KTX-I

KTX-I
KTX-I trainset 24 leaving Daejeon Station
Manufacturer	Alstom (trainsets 01–12) Rotem (trainsets 13–46)
Family name	TGV
Constructed	1997-2000 (trainsets 01–12) 2002-2003 (trainsets 13–46)
Entered service	2004
Number built	46
Number in service	46
Formation	PC+MT+16IT+MT+PC PC: power car (traction head) MT: motorized trailer (passenger car with one bogie powered) IT: intermediate trailer (passenger car)
Capacity	935+30 127 First Class (2+1) 808 Standard Class (2+2) +30 folding seats
Operator(s)	Korail
Depot(s)	Goyang
Line(s) served	Gyeongbu High Speed Railway Honam High Speed Railway Gyeongbu Line Honam Line Gyeongjeon Line Jeolla Line Donghae Line AREX
Specifications
Car body construction	steel
Train length	388.104 m (1,273.31 ft)
Car length	traction heads: 22,607 mm (74 ft 2.0 in) powered passenger cars: 21,845 mm (71 ft 8.0 in) unpowered passenger cars: 18,700 mm (61 ft 4.2 in)
Width	traction heads: 2,814 mm (9 ft 2.8 in) passenger cars: 2,904 mm (9 ft 6.3 in)
Height	traction heads: 4,062 mm (13 ft 3.9 in) powered passenger cars: 4,100 mm (13 ft 5.4 in) unpowered passenger cars: 3,484 mm (11 ft 5.2 in)
Doors	1,835 mm (6 ft 0.2 in) high 700 mm (27.56 in) wide
Maximum speed	service : 305 km/h (190 mph) (orig. 300 km/h (186 mph)) design : 330 km/h (205 mph)
Weight	701 t (690 long tons; 773 short tons) (empty) 771 t (759 long tons; 850 short tons) (max load)
Traction system	12 x SM47 three-phase self-commuting synchronous motors thyristor inverters
Power output	12 x 1,130 kW (1,520 hp) total 13.56 MW (18,180 hp)
Acceleration	from 0 to 300 km/h (0 to 186 mph) in 365 seconds and 20 km (12 mi)
Deceleration	1.04 m/s2 (3.4 ft/s2) from 300 to 0 km/h (186 to 0 mph) in 74 seconds and 3.3 km (2.1 mi)
Auxiliaries	GTO
Power supply	(?)
Electric system(s)	catenary25 kV AC, 60 Hz
Current collection method	pantograph (type: single-arm, Faiveley GPU-25K)
UIC classification	Bo'Bo' + Bo'(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)(2)Bo' + Bo'Bo'
Bogies	Jacobs bogies between intermediate cars
Braking system(s)	regenerative, rheostatic (power system) wheel tread (powered axles) disc (unpowered axles)
Safety system(s)	TVM 430 (ATC), ATS)
Coupling system	Scharfenberg (emergency)
Multiple working	-
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge

PC+MT+16IT+MT+PC

935+30

The KTX-I or simply KTX, also known as TGV-K, is a South Korean high speed train class based on the French TGV Réseau. The 20-car formation of the trainsets without restaurant car is optimized for high capacity. The 46 trainsets were built partly in France and partly in South Korea in the framework of a technology transfer agreement, which was the basis for further domestic high-speed train development in South Korea.

The high-speed rail service of South Korea's national rail carrier Korail, Korea Train Express (KTX), started with the KTX-I. The operational reliability of the trains was improved over time with better maintenance and minor modifications. As of 2011, the KTX-I remains Korail's main workhorse in KTX service with a maximum scheduled speed of 305 km/h (190 mph).

In 1991, bids were called for the supply and technology transfer of the core system technology, encompassing the catenary, signalling and rolling stock, for a South Korean high speed train service. On August 26, 1991, three competitors submitted initial bids: consortia led by GEC-Alsthom (today Alstom), one of the builders of France's TGV/LGV system; Siemens, one of the builders of Germany's ICE; and Mitsubishi, one of the builders of Japan's Shinkansen. After five rounds of evaluation, the French and German consortia submitted final bids on June 15, 1993. The Korea High Speed Rail Construction Authority (KHSRCA) announced that the GEC-Alsthom-led consortium is the preferred bidder on August 20, 1993, and the contract was signed on June 14, 1994.

Part of the core system contract won by GEC-Alsthom and its South Korean subsidiary Eukorail were the first high-speed trains in South Korea, the KTX-I, which were based on the TGV Réseau. The carbody of the first end car was manufactured in January 1996, the first full train was completed and began testing in France in December 1997, and was shipped to South Korea in March 1998. The first test run in South Korea took place in December 1999. In June 2000, the speed of 300 km/h (186 mph) had been achieved, regular testing at that speed started in November 2000, after all of the 12 sets built by Alstom in France have been delivered to South Korea. In line with the core system contract condition that over 50% of the added value has to come from South Korea after technology transfer, the remaining 34 of the 46 trainsets ordered were built under license by Rotem in South Korea itself. The first carbody manufactured in Korea was completed in October 1999, the first complete train was rolled out in April 2002, and all trains were delivered by December 2003.