Korail Class 311000

Korail Class 311000
Class 311000 (1st generation) train 311-26 (ex-Class 5000 train 5–27) at Cheonan station
In service1996–present
ManufacturerHyundai Rotem (previously Daewoo Heavy Industries, Hyundai Precision & Industries, Rotem)
Constructed
  • 1st generation: 1996–1999
  • 2nd generation: 2002–2004
  • 3rd generation:
    • 1st batch: 2005–2006
    • 2nd batch: 2010, 2012–2014[notes 1]
    • 3rd batch: 2015–2016
  • 4th generation: 2019–2022
  • 5th generation: 2023–present
Refurbished2004–2006 Class 319000 & Class 321000: 2008 (trains 5–19, 5–79~5–80, & 5–86~5–92)
Number built1125
  • 1st generation: 415
  • 2nd generation: 240
  • 3rd generation: 454[notes 1]
  • 4th generation: 120
  • 5th generation: 410
Number in service
Number scrapped
  • 409 (1st generation trains)
Formation10 cars per train
TC-M-M'-T-M-T'-T-M-M'-TC
Fleet numbersTrains 311-01~312-00 (formerly trains 5-01~5–92)
OperatorsKorail
DepotsGuro, Byeongjeom, Imun, Siheung
Lines servedSeoul Subway Line 1
Specifications
Car body constructionSteel
Car length19.6 m (64 ft 4 in)
Width3.12 m (10 ft 3 in)
Height3.8 m (12 ft 6 in)
Doors4 per side, 8 per car
Maximum speed110 km/h (68 mph)
Power output4,400 kW (5,900 hp)
Acceleration3.0 km/(h⋅s) (1.9 mph/s)
Deceleration3.5 km/(h⋅s) (2.2 mph/s) (service)
4.5 km/(h⋅s) (2.8 mph/s) (emergency)
Electric system(s)25 kV 60 Hz AC/1.5 kV DC overhead catenary
Current collector(s)Pantograph
Braking system(s)Regenerative
Safety system(s)ATC, ATS
Coupling systemShibata-type
Track gauge1,435 mm (4 ft 8+12 in)

The Korail Class 311000 trains, some train of which were formerly identified as Korail Class 5000 trains, are commuter electric multiple units in South Korea used on Seoul Subway Line 1. Class 311000 trains were manufactured and delivered between 1996 and 2006, and again from 2012 to 2014 to expand service on the Gyeongbu Line and the Gyeongwon Line, and to replace older trains (1st and 2nd batch Class 1000 trains).

As numbering spots in the 311000 series run out, the newest Class 311000 trains have begun to sport numbers in the 312000 series.
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