Beginning in 1962 the Railroad Machinery Plants of Riga
started to release ER2 electric trainsets instead of ER1s. ER2 cars have footboards for low platforms, and aprons for high platforms, installed in the train yards. The presence of footboards caused body to be redesigned. The same time if compared with ER1 cars, front parts, edge walls, car end frames, and door places. The car improvement project was carried out by constructors from the Railroad Machinery Plants of Riga
In ER2 electric trainsets (their numbering starts with 300) DK-604B dynamotors, BVP-105A-1 fast switches are installed. These switches have diafragmatic lead. 40KN400 alkaline batteries are used instead of acid batteries.
ER2 motor car weighs 54.6 tons, Cab car - 40.9 tons, trailer car - 38.3 tons. The ER2 motor car weight is slightly higher than the ER1, because the plant used aluminum doors and wiring channels in order to reduce cars' weight.
It is necessary to point out the following from the most significant construction improvements.
In electric trainsets released in 1965 N. E. Galakhov's amortizers are changed by cylindrical springs. The same time hydraulic amortizers are installed between trolley frame edges, and upper beam above the amortizer. The static deformation of amortizing system is increased from 95 mm up to 120 mm. The body weight is transmitted to improved trolleys through edge sliders, while ______ serves only for... Read More