321 series

Japanese train type

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Tōkaidō Main Line, Sanyō Main Line
Kosei Line
Fukuchiyama Line
JR Tōzai Line, Katamachi Line
Yamatoji Line

SpecificationsCar body constructionStainless steelTrain length136.600 m (448 ft 2.0 in)Car length19.55 m (64 ft 2 in) (end cars)^[1]
19.5 m (64 ft 0 in) (intermediate cars)Width2,950 mm (9 ft 8 in)^[1]Height3,630 mm (11 ft 11 in)^[1]Doors4 pairs per sideMaximum speed120 km/h (75 mph)Weight232.8 t (513,236 lb)^[1]Traction systemVariable frequency (2-level IGBT)^[1]Power output270 kW (362 hp)Acceleration2.5 km/(h⋅s) (1.55 mph/s)Deceleration4.2 km/(h⋅s) (2.61 mph/s) (emergency)Electric system(s)1,500 V DC overhead^[1]Current collector(s)WPS27D scissors-type pantographBogiesWDT63 (powered), WTR246/WTR246A (trailer)Braking system(s)Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brakeSafety system(s)ATS-SW, ATS-PTrack gauge1,067 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

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series and 205 series trains on the Tōkaidō Main Line.^[2] One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki derailment of 25 April 2005.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

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

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

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

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.