Keio 8000 series
The 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.
| Keio 8000 series | |
|---|---|
 10-car set 8712 in November 2021 | |
| In service | 1992 – Present |
| Manufacturer | Nippon Sharyo, Tokyu Car Corporation |
| Replaced | 5000 series |
| Constructed | 1992 – 1999, 2009 |
| Entered service | 11 May 1992 |
| Refurbished |
|
| Number built | 245 cars (41 sets + 1 car) |
| Number in service | 244 cars (27 sets) |
| Number scrapped | 1 car (8728(I), accident damage) |
| Formation |
|
| Fleet numbers |
|
| Capacity | 143 (end cars) 154/155 (intermediate cars) |
| Operator(s) | Keio Corporation |
| Depot(s) | Wakabadai, Takahatafudō |
| Line(s) served | KO Keio Line |
| Specifications | |
| Car body construction | Ivory painted steel (cab ends) Stainless steel (body) |
| Car length |
|
| Width |
|
| Height | 4,055 mm (car without pantograph) 4,100 mm (car with pantograph) |
| Entry | Level |
| Doors | 4 pairs of sliding doors per side |
| Wheel diameter | 860 mm[1] |
| Wheelbase | 2,200 mm (motored bogie) 2,100 mm (trailer bogie)[1] |
| Maximum speed |
|
| Weight |
|
| Traction system | As built Hitachi 2-level VVVF (GTO switching device)[2] with Toyo Denki/Hitachi 3-phase squirrel-cage induction motor 10-car sets: 8703, 8705, 8708, 8711, 8713, 8714 8-car sets: 8728, 8731 After refurbishment (since 2013) Hitachi 2-level VVVF (silicon carbide hybrid module: Si-IGBT SiC-SBD switching device)[3] with Hitachi totally enclosed 3-phase squirrel-cage induction motor[2] 10-car sets: 8701, 8702, 8704, 8706, 8707, 8709, 8710, 8712 8-car sets: 8729 (8129-8179 motor group only, from March 2015 until April 2015), 8730 (8030-8080 motor group only, then full set from April 2015) Toshiba 2-level VVVF (IGBT switching device) with Toshiba permanent-magnet synchronous motor 8-car sets: 8721 – 8727, 8729 (8029-8079 motor group only, from March 2015, then full set from April 2015), 8730 (8130-8180 motor group only, until April 2015), 8732, 8733 Note: In April 2015, in order to unify control systems, cars 8130 and 8180 were swapped and renumbered with cars 8129 and 8179 respectively. Hence set 8730 got Hitachi only equipment and set 8729 Toshiba only equipment[2] |
| Power output | 150 kW x4 per motored car |
| Transmission | Motor mounted on bogie frame, Westinghouse-Natal joint, gear wheels (parallel-axis drive) Gear ratio: 85:14 = 6.07 |
| Acceleration | 3.3 km/h/s (after high acceleration modification) 2.5 km/h/s (as built) |
| Deceleration | 3.5 km/h/s (full-service braking) 4.0 km/h/s (emergency braking) |
| Auxiliaries | Electric air compressor Reciprocating type (HS-20D), 2,130 ℓ/min flow rate In most of remodeled 10-car sets: Rotary-screw type (RWS20J), 1,600 ℓ/min flow rate |
| Power supply | Static converter 4/6-car sets: 200 V AC, 130 kVA 8-car sets: 200 V AC, 190 kVA Remodeled 10-car sets: 200 V AC, 250 kVA |
| HVAC | One central rooftop air-cooling unit per car (42,000 kcal/h, 48.84 kW); heaters beneath seats |
| Electric system(s) | 1,500 V DC overhead catenary |
| Current collector(s) |
|
| UIC classification |
|
| Bogies | TS-823A (motored bogie) TS-824 (trailer bogie)[1] Axle box suspension: pedestal swing spring type (axle guard with single spring). Secondary suspension: pneumatic (rubber diaphragm air spring) mounted directly below car body and above bolster Double shoe brake (clasp brake) on all wheels Sets 8732 and 8733 only: TS-1017 (motored bogie) TS-1018 (trailer bogie)[1] Axle box suspension: axle beam type. Secondary suspension: pneumatic (rubber diaphragm air spring), bolsterless One tread brake unit (TBU) per wheel (bogie center side) |
| Braking system(s) | Electronically controlled pneumatic brakes with regenerative braking |
| Safety system(s) | Keio ATC |
| Coupling system | Shibata |
| Headlight type | 2 white headlights, 2 red tail lights and 2 white train type identification lights Sealed beam (as built); LED (present) |
| Track gauge | 1,372 mm (4 ft 6 in) |
| Seating | Seating arrangement (intermediate cars): 4-7-7-7-4 on longitudinal bench seats (440 mm wide, bucket style) |
| Notes/references | |
| The fleet overview showed in traction system section is given as of 12 April 2022 | |
Technical details
- MT ratio
- 0 subseries: 10-car set: 6M4T (six motor cars and four trailer cars; each motor car has four motors)
- 20 subseries: eight-car set: 4M4T
- Motor output: 150 kilowatts (200 hp)
- Gear ratio: 6.07
- Drive mechanism: Parallel cardan
- Traction control system: GTO-VVVF
- Headlights: Sealed beam
- Destination indicators: roller-blind or 3-color LED
- Passenger information displays: 3-color LED (4 per car)
- Seating arrangement (intermediate cars): 4-7-7-7-4 on longitudinal bench seats
Body
The body is stainless steel. The front is steel.
Driver's cab
"T" shape one handle master-controller system. Analog (formerly digital) speedometer. TNS (Train Navigation System).
- Acceleration: 4 notch
- Deceleration: 7 notch + emergency
Formations
As of 1 April 2015, the fleet consists of 14 ten-car sets and 13 eight-car sets (244 vehicles in total), formed as follows.[4]
- c=Driver's cab; T=trailer, M=motor
0-subseries ten-car sets
← Shinjuku Keio-Hachiōji → | |||||||||||
| Designation | Tc | M | M | M | M | T | T | M | M | Tc | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Numbering | 8701 : 8713 | 8001 : 8013 | 8051 : 8063 | 8101 : 8113 | 8151 : 8163 | 8751 : 8763 |
+ | 8801 : 8813 | 8201 : 8213 | 8251 : 8263 | 8851 : 8863 |
| 8714 | 8014 | 8064 | 8114 | 8164 | 8514 | 8564 | 8214 | 8264 | 8864 | ||
20-subseries eight-car sets
← Shinjuku Keio-Hachiōji → | ||||||||
| Designation | Tc | M | M | T | T | M | M | Tc |
|---|---|---|---|---|---|---|---|---|
| Capacity (total) | 143 | 155 | 154 | 154 | 154 | 154 | 154 | 143 |
| Numbering | 8721 : 8733 | 8021 : 8033 | 8071 : 8083 | 8521 : 8533 | 8571 : 8583 | 8121 : 8133 | 8171 : 8183 | 8771 : 8783 |
Interior
Interior of car in original condition
Priority seats of car in original condition
Interior of a refurbished car
Priority seats of a refurbished car
Interior of a renewal car
Priority seats of a renewal car
Driver's cab
Driver's cab with analog speedometer
History
The first 8000 series trains were introduced in 1992.[5]
Six-car and four-cars sets (and occasionally a pair of four-car sets) used to be operated on splitting services which separated and re-joined at Takahatafudō Station until 2006. From 2013 to 2019, all six- and four-car 0-subseries sets underwent a refurbishment program. Among several technical upgrades, the cabs of the two inner ends were removed to form 10-car sets.[5]
The 8000 series trains are used exclusively on Keio Corporation lines. Thus, unlike some other Keio trains, they do not continue past Shinjuku on to the Toei Shinjuku Line.
Set 8705F was involved on the October 2021 Tokyo attack.
Special liveries
Set 8713 received a special all-over green livery in September 2009 evoking the livery carried by the former 2000 series trains.[6]
Set 8713 in special all-over green livery in November 2021
References
 |
Wikimedia Commons has media related to Keio 8000 series. |
- "TS-823A TS-824 ／ 京王電鉄8000系｜台車近影｜鉄道ホビダス" [TS-823A TS-8224 / Keio Electric Railway 8000 series]. rail.hobidas.com (in Japanese). Retrieved 7 October 2021.
- "VVVF名鑑" [VVVF Database]. vvvfdatabase.starfree.jp. Retrieved 7 May 2021.
- "VVVF web plus：日立ハイブリッドSiC".
- 私鉄車両編成表 私鉄車両編成表 2015 [Private Railway Rolling Stock Formations - 2015] (in Japanese). Japan: Kotsu Shimbunsha. 23 July 2015. ISBN 978-4-330-58415-7.
- 私鉄車両年鑑 2013: 大手15社営業用車両完全網羅 私鉄車両年鑑2013 [Japan Private Railways Annual 2013] (in Japanese). Tokyo, Japan: Ikaros Publications Ltd. 20 March 2013. p. 153. ISBN 978-4-86320-693-9.
- 高尾山をイメージしたラッピング車両を運行 [Train to run with wrapping livery with Mt Takao theme] (PDF). News release (in Japanese). Japan: Keio Corporation. 24 September 2015. Archived (PDF) from the original on 6 October 2017. Retrieved 6 October 2017.
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