neroden wrote:trainviews wrote: Russia I don't know that well and economically it is not really comparable,
For reference, Russia runs long, heavy freight trains (second only to the US), and Russia has electrified pretty much everything, including the Trans-Siberian Railroad.
At current oil prices (as opposed to 1950s oil prices) it's always cheaper to run electric trains than diesels on busy lines (one-a-day branch lines are another matter), even accounting for the costs of maintaining the wiring. Unfortunately that doesn't account for the capital cost of electrifying lines in the first place. Those capital costs are the main deterrent to electrification for freight purposes. There is an oil price such that it becomes obviously worth it, but it's rather high; if oil prices hit the 2008 peak price permanently, I think that's large enough.
Not True Russia's rail system is only half Electrified and Diesel Locomotives out number Electric units by far across the system along with a few thousand Steam Locomotives scattered about the former USSR in there reserve fleet in Russia, Ukraine, and Belarus. Many of these Steam Locomotives are intended to be use for State wide emergency's such as War, or weather related issues that might other wise take out Electric Power, pipe lines, refinery's, or tank farms. My sources for this info come from a few friends of mine who are retired Ukrainian Military adviser's and the wife's Grandfather who is retired from the (NKVD/KGB Military Railway officer)
I my self live in Ukraine on and off 3 months out of the year and the only trains that are under Electric wires are passenger trains. Diesels handle the rest. Freight trains across Eastern Europe are long yes but compared to Western Europe the Former Soviet bloc country's still have not caught up with upgrading cars from composite side boxcar's to all steel cars. Just about 65% of the Eastern Bloc country's still use composite side boxcar's and Gondolas system wide I see them all the time in Ukraine, Belarus, and in Russia cars range from 40 to 65ft some with 4 axles (2 trucks per car) some with 6 axles (2 trucks per car) Steel cars are mostly privately owned and in better shape compared to the Wood cars. With all being said the construction material's used in the cars construction make up a big difference in the tonnage that can be hauled.
Russia and former USSR
Soviet electric locomotive VL60pk (ВЛ60пк), c. 1960 Russia and other countries of the former USSR have a mix of 3,300 V DC and 25 kV AC electric railroads due to historical reasons.
The special "junction stations" (around 15 over the whole former USSR - Vladimir, Mariinsk near Krasnoyarsk etc.) were equipped with contact wiring switchable from DC to AC. Locomotive replacement is essential at these stations and is performed together with the contact wiring switching.
Most Soviet, Czech (USSR ordered the passenger electric locomotives to Czech Skoda factory), Russian and Ukrainian locomotives can only operate as DC or as AC. For instance, VL80 is an AC machine, with VL10 being something like a DC version of VL80. There were some half-experimental small-series like VL82, which could switch from AC to DC and were used in small amounts around the city of Kharkov in Ukraine. Also, the latest Russian passenger locomotive EP10 (experimental only?) is dual-system.
Historically, first the 3,300 V DC wiring was used due to vehicle simplicity. The first experimental track was in Georgian mountains, then the suburban zones of the largest cities were electrified for motor-car locomotive-less trains to be used - very advantageous due to much better dynamic of such a train compared to the steam one, which is important for the suburban service with frequent stops. Then the large mountain line between Ufa and Chelyabinsk was electrified.
For some time, electric railways were only considered to be suitable for suburban or mountain lines. In around 1950, a decision was made (according to the legend - by Joseph Stalin) to electrify the highly-loaded plain prairie line of Omsk-Novosibirsk. After this, electrifying the major railroads with 3,000 V DC became a mainstream.
25 kV AC contact wiring started in the USSR in around 1960, when the industry managed to build the rectifier-based AC-wire DC-motor locomotive (all Soviet and Czech AC locomotives were such; only the post-Soviet ones switched to electronically controlled induction motors). The first major line with AC power was Mariinsk-Krasnoyarsk-Tayshet-Zima; the lines in European Russia like Moscow-Rostov-on-Don followed.
In 1990s, some DC lines were rebuilt as AC ones to allow the usage of the huge 10 MWt AC locomotive of VL85. The line around Irkutsk is one of them. The DC locomotives freed by this rebuild were transferred to St. Petersburg region.
The Trans-Siberian Railway has been partly electrified since 1929 and entirely electric hauled since 2002. The system is 25 kV AC 50 Hz after the junction station of Mariinsk near Krasnoyarsk, 3,000 V DC before it and train weights are up to 6,000 tonnes.
SA3 couplerMain article: SA3 coupler
The simplified scheme of the SA-3 automatic couplers.
An animation of the SA-3 couplerThe Russian SA3 coupler works according to the same principles as the AAR coupler but is incompatible, it was introduced during the rebuilding of the railway network in Soviet Union after the Second World War and have since been used on the whole broad gauge network, including Finland and Mongolia. It is also used on the standard gauge networks of Iraq and on Malmbanan in Sweden for ore trains.
Russian trains are rarely longer than about 750 m (2,460 ft) and rarely exceed a maximum tonnage of about 6,000 t (13,000,000 lb), so it is not clear what potential load these couplings are capable of. The trains on Malmbanan are about 8,000 t (18,000,000 lb).
The force to break the SA-3 coupler is about 300 tonnes-force (2.9 MN; 660,000 lbf).
The maximum allowed tractive effort to the SA-3 is limited to 135 tonnes-force (1.32 MN; 298,000 lbf) by Russian white papers.
The proposed European automatic coupler is compatible with the Russian coupler but with automatic air, control and power connections. Implementation is permanently delayed except for a few users. The SA3 resembles a left-handed fist.