8100 series: prototype 8101 and 8102
Siemens and Daewoo Heavy Industries (nowadays Hyundai-Rotem) signed an agreement for a technology transfer, needed to modernize the locomotive fleet of the South-Korean railways, KNR (now Korail). In September 1998, two prototypes were completed in Anyang, South-Korea; unit 8101 and 8102, both painted in white, yellow and blue. The exterior design of the Korail 8100 locomotives is largely based on that of the 152 series locomotives built for the German railways. Mechanically, the main difference with the german version is the modified frame and bogie design, adjusted for the use of center couplings.
The 8101 and 8102 were tested by KNR for a year after delivery. The livery of 8102 has changed in the meanwhile, now being the standard white with blue frames and pink cabs. Of 8101 we are not sure. It got the new logos of Korail, but maybe it still has its orginal livery.
8200 series: 8201-8283
Following the trials with 8101 and 8102, Korail decided to order another a batch of ten locomotives. Daewoo delivered 8201-8210 in 2003. Since then the series has been extended up till at least 83 units, all delivered in the white/blue/pink Korail livery.
A nice image/video report on overhauling a 8200 series locomotive can be found here.
Korail staff is posing together with engineers from Rotem and Siemens for the first series produced electric of the 8200 series.
8500 series: 8501-8587 (originaly planned as 8300 series)
Hyundai-Rotem built 56, 6600 kW Co'Co' electrics for freight services. 31 additional locomotives were ordered in 2012. Toshiba Corporation from Japan delivered the key electrical equipment and systems for these electric locomotives. The exterior design is still much inspired by the previous projects with Siemens.