ČSD series T 679.1
| ČSD series T 679.1, T 679.5 ČD / ŽSR series 781 |
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 781,600 of the ČD in the Railway Museum Lužná u Rakovníka
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| Numbering: | ČSD: T 679.1001–1600 T 679.5001–5025 ČD / ŽSR: 781 001–600 781 801–828 |
| Number: | M 679.1: 574 M 679.5: 25 |
| Manufacturer: | Lugansk locomotive factory |
| Year of construction (s): | 1966-1979 |
| Axis formula : | Co'Co ' |
| Gauge : | T 679.1: 1435 mm T 679.5: 1520 mm |
| Length over buffers: | 17,550 mm |
| Height: | 4493 mm |
| Width: | 2950 mm |
| Trunnion Distance: | 8600 mm |
| Smallest bef. Radius: | 125 m |
| Service mass: | 116 t ± 3% |
| Wheel set mass : | 19.3 t ± 3% |
| Top speed: | 100 km / h |
| Installed capacity: | 1471 kW |
| Traction power: | 1271 kW |
| Starting tractive effort: | 260 kN |
| Driving wheel diameter: | 1050 mm |
| Motor type: | Kolomna 14 D 40 |
| Motor type: | Two-stroke twelve-cylinder V-engine |
| Rated speed: | 750 min −1 |
| Power transmission: | electric |
| Brake: | ŠKODA NO Dako-BS-2 |
The ČSD series T 679.1 (from 1988: series 781 ) is a diesel-electric locomotive of the former Czechoslovak State Railways (ČSD) for heavy freight train service. Because of their origin, the locomotives were given the nickname Sergej . Largely structurally identical locomotives ran on the Deutsche Reichsbahn as the class V 200/120 with the nickname Taiga drum .
history
The locomotives were developed and produced from the mid-1960s in the Soviet Voroshilovgrad locomotive factory for use by the railway administrations of the entire Comecon . After the Hungarian State Railways (MÁV) and the Polish State Railways (PKP) had already procured locomotives of this type, the ČSD also decided in favor of such locomotives in the mid-1960s.
In 1966 the first 50 locomotives were delivered to ČSD. By 1979, ČSD had acquired a total of 599 locomotives of this series. Two more locomotives were procured from the Košice steelworks (Východoslovenské železiarne - VSŽ) as works locomotives.
25 locomotives of the first series were put into service with wide gauge as T 679.5 for the cross-border route Haniska u Košic - Maťovce - Tschop / Чоп (Soviet Union, today Ukraine ). After their main line was electrified between 1973 and 1978, they were no longer needed there. Some of these locomotives were therefore switched to the standard gauge. The new numbers T 679.1375 to 1399 were planned (from 1988: 781 375 to 399). However, eight locomotives remained wide-gauge to serve the works connections and received the new class designation 781.8 from 1988. The broad-gauge locomotives were retired and scrapped in 1991. However, in 1993/94 four standard gauge locomotives of more recent year of construction were converted to broad gauge. They received the numbers 781 825 to 828 (781 825 with a second occupation).
The number of locomotives decreased for the first time as early as 1987 when nine locomotives were sold to the Hungarian State Railways MÁV. After 1990, the declining freight traffic and the advancing electrification of the most important main lines made locomotives increasingly superfluous. In 1997, the Sergejs' mission in Slovakia ended. In the Czech Republic, locomotives were initially indispensable for heavy goods traffic on the so-called “Podkrušnohorska magistrála” ( Chomutov – Cheb line ). The last area of application for the locomotives in the Czech Republic was the heavy coal trains from Sokolov to the Arzberg power station in Upper Franconia. This traffic ended on November 30, 2002 with the shutdown of the power plant.
Preserved locomotives
The T 679.1600, which was last put into service, has been preserved as an operational ČD museum locomotive in the Lužná u Rakovníka Railway Museum . In 1999 and 2000, a total of 24 locomotives were sold to the German private railways Prignitzer Eisenbahn (PEG), PBSV and Westfälische Almetalbahn (WAB).
Operational locomotives in the Czech Republic and Slovakia:
- 781 168: Vrútky depot
- 781 312: Bratislava Transport Museum
- 781 529: Letohrad depot
- 781 578: Cheb depot
- 781 600: ČD museum locomotive, Chomutov depot
The three locomotives preserved in the Czech Republic were used in April 2019 in a spectacular action for the endurance test of the renewed bridge on the Pňovany – Bezdružice railway line over the Hracholusky dam .
See also
- List of locomotive and multiple unit series of the ČSD
- List of the ČD locomotive and multiple unit series
- List of locomotive and multiple unit series of the ŽSR
