ChS8

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{{Use dmy dates|date=February 2022}}

{{Infobox locomotive

| name = ChS8[http://scado.narod.ru/th/th_e_chs8.htm Technical details on scado.narod.ru]

| powertype = Electric

| image = Locomotive ChS8-075 2011 G1.jpg

| caption = Electric locomotive ChS8-075

| builder = Škoda Works

| builddate = 1983–89

| totalproduction = 82

| gauge = {{track gauge|1524mm|lk=on}}
{{track gauge|1520mm|allk=on}}

| length = {{convert|33740|mm|ftin|abbr=on}}

| width = {{convert|3000|mm|ftin|abbr=on}}

| electricsystem = {{25 kV 50 Hz}} Catenary

| collectionmethod = Pantograph

| maxspeed = {{convert|180|km/h|abbr=on}}

| poweroutput = 7,200 kW

| trainheating = 1,500 kW

| operator = РЖД (RZhD), УЗ (UZ)

| locale = {{flagicon|RUS}} Russia
{{flagicon|SUN}} Soviet Union
{{flagicon|UKR}} Ukraine

}}

The ChS8 ({{langx|ru|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 and

delivered 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.