| ChS8[1] | |
| Powertype: | Electric |
| Builder: | Škoda Works |
| Builddate: | 1983–89 |
| Totalproduction: | 82 |
| Gauge: | |
| Length: | 33740mm |
| Width: | 3000mm |
| Electricsystem: | Catenary |
| Collectionmethod: | Pantograph |
| Maxspeed: | 180km/h |
| Poweroutput: | 7,200 kW |
| Trainheating: | 1,500 kW |
| Operator: | РЖД (RZhD), УЗ (UZ) |
| Locale: |  Russia Soviet Union  Ukraine |
The ChS8 (Russian: ЧС8) is an electric mainline AC passenger locomotive used in Russia and Ukraine.
The 8 axle locomotive was developed for pulling long passenger trains (28–32 carriages) at speeds around 100 km/h or faster. In 1983 the first two experimental locomotives were constructed anddelivered to Kyiv for tests and adjustment. In 1987 30 locomotives were built as a mass model. In 1989 last 50 locomotives were built.
As the most powerful AC passenger locomotive in USSR designed for long trains, ChS8 experienced a low demand when after the disintegration of the USSR passenger turnover in both Russia and Ukraine fell significantly. After 2010 Russian railways turned to more energy-effective EP10 and EP20 as powerful locomotives for fast or long passenger trains.