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SM30 is a Polish series ofdiesel shunting locomotives used byPKP and industry, built byFablok,Chrzanów (factory designationLs300E). They were also used for a local traffic.[1]
SM30 locomotive is the first Polish diesel locomotive equipped withelectrical transmission. A design was worked out by the Central Rolling Stock Industry Construction Bureau in Poznań. Theprototype was constructed inFablok,Chrzanów in 1957. 909 items were built in 1957-1970, 302 of them found place inPKP, the rest worked in the industry (with designations Ls300 or SM30).[1] The locomotive was also known under its project designation 1D or early PKP designation Lwe55 (until 1960).[1]
In the 1970s, 109 items of SM30 locomotive were modified forheating passenger wagons with 500V electric heaters, and as a result their class designation was changed toSP30 (able to pull passenger trains).[1] Those machines remained in regular service until the late 1980s. In 2000 all of them were again, after dismounting heating systems, returned to SM30 series.[2]
SM30 is aBo′Bo′ locomotive, what means it runs on twobogies, each equipped with twoaxles. The general construction of this engine is relatively simple. Being the pioneer machine in the Polishrailway industry, it incorporated many solutions from other branches of industry, i.e. the first engine to be mounted, Wola V-300, was taken fromtank construction, mainDC currentgenerator was in fact stationery generator andtraction motors were taken fromtrams. As the first Polish locomotive withdiesel-electric transmission it proved the high efficiency of that solution and was quite successful.[1]
Thelocomotive frame is constructed ofsteel rolledformers. Ball stub-axles are mounted to strend girders, that makewelded box construction. A power unit, composed of adiesel engine and maingenerator, is mounted on parallel girders. The engine is connected to main generator with an elasticclutch. Fourtraction motors (two on each bogie) are mounted with a tram system. Traction motors can be powered inseries connection,parallel connection and parallel connection with field reduction of 40 to 60%.
Traction motors are series devices with 60 kW (80 hp) hour power. Maingenerator (PABOM-186a type) is aDC machine with 600V and 367A. Its power rating whilst working with 1500rpm. is 220 kW (300 hp). During engine starting the main generator serves aselectric starter, powered from thebattery. For the purposes of lighting the locomotive and charging batteries an additional generator (Pw-114a type) is used.
SM30 locomotives had two types of diesel engine mounted. Wola V-300 and 2DVSa-350 (from 1962) 12-cylinder engines had powers, respectively: 300 and 350 hp (220 and 260 kW).[1] Neutral gear rotation is 600 rpm. and rated rev is 1500 rpm.[3]
