Red Flag 5000-8/1 class locomotive

Red Flag 5400
Type and origin Power type Electric Builder Kim Chong-t'ae Works North Korea
Specifications Configuration: ​  • UIC Bo'Bo'Bo'  • Commonwealth Bo-Bo-Bo Gauge 1,435 mm (4 ft 8+1⁄2 in) Electric system/s 3,000 V DC Current pickup(s) Pantographs Train brakes rheostatic and straight air brakes Couplers AAR knuckle
Performance figures Power output 3,160 kilowatts (4,240 hp)
Career Operators Korean State Railway Class 붉은기5400 Pulg'ŭn'gi-5400 Number in class ≥25 Numbers 붉은기5399, 붉은기5401 - 붉은기5424

The 5400-series Red Flag-class (붉은기, Pulg'ŭn'gi) is a class of universal mainline electric locomotives built by the Kim Chong-t'ae Electric Locomotive Works for the Korean State Railway.

In 1981, the Korean State Railway took delivery of seven Francorail-MTE CSE26-21 diesel locomotives from France, followed by five more in 1985. Due to oil shortages in the late 1980s and early 1990s, it was decided to develop a new electric locomotive based on these diesels. Like all locomotive development in the DPRK, this work was carried out by the Kim Chong-t'ae Electric Locomotive Works in P'yŏngyang.

Apparently intended as a replacement for the Red Flag 1-class locomotives, these locomotives, of which at least 25 have been built, incorporate components copied from the original French parts. Used for mainline passenger and freight service, thesey produce 3,160 kilowatts (4,240 hp) and are painted in the standard light blue over dark green livery, or its newer light green/dark green variant.