|  | Class | NVR Number | Axle Formula | Number | Year in Service | Power [kW] | Tractive Effort [kN] | Max.Speed [km/h] | Traction Type | Voltage | 1st class | 2nd class | 
    
      |  | ER1 | 
 | EMU-4 | 6 | 1958 | 1600 | 
 | 130 | E | 3000V= | 0 | 
 | 
    
      | ER, old EMUs, basic USSR type, nrs. 2301-2312
(sets 2300+3300+3300+2300) | 
    
      |  | ER2 | 
 | EMU-4 | 4 | 1974 | 1600 | 
 | 130 | E | 3000V= | 0 | 292 
 | 
    
      | ER, most numerous USSR EMUs, nrs. 2101-2108
(sets
2100+3100+3100+2100) | 
    
      |  | ER2S | 
 | EMU-4 | 3 | 1976 | 1880 | 
 | 130 | E | 3000V= | 0 | 292 
 | 
    
      | ER, trainsets rebuilt from retired class ER12
(EMU-3), nrs. 2201-2206 (sets 2200+3200+3200+2200) | 
    
      |  | ER2T | 
 | EMU-4 | 2 | 1987 | 4700 | 
 | 130 | E | 3000V= | 0 | 292 
 | 
    
      | ER, reconstructed from ER2S/ER12, slightly
different
motors and brakes, nrs. 2111-2112/2207-2208 | 
    
      |  | ER2M | 
 | EMU-4 | 1 | 1982 | 2400 | 
 | 130 | E | 3000V= | 0 | 
 | 
    
      | ER, trainset with driving motorcars rebuilt from
class ER12, nrs. 2401/2402 | 
    
      |  | ET2R | 
 | EMU-3 | 1 | 1979 | 2400 | 
 | 130 | E | 3000V= | 0 | 
 | 
    
      | ER, similar to class ER2, with
regenerative-rheostatic brake (nrs. 2501/2502) | 
    
      |  | MEV-1 | 
 | EMU-1 | 1 | 1974 | 800 | 
 | 130 | E | 3000V= | 0 | 0 | 
    
      | Electric motor car rebuilt from class ER2, used
for shunting (withdrawn 2014) 
 |