Keio 8000 series

{{short description|Japanese electric multiple unit train type}}

{{Multiple issues|

{{Refimprove|date=November 2015}}

{{Cleanup|date=September 2021|reason=the article is filled with fragmented sentences; also, some portions of the infobox may be more appropriate as part of the article body (MOS:INFOBOXPURPOSE)}}

{{Expand Japanese|date=November 2021|topic=Transport}}

}}

{{Use dmy dates|date=November 2015}}

{{Infobox train

| name = Keio 8000 series

| image = Keio-Series8000-8712.jpg

| imagealt = Keio 8000 series

| imagesize =

| caption = 10-car set 8712 in November 2021

| service = 1992 – Present

| yearservice = 11 May 1992

| manufacturer = Nippon Sharyo, Tokyu Car Corporation

| replaced = 5000 series

| yearconstruction = 1992 – 1999, 2009

| refurbishment = {{plainlist|

• 2013 – 2019 (merging of 4-car and 6-car sets)
• 2013 – Present (traction system replacement)

}}

| yearscrapped =

| numberbuilt = 245 cars (41 sets + 1 car)

| numberservice = 244 cars (27 sets)

| numberpreserved =

| numberscrapped = 1 car (8728(I), accident damage)

| formation = {{plainlist|

• 8/10 cars per trainset (present)
• 4/6/8 cars per trainset (as built)

}}

| fleetnumbers = {{plainlist|

• 8701 – 8714 (10-car sets)
• 8721 – 8733 (8-car sets)
• Previously:
• 8701 – 8714 (6-car sets)
• 8801 – 8814 (4-car sets)

}}

| capacity = 143 (end cars)
154/155 (intermediate cars)

| operator = Keio Corporation

| depots = Wakabadai, Takahatafudō

| carbody = Ivory painted steel (cab ends)
Stainless steel (body)

| carlength = {{plainlist|

• {{convert|20,000|mm|ftin|abbr=on}} (full length)
• {{convert|19,500|mm|ftin|abbr=on}} (body length)

}}

| width = {{plainlist|

• {{convert|2,845|mm|ftin|abbr=on}} (full width)
• {{convert|2,770|mm|ftin|abbr=on}} (body width)

}}

| height = {{convert|4,055|mm|ftin|abbr=on}} (car without pantograph)
{{convert|4,100|mm|ftin|abbr=on}} (car with pantograph)

| floorheight =

| platformheight =

| entrylevelorstep = Level

| doors = 4 pairs of sliding doors per side

| wheeldiameter = {{convert|860|mm|abbr=on}}{{Cite web |title=TS-823A TS-824 ／ 京王電鉄8000系｜台車近影｜鉄道ホビダス |trans-title=TS-823A TS-824 / Keio Electric Railway 8000 series |url=https://rail.hobidas.com/bogie/archives/2008/02/ts823ats824_800.html |access-date=2021-10-07 |website=rail.hobidas.com |language=ja |archive-url=https://web.archive.org/web/20150417065310/https://rail.hobidas.com/bogie/archives/2008/02/ts823ats824_800.html |archive-date=17 April 2015 |url-status=live}}

| wheelbase = {{convert|2,200|mm|abbr=on}} (motored bogie)
{{convert|2,100|mm|abbr=on}} (trailer bogie)

| maxspeed = {{plainlist|

• {{convert|110|km/h|abbr=on}} (service)
• {{convert|120|km/h|abbr=on}} (design)}}

| weight = {{plainlist|

• {{convert|131|t|abbr=on}}(4-car sets)
• {{convert|204|t|abbr=on}} (6-car sets)
• {{convert|259|t|abbr=on}} (8-car sets)

}}

| lines = {{KOLS|KO}} Keio Line

| traction = GTO-VVVF

| poweroutput = {{convert|150|kW|abbr=on}} per motor

| transmission =

| acceleration = {{convert|3.3|km/h/s|abbr=on}} (after high acceleration modification)
{{convert|2.5|km/h/s|abbr=on}} (as built)

| deceleration = {{convert|3.5|km/h/s|abbr=on}} (full-service braking)
{{convert|4.0|km/h/s|abbr=on}} (emergency braking)

| aux =

| hvac =

| electricsystem = 1,500 V DC overhead catenary

| collectionmethod = Pantograph

| uicclass =

| bogies = {{Plainlist|

• TS-823A/TS-824
• TS-1017/TS-1018 (sets 8732 and 8733 only)

}}

| minimum curve =

| brakes = Electronically controlled pneumatic brakes with regenerative braking

| safety = Keio ATC

| coupling = Shibata

| light = Sealed beam

| gauge = {{RailGauge|1372mm|lk=on}}

| notes =

| box_width =

| label_width =

| seating = Longitudinal

}}

The {{Nihongo|Keio 8000 series|京王8000系}} is an electric multiple unit (EMU) train type operated by the private railway operator Keio Corporation on commuter services in the Tokyo area of Japan since 1992.