321 series

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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
Operator	JR-West
Depot	Aboshi
Lines served	A Tōkaidō Main Line A Sanyo Main Line B Kosei Line G Fukuchiyama Line H JR Tōzai Line H Katamachi Line Q Yamatoji Line
Specifications
Car body construction	Stainless steel
Train length	136.600 m (448 ft 2.0 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 (229.1 long tons; 256.6 short tons)
Traction system	Variable frequency (2-level IGBT)
Power output	270 kW (362 hp)
Acceleration	2.5 km/(h⋅s) (1.6 mph/s)
Deceleration	4.2 km/(h⋅s) (2.6 mph/s) (emergency)
Electric system	1,500 V DC overhead
Current collection	WPS27D scissors-type pantograph
Bogies	WDT63 (powered), WTR246/WTR246A (trailer)
Braking systems	Regenerative brake, electronically controlled pneumatic brakes, snow-resistant brake
Safety systems	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

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 One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki derailment of 25 April 2005.

Operations

The 321 series share the same assignments as their 207 series counterparts. 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

The 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

External links

Wikimedia Commons has media related to JR West 321.

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