 They consist of bicollector voltage divider (dynamotor) for EK-7A motor compressors which need 1500 V, and current generator for control circuits, lighting, etc.In case of 3000 volts, the divider has a normal power of (5.3 A, 1000 rpm,) the generator has a power , 50 V, 200 A.

EK-7A motor compressors are installed in cab and trailer cars.The feature air providing speed.