Seoul Metro 6000 series

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The Seoul Metro 6000 series is a metro train that was introduced between 1999 and 2000 for Seoul Subway Line 6. Today, 39 eight-car trains (312 cars) operate on Line 6, and 2 eight-car trains (16 cars) run on Line 7.

What they are made of and where they came from
- Trains were built starting at Hyundai Precision’s Changwon plant. After Hyundai Precision, Daewoo Heavy Industries and Hanjin Heavy Industries merged into KOROS in 1999, production continued at the same site.
- The trains use an IGBT-VVVF inverter system for propulsion. Some early cars used a locally developed IGBT inverter, but it had poor regenerative braking performance and was replaced with the original VVVF system in 2005.
- The train’s train control and monitoring system (TCMS) was developed by Hyundai Precision and was designed to network control functions more effectively. It improved braking and service commands and included fault diagnosis and inspection features.

Interior and safety improvements
- After the 2003 Daegu subway fire, all trains received interior material replacements by 2005 to meet stricter safety standards.
- Seats were updated to matte stainless steel, and fire alarms and intercoms were reinforced.
- The emergency door hardware was moved from the top of doors to the bottom near passenger seats.
- Since 2010, flame-retardant seats have been installed in certain areas.
- As part of the SMRT-MALL project, top-of-door travel guides were replaced with LCD displays, broadcasting systems were integrated, and some side information posts and Wi-Fi terminals were removed.

Specifications (key figures)
- Maximum service speed: 80 km/h (design speed 100 km/h)
- Power output: 4,000 kW
- Deceleration: 3.5–4.5 km/h per second
- Safety systems: ATC and ATO