The Seoul Metro 1000 series VVVF EMU (Korean: 서울교통공사 1000호대 VVVF 전동차) is a third-generation suburban commuter train introduced to replace the aging resistor-controlled 1000 series units on Line 1 of the Seoul Metro. Entering service between October 1998 and May 2002, it comprises ten 10-car sets (1-01–1-10), built in two batches—six sets by Hyundai Precision (1998–1999) and four by Hyundai Rotem (2002).
Equipped for dual-voltage operation (1,500 V DC / 25 kV AC 60 Hz), the series uses Mitsubishi GTO-based VVVF inverters in a 1C4M configuration driving Mitsubishi three-phase AC induction motors. It achieves a top speed of 110 km/h, an acceleration of 3.0 km/h/s, and combines regenerative braking with pneumatic brakes for efficient performance across both electrified sections.
Each set’s 10-car formation is Tc–M–M–T–M–T1–T–M–M–Tc, concentrating auxiliary equipment (SIV, compressors, batteries) in the Tc cars and pantographs/transformers on the motor cars. Interiors feature longitudinal bench seating, LED side- and end-destination displays, and originally installed LED route maps (later removed due to frequent line extensions). Second-batch sets (1-07–1-10) added wheelchair-call handles and refined interior fittings.
The train in your photo, number 1907, corresponds to set 1-07, one of the four Hyundai Rotem–built units delivered in 2002, reflecting the small interior upgrades introduced in that batch.
Suwon Station, Suwon, Gyeonggi, South Korea
Photo Taken: May 05, 2025
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