km/(h⋅s) (1.55 mph/s)
Deceleration	4.2 km/(h⋅s) (2.61 mph/s) (emergency)
Electric system(s)	1,500 V DC overhead
Current collector(s)	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)

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.

Overview[edit]

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series and 205 series trains on the Tōkaidō Main Line.^[2] One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki derailment of 25 April 2005.

Operations[edit]

The 321 series share the same assignments as their 207 series counterparts.^[3]^[4] All 39 sets are allocated to Aboshi depot.

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) (until 17 March 2023)

Formation[edit]

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					142
Weight	35.1 t	34.1 t	27.3 t	33.3 t	34.1 t	33.3 t	35.6 t

KuMoHa 321 and MoHa 321 cars each have two scissors-type pantographs.

Interior[edit]

Original interior style in June 2010
Interior following changes to seat covers and hanging straps, December 2021
Priority seating and free space, December 2021
LCD passenger information display

References[edit]

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.

^ ^a ^b ^c ^d ^e ^f "Electric Equipment of Series 321 Train" (PDF). toyodenki.co.jp (in Japanese). October 2005. Archived (PDF) from the original on 24 December 2017. Retrieved 8 December 2021.
^ "321系通勤形直流電車の新製投入" [Introducing a new 321 series commuter DC train]. westjr.co.jp (in Japanese). 8 July 2005. Archived from the original on 30 August 2005. Retrieved 8 December 2021.
^ JR電車編成表 [JR train organization table] (in Japanese). Japan: 交通新聞社. 16 November 2016. p. 178. ISBN 9784330737164.
^ 柴田, 東吾 (January 2015). "JR西日本207系の歩みと現状" [Railway Fan]. 鉄道ジャーナル社 (in Japanese). 579: 93.

External links[edit]

Kinki Sharyo information Archived 17 March 2009 at the Wayback Machine (in Japanese)

[toyodenki-1] ^ ^a ^b ^c ^d ^e ^f "Electric Equipment of Series 321 Train" (PDF). toyodenki.co.jp (in Japanese). October 2005. Archived (PDF) from the original on 24 December 2017. Retrieved 8 December 2021.

[2] "321系通勤形直流電車の新製投入" [Introducing a new 321 series commuter DC train]. westjr.co.jp (in Japanese). 8 July 2005. Archived from the original on 30 August 2005. Retrieved 8 December 2021.

[3] JR電車編成表 [JR train organization table] (in Japanese). Japan: 交通新聞社. 16 November 2016. p. 178. ISBN 9784330737164.

[4] 柴田, 東吾 (January 2015). "JR西日本207系の歩みと現状" [Railway Fan]. 鉄道ジャーナル社 (in Japanese). 579: 93.

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