Osaka Municipal Subway New 20 series

The Osaka Municipal Subway New 20 series (大阪市交通局新20系) is a rapid transit electric multiple unit (EMU) train type operated by Osaka Municipal Subway in Japan since 1990.

Osaka Municipal Subway New 20 series
A line-up of the five different 20 series variants at Midorigi Depot in November 2016
In service1990–present
ManufacturerAlna Kōki, Hitachi Rail Japan, Kawasaki Heavy Industries, Kinki Sharyo, Nippon Sharyo, Tokyu Car Corporation
Replaced30 series
Constructed1990–1998
Entered service25 April 1990
Refurbished2011–
Number built572 vehicles
Number in service572 vehicles
Formation10 cars per trainset (21 series)
6 cars per trainset (22/23/24/OTS series)
4 cars per trainset (25 series)
OperatorsOsaka Municipal Transportation Bureau (1990–2018)
Osaka Metro (2018–present)
DepotsNakamozu (21 series)
Dainichi (22 series)
Midorigi (23 series)
Morinomiya (24/25/OTS series)
Lines served
Specifications
Car body constructionStainless steel
Train length187.4 m (614 ft 10 in) (21 series)
112.6 m (369 ft 5 in) (22/23/24/OTS series)
75.2 m (246 ft 9 in) (25 series)
Car length18.9 m (62 ft 0 in) (end cars)
18.7 m (61 ft 4 in) (intermediate cars)
Width2.89 m (9 ft 6 in) (end cars)
2.88 m (9 ft 5 in) (intermediate cars)
Height3,745 mm (12 ft 3 in)
Doors4 pairs of sliding doors per side
Maximum speed95 km/h (59 mph) (24 series; Kintetsu Keihanna Line)
70 km/h (43.5 mph) (other series)
Traction systemVariable-frequency
Traction motorsFour 140 kW (188 hp) traction motors per motor car
Power output560 kW (751 hp) per motor car
Acceleration3 km/(h⋅s) (1.9 mph/s) (21/24 series)
2.5 km/(h⋅s) (1.6 mph/s) (other series)
Deceleration3.5 km/(h⋅s) (2.2 mph/s)
4.5 km/(h⋅s) (2.8 mph/s) (emergency)
Electric system(s)750 V DC
Current collector(s)Third rail contact shoes
Braking system(s)Electric commanding brake with regenerative brake
Safety system(s)WS-ATC (21/22/23/24/OTS series)
WS-ATC, CS-ATC, ATO (25 series) TASC (21 series)
Track gauge1,435 mm (4 ft 8+12 in)

Variants

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The New 20 series was developed from the earlier 20 series trains introduced on the Chūō Line from 1984.

  •   21 series: 10-car sets used on the Midōsuji Line and the Kita-Osaka Kyuko Railway Namboku Line
  •   22 series: 6-car sets used on the Tanimachi Line
  •   23 series: 6-car sets used on the Yotsubashi Line
  •   24 series: 6-car sets used on the Chūō Line and the Kintetsu Keihanna Line
  •   25 series: 4-car sets used on the Sennichimae Line
  •   OTS series (OTS系): 6-car sets introduced in 1997 on the opening of the Cosmosquare to Osakakō segment of the Chūō Line and owned by Osaka Port Transport System (OTS) [ja], transferred to Tanimachi Line in 2006 and reclassified as 22-50 series

Formation

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Trains are formed as follows.[1]

21 series

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Car No. 1 2 3 4 5 6 7 8 9 10
Designation Tec2 Ma2 Mb2 T T' Ma1' Tbp Mb1 Ma1 Tec1
Numbering 219xx 212xx 213xx 215xx 218xx 214xx 217xx 211xx 210xx 216xx

Car 6 is designated as a women-only car (Weekday only).

22/23/24/OTS series

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Car No. 1 2 3 4 5 6
Designation Tec1 Mb1' T' Mb2 Ma2 Tec2
Numbering 2600 2100 2800 2300 2200 2900

22 series car 3 is designated as a women-only car (Rush hour only).

25 series

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Car No. 1 2 3 4
Designation Tec1 Mb1' Mb2 Tec2
Numbering 256xx 251xx 253xx 259xx

References

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  1. ^ 私鉄車両編成表 2016 [Private Railway Rolling Stock Formations - 2016] (in Japanese). Japan: Kotsu Shimbunsha. 25 July 2016. pp. 154–156. ISBN 978-4-330-70116-5.