The Class 341000 cars are arranged in 10-car trains. Details of the car types of each train are listed below: 3410XX - Tc 3411XX - M 3412XX - M' 3413XX - T 3414XX - M' 3415XX - T' 3416XX - T 3417XX - M 3418XX - M' 3419XX - Tc
Electrical parts
Trains 341-01~341-05, 341-08, 341-18~341-23, 341-25, and 341-26 use IGBT controls with passive cooling through a heat pipe, while all other trains use Toshiba GTO-based VVVF controls with active cooling. Power output on the Class 341000 trains is greater than that on the Class 1000 trains. As a result, the trains only utilize five powered cars, as opposed to six powered cars in older Korail metro trains. The trains are also equipped with regenerative braking, which reduces energy consumption and simplifies train inspection.
Interior design
The Class 341000 trains used an ivory-colored interior with a long sheet prior to their overhauls. All trains now use a white interior. LED display monitors are installed on the top of each car. The end cars have a space for wheelchairs.
Cabin
The Class 341000 trains equipped with TGIS use color displays, and service machines can be automatically controlled in TGIS after a refurbishment of these trains in 2005. Dead section notifiers are also installed.
Depot
The Class 341000 trains are stored at the Siheung depot, which is located after Oido Stationon Line 4.
Generations
1st Generation
The first generation of Class 341000 trains were built from 1993 to 1996. The trains used a livery consisting of red and orange stripes when delivered, but after refurbishment, the trains started using the new livery. Because of the flat front ends, the trains are nicknamed "flat face". The trains are numbered 341-01~341-25; the trains were renumbered from trains 2-30~2-46, 2-49, 2-51~2-54, 2-70~2-72. Trains 341-01~341-22 were manufactured from 1993 to 1994 by Daewoo Heavy Industries, Hanjin Heavy Industries, and Hyundai Precision to address the opening of the Gwacheon Line and the Ansan Line and were originally six cars long. Additional cars were built in 1995 by Daewoo Heavy Industries to expand these trains to ten cars. Meanwhile, trains 341-23~341-25 were manufactured in 1996 by Daewoo Heavy Industries to expand the rolling stock on Line 4; they were built with 10 cars each. Trains 341-01~341-07 are expected to be replaced by third generation Class 341000 trains. Train 341-02 was retired in 2018 after it was cannibalized of cars for other metro trains, and many trains currently utilize cars from other Class 341000 trains or from older Class 311000 trains.
2nd Generation
The second generation of Class 341000 trains were built in 1999 by KOROS to address the extension of the Ansan Line section of Line 4 from Ansan Station to Oido Station. The cab ends of the driving cars changed completely into a circular front view, which led to the trains being nicknamed "round face". The trains used a livery consisting of red and orange stripes when delivered, but after refurbishment, the trains started using the new livery. The trains are numbered 341-26~341-30; the trains were renumbered from trains 2-77~2-81.
3rd Generation
The third generation of Class 341000 trains is being built by Hyundai Rotem starting in 2018 to replace the aging first generation trains, which in recent years have been suffering from reliability issues. The trains sport some minor changes, such as the change in the propulsion system. The cab ends of the driving cars changed completely; as a result, railfans nicknamed the trains "주둥이". The trains will be delivered in the new livery. At this time, seven trains, numbered 341-31~341-37, have been delivered and entered service; however, they are temporarily assigned to Line 1 to serve as temporary replacements for aging third generation Class 1000 trains until Line 4 is extended northward. A further 18 trains, tentatively numbered 341-38~341-55, are expected to be manufactured and delivered before 2023; these trains will serve as replacements for aging first generation Class 341000 trains.
Refurbishment
The Class 341000 trains were overhauled from 2003 to 2005. Major and minor refurbishments are listed below.
Overhaul
The Daegu subway fire compelled Korail to introduce flame-resistant interiors for passenger safety. As a result, all trains were overhauled with fire-retardant interiors from 2003 to 2005.
New livery
All trains used an old KNR livery consisting of red and orange stripes. These trains were repainted into the current blue and bluegreen livery from 2003 to 2005. The new livery has a metaphor of Taegeuk, but was criticized as being too primitive-looking. Livery is applied only on front and on the doors.
Electric parts
2002: Trains 341-01~341-25 were retrofitted with Comonet broadcasting systems. They have since been removed.
2004: All trains' braking systems are refurbished to generate less noise.
2004-2005: SIV traction systems were replaced with IGBT traction systems built by Woojin Industrial Systems.
2005: Various new components in all trains are added.
From 2003, some trains had their GTO inverters replaced with IGBT inverters. As of 2018, trains 341-01~341-05, 341-08, 341-18~341-23, 341-25, and 341-26 have received new inverters. From July 2008 all trains were retrofitted with automatic gangway doors. This retrofit included the installation of automatic doors to replace the older doors that were manually pulled open; gangway doors can now be automatically opened by the push of a button. This retrofit process was completed by February 2012. Some trains are now being retrofitted with LED headlights, following the successful testing of LED headlights on the Korail Class 311000 cars.
Renumbering
In 2011, the Class 341000 trains were renumbered from the 2000-series to the 341000-series as a part of a new numbering scheme by Korail. Renumbering was finished by mid-2011.
