Korail Class 321000

The Korail Class 321000 trains, created from a assortment of Class 5000, Class 6000, and new cars, are commuter electric multiple units in South Korea used on the Gyeongui·Jungang Line. Class 321000 trains were manufactured and delivered between 2006 - 2009 to provide service on the Jungang Line and to address progressing extensions (starting from the extension to Paldang Station.

Technical details

Electrical parts

All trains use IGBT controls and use passive cooling with a heat pipe. The trains are also equipped with regenerative braking, reducing energy consumption and simplifying train inspection, and they use electric door motors.

Interior design

The Class 321000 trains sport a white-colored interior. LED monitors are installed on the top of each car for trainsets 321-01~321-14, and LCD monitor displays are installed on the side of each car for trainsets 321-15~321-21. The end cars have a space for wheelchairs, and trainsets 321-20~321-21 feature bike racks and retractable seating.

Cabin

The Class 321000 trains share the same cabin design with the Class 311000 as many of the cars are converted Class 311000 trains. Stop notifiers are installed, as are TGIS use color displays. Dead section notifiers are also installed.

Formation

The Class 321000 trains are organized into an TC-M-M'-T-T-M-M'-TC formation. The symbols are defined below.

• M' car: Pantograph, main transformer, controller, motor
• M car: Motor, cotroller
• TC car: Secondary power device, air compressor, battery, cabin
• T car: trailer (unpowered)

The cars of each trainset are numbered to correspond to the type of car each car is: 3210XX - Tc (SIV, air compressor, battery) 3211XX - M (inverter) 3212XX - M' (pantograph, transformer, inverter) 3213XX - T (trailer) 3214XX - T (trailer) 3215XX - M (inverter) 3216XX - M' (pantograph, transformer, inverter) 3219XX - Tc (SIV, air compressor, battery)

Depot

The Class 321000 trains are stored at the Yongmun train depot, which is a few kilometers east of Yongmun Station.

Batches

1st batch

Class 321000 (first batch) trainset 321-03 (ex-Class 5000 trainset 5-88)

The first batch of Class 321000 trains were originally Class 5000 (3rd generation) and Class 6000 trainsets. The trains were renumbered to their current numbers when the Gyeongui·Jungang Line (at the time the Jungang Line) was extended to Paldang Station from Deokso Station. As a result, the first batch Class 321000 trains are exactly identical to the 3rd generation Class 311000 trains.

The first batch trains are numbered 321-01~321-14. Trainsets 321-01~321-07 are former 3rd generation Class 5000 trainsets 5-86~5-92 that built in 2006 and converted in 2008. Trainsets 321-08~321-14, on the other hand, are former Class 6000 trainsets 6-01~6-07 that were also built in 2006 and converted in 2008. Each trainset was shortened down from 10 to eight cars during conversion.

2nd batch

Class 321000 (second batch) trainset 321-18

The second batch of Class 321000 trains were introduced following the Gyeongui·Jungang Line's eastward extension from Paldang to Guksu Station. The second batch trains were formed from the surplus of cars resulting from the shortening of trainsets 321-01~321-14 from 10 to eight cars; 28 cars were left over for an available total of four additional trainsets (4 new cars were made to bring the total amount of available cars to 32 cars, or four 8-car trainsets).

The second batch trains are numbered 321-15~321-18. All trainsets had their overhead LED display monitors replaced with LCD display monitors on the sides (above the doors). Trainset 321-18 uses four newly-made cars due to the lack of available cars for the formation of this trainset.

3rd batch

Class 321000 (third batch) trainset 321-20

The third batch of Class 321000 trains were introduced following the Gyeongui·Jungang Line's eastward extension from Guksu to Yongmun Station. The third batch trains were manufactured and introduced in 2009, few months prior to the opening of the final eastward extension.

The third batch trains are numbered 321-19~321-21. All trainsets were delivered with LCD display monitors on the sides (above the doors), and feature newer exterior LED destination signs that are capable of scrolling. The front end was modified, and has been the blueprint of all subsequent Korail metro cars for the Seoul Metropolitan Subway. Trainsets 321-20~321-21 feature flip-up seats and bike racks.

Refurbishment

Gangway refurbishment

From August 2011, all trainsets gradually received gangway refurbishments (similar refurbishments were also done in Class 311000 trains). Automatic doors were installed to replace the older, manually opened gangway doors. After refurbishment, gangway doors could be automatically opened by the push of a button.

Derived units

Subsequent Korail metro rolling stock trains were created from the same model as the Class 321000 trains, including

• Class 331000 trainsets 331-01~331-13, which use the 3rd batch front end and interior.
• Class 361000 trainsets 361-01~361-13, which use the 3rd batch front end.
• Class 331000 trainsets 331-14~331-27, which use the 3rd batch front end.
• Class 351000 trainsets 351-29~351-43 and 351-61~351-72, which use the 3rd batch front end.

See also

• Korail
• Seoul Subway Line 1
• Gyeongui·Jungang Line

References