ChS7
ChS7[1]
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Electric locomotive ChS7 |
Type and origin |
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Power type |
Electric |
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Builder |
Škoda Works |
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Build date |
1983-1999 |
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Total produced |
321 |
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Performance figures |
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Maximum speed |
160 km/h (99 mph) |
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The ChS7 Russian: ЧС7 is an electric mainline DC passenger locomotive used in Russia and Ukraine. The locomotive consists of two sections (type 2(2O−2O)) and was produced in years 1983 to 1999 at Skoda's V.I. Lenin plant in Plzen, Czech Republic. It was specially developed for the railways of Soviet Union with later models procured by Russian and Ukrainian operators. Along with ChS8, the Chs7 is one of the most powerful electric locomotives used in the countries of the former USSR.
Premise for the appearance
By the early 1980s the ridership of soviet railways reached a significant quantity. It was required to increase the number of passenger trains, which was prevended by an excessively huge freight traffic, and inability to increase passenger capacity of trains by means of increasing the number of cars (30 and more) which could consequently increase the weight to haul. In order to fulfill the last task strong and powerful electric locomotives were required. However, the basis of soviet electric locomotive rolling stock was ChS2 (DC) and ChS4 (AC) electric locomotives, as well as of VL60p (passenger version of VL60). The powere of those electric locomotives was 4200–5100 kW, while a traction force did not exceed 17400 kg, which was not enough for pulling 30-car passenger train.
In addition their design developed back in the 1950s became obsolete. It is worth to mention that, ChS2 control scheme provided the capability of using two units in a Multiple-unit train control mode. However, there were several limitations - e.g. missing capability to restore traction engine protection of "slave" locomotive from leading locomotive. Eventually the multiple unit mode was used only extremely rarely.
- Since 1971—1972 V.I. Lenin plant in Plzen started to produce various modifications of ChS2T and ChS4T locomotives. In comparison to their prototypes, those locos were different by a better design, in addition ChS2T was even stronger than its prototype; however their traction force was not sufficient.
- Besides, starting with the second half of the 1970s the party of ChS6 8-axle DC electric locomotives were in use on Oktyabrskaya Railway. These electric locomotives were created on basis of high speed Chs200 locos by means of changing the transition number of traction reductors, while the total power of their engines were 8400 kW.
- However these electric locomotives were not appropriate for pulling heavyweight passenger trainsв, since the dis-congruence between traction engine power and chain weight (164 tons) did not allow to increase the traction force significantly. IN additions Chs6 locos had only two economical speeds 2 which made their speed range, yet limited. This fashion, their construction required further improvements
- This is the way the SKODA plant in Czechoslovakia (formerly V.I.Lenin plant) in 1980s received an order for building strong and powerful passenger electric locomotives, which were able to pull trains composed of 32 passenger cars.
Production
For a purpose of driving heavy train, by the early 1980s SKODA plant projected universal AC/DC 8-axle locomotive. (Refer to ChS8). They were designated for pulling trains along the hard-to-pass profiles. For the purpose of projecting new electric DC locomotive, ChS6 and ChS200 features were used as a basis; as compared with these two projects, Chs7 featured several modifications.
See also
![](../I/m/Commons-logo.svg.png) |
Wikimedia Commons has media related to ChS7. |
References
Rolling stock of Russia |
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Steam locomotives | |
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Diesel locomotives | Freight | |
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| Passenger | |
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| Shunting Industrial |
- Оэл
- ВМЭ1
- ЧМЭ2
- ЧМЭ3 (ChME3)
- ЧМЭ5
- ТЭМ1
- ТЭМ2
- ТЭМ3
- ТЭМ4
- ТЭМ5
- ТЭМ6
- ТЭМ7
- ТЭМ9
- ТЭМ12
- ТЭМ15
- ТЭМ18
- ТЭМ21
- ТЭМ31
- ТЭМ-ТМХ
- ТЭМ103
- МГ1
- МГ2
- АМГ5
- ТГМ1
- ТГМ21
- ТГМ23
- ТГМ2
- ТГэ
- ТГК
- ТГК2
- ТГМ3
- ТГМ4
- ТГМ5
- ТГМ6
- ТГМ7
- ТГМ9
- ТГМ10
- ТГМ11
- ТГМ12
- ТГМ14
- ТГМ40
- АА
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| Narrow gauge | |
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Electric locomotives | |
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Multiple units | Metro | |
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| Diesel | |
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| Electric | |
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| High speed | |
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