Osaka Municipal Subway New 20 series explained

Osaka Municipal Subway New 20 series
Service:	1990–present
Manufacturer:	Alna Kōki, Hitachi Rail Japan, Kawasaki Heavy Industries, Kinki Sharyo, Nippon Sharyo, Tokyu Car Corporation
Replaced:	30 series
Yearconstruction:	1990–1998
Yearservice:	25 April 1990
Refurbishment:	2011–
Numberbuilt:	572 vehicles
Numberservice:	572 vehicles
Formation:	10 cars per trainset (21 series) 6 cars per trainset (22/23/24/OTS series) 4 cars per trainset (25 series)
Operator:	Osaka Municipal Transportation Bureau (1990–2018) Osaka Metro (2018–present)
Depots:	Nakamozu (21 series) Dainichi (22 series) Midorigi (23 series) Morinomiya (24/25/OTS series)
Carbody:	Stainless steel
Trainlength:	187.4m (614.8feet) (21 series) 112.6m (369.4feet) (22/23/24/OTS series) 75.2m (246.7feet) (25 series)
Carlength:	18.9m (62feet) (end cars) 18.7m (61.4feet) (intermediate cars)
Width:	2.89m (09.48feet) (end cars) 2.88m (09.45feet) (intermediate cars)
Height:	3745round=5NaNround=5
Doors:	4 pairs of sliding doors per side
Maxspeed:	95km/h (24 series; Kintetsu Keihanna Line) 701NaN1 (other series)
Acceleration:	(21/24 series) (other series)
Deceleration:	(emergency)
Traction:	Variable-frequency
Traction Motors:	Four 1400NaN0 traction motors per motor car
Poweroutput:	5600NaN0 per motor car
Electricsystem:	750 V DC
Collectionmethod:	Third rail contact shoes
Brakes:	Electric commanding brake with regenerative brake
Safety:	WS-ATC (21/22/23/24/OTS series) WS-ATC, CS-ATC, ATO (25 series)TASC (21 series)

The is a rapid transit electric multiple unit (EMU) train type operated by Osaka Municipal Subway in Japan since 1990.

Variants

The New 20 series was developed from the earlier 20 series (ja:大阪市交通局20系電車) 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, transferred to Tanimachi Line in 2006 and reclassified as 22-50 series

Formation

Trains are formed as follows.^[1]

21 series

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

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

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

Notes and References

1. Book: ja: 私鉄車両編成表 2016 . Private Railway Rolling Stock Formations - 2016 . Kotsu Shimbunsha . 25 July 2016 . Japan . Japanese . 154–156. 978-4-330-70116-5.