{{short description|Japanese train type}} {{Expand Japanese|date=July 2022|topic=transport}}{{Use dmy dates|date=October 2023}} {{Infobox train | name = 321 series | image = Series321-D11.jpg | imagesize = 300px | caption = 321 series set D11 in February 2021 | service = 2005–present | manufacturer = [[Kinki Sharyo]] | factory = Higashiōsaka | family = | replaced = [[201 series]], [[205 series]], [[207 series (JR West)|207 series]] (set Z16) | yearconstruction = 2005–2007 | yearservice = 1 December 2005 | refurbishment = | yearscrapped = | numberconstruction = | numberbuilt = 273 vehicles (39 sets) | numberservice = | numberpreserved = | numberscrapped = | formation = 7 cars per trainset | fleetnumbers = D1–D39 | capacity = | operator = [[JR-West]] | depots = Aboshi | lines = {{plainlist| * {{rcb|JR West|Tokaido|route}} [[Tōkaidō Main Line]] * {{rcb|JR West|San'yo A|route}} [[Sanyo Main Line]] * {{rcb|JR West|Kosei|route}} [[Kosei Line]] * {{rcb|JR West|Fukuchiyama|route}} [[Fukuchiyama Line]] * {{rcb|JR West|JR Tozai|route}} [[JR Tōzai Line]] * {{rcb|JR West|Katamachi|route}} [[Katamachi Line]] * {{rcb|JR West|Yamatoji|route}} [[Yamatoji Line]] }} | carbody = Stainless steel | trainlength = {{convert|136.600|m|ftin|abbr=on}} | carlength = {{convert|19550|mm|ftin|abbr=on}} (end cars)<ref name="toyodenki">{{Cite web|date=October 2005|title=Electric Equipment of Series 321 Train|url=https://www.toyodenki.co.jp/technical-report/pdf/giho112/s11232.pdf|url-status=live|access-date=8 December 2021|website=toyodenki.co.jp|language=ja|archive-url=https://web.archive.org/web/20171224213624/https://www.toyodenki.co.jp/technical-report/pdf/giho112/s11232.pdf |archive-date=24 December 2017 }}</ref><br />{{convert|19500|mm|ftin|abbr=on}} (intermediate cars) | width = {{convert|2950|mm|ftin|abbr=on}}<ref name="toyodenki" /> | height = {{convert|3630|mm|ftin|abbr=on}}<ref name="toyodenki" /> | floorheight = | doors = 4 pairs per side | maxspeed = {{convert|120|km/h|mph|abbr=on}} | weight = {{cvt|232.8|t}}<ref name="toyodenki" /> | acceleration = {{cvt|2.5|km/h/s}} | deceleration = {{cvt|4.2|km/h/s}} (emergency) | traction = [[variable frequency drive|Variable frequency]] (2-level [[insulated gate bipolar transistor|IGBT]])<ref name="toyodenki" /> | poweroutput = {{cvt|270|kW|0}} | transmission = | aux = | powersupply = | hvac = | electricsystem = 1,500 V DC overhead<ref name="toyodenki" /> | collectionmethod = WPS27D scissors-type pantograph | bogies = WDT63 (powered), WTR246/WTR246A (trailer) | brakes = [[Regenerative brake]], [[electronically controlled pneumatic brakes]], snow-resistant brake | safety = ATS-SW, ATS-P | coupling = | multipleworking = | gauge = {{RailGauge|1067mm|lk=on}} }}
The {{nihongo|'''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|Kansai Region]] of Japan.
==Overview== The 321 series was developed from the earlier [[207 series (JR West)|207 series]] to replace the ageing [[201 series]] and [[205 series]] trains on the [[Tōkaidō Main Line]].<ref>{{Cite web|date=8 July 2005|title=321系通勤形直流電車の新製投入|trans-title=Introducing a new 321 series commuter DC train|url=http://www.westjr.co.jp/news/newslist/article/050708a.html|url-status=live|archive-url=https://web.archive.org/web/20050830012749/http://www.westjr.co.jp/news/newslist/article/050708a.html|archive-date=30 August 2005|access-date=8 December 2021|website=westjr.co.jp|language=ja}}</ref> 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 (JR West)|207 series]] counterparts.<ref>{{Cite book|title=JR電車編成表|date=16 November 2016|publisher=交通新聞社|isbn=9784330737164|location=Japan|pages=178|language=ja|trans-title=JR train organization table}}</ref><ref>{{Cite journal|last=柴田|first=東吾|date=January 2015|title=JR西日本207系の歩みと現状|trans-title=Railway Fan|journal=鉄道ジャーナル|language=ja|volume=579|pages=93}}</ref> All 39 sets are allocated to Aboshi depot. * [[Tōkaidō Main Line]] and [[San'yō Main Line|Sanyō Main Line]]: {{STN|Yasu|x|Shiga}} – {{STN|Kakogawa|x}} * [[Fukuchiyama Line]]: {{STN|Osaka|x}} – [[Sasayamaguchi Station|Sasayamaguchi]] * [[JR Tōzai Line]] and [[Katamachi Line]]: [[Amagasaki Station (JR West)|Amagasaki]] – {{STN|Kizu|x|Kyoto}} * [[Osaka Higashi Line]] and [[Kansai Main Line]] ([[Yamatoji Line]]) (until 17 March 2023)
==Formation== {| class="wikitable" |- ! 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 |}
KuMoHa 321 and MoHa 321 cars each have two scissors-type pantographs.
==Interior== <gallery> File:JRW series321 indise.jpg|Original interior style in June 2010 File:JR-Series321 Inside.jpg|Interior following changes to seat covers and hanging straps, December 2021 File:JR-Series321 Inside Priority-seat.jpg|Priority seating and free space, December 2021 File:JR-Series321 Inside LCD.jpg|LCD passenger information display </gallery>
==References== {{refbegin}} * {{cite book |script-title=ja: JR全車両ハンドブック2006 (JR Rolling Stock Handbook 2006)| publisher = Neko Publishing| year = 2006| location = Japan}} * {{cite book |script-title=ja: JR電車編成表 '07冬号 (JR EMU Formations – Winter 2007)| publisher = JRR| date = December 2006| location = Japan| isbn = 978-4-88283-046-7}} {{refend}} {{reflist}}
==External links== {{Commons category}} * [http://www.kinkisharyo.co.jp/pdf/gihou/KSW12/KSW12_p40-43.pdf Kinki Sharyo information] {{Webarchive|url=https://web.archive.org/web/20090317224741/http://www.kinkisharyo.co.jp/pdf/gihou/KSW12/KSW12_p40-43.pdf |date=17 March 2009 }} {{in lang|ja}}
{{JR West rolling stock}}
[[Category:Electric multiple units of Japan]] [[Category:West Japan Railway Company]] [[Category:Train-related introductions in 2005]] [[Category:Kinki Sharyo multiple units]] [[Category:1500 V DC multiple units of Japan]]