ER1 electric trainset
Encyclopedia
ER1 electric trainset was manufactured by Rīgas Vagonbūves Rūpnīca
Rigas Vagonbuves Rupnica
Originally named Phoenix, Rīgas Vagonbūves Rūpnīca was founded in 1895 by the businessman Oscar Freywirth and is one of the largest machine-building plants in Latvia. RVR is based in Riga and was for many years the largest producer of electric and diesel trains and also tramcars in the former...

 from 1957 till 1962 for suburban commute usage within Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

on lines electrified on 3000 V, DC.
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