PKP class SU46


SU46 is the name for a diesel universal purpose locomotive working for Polish PKP. Cegielski has produced 52 machines in years 1974-1977 and 2 modified in 1985.

History

The 302D and 303D type locomotives are heavily improved version of 301Db type diesel locomotive. Both of them has similar shape, but SP47 is a bit longer because of its 2116SSF diesel engine. SU46 uses similar diesel engine as SP/SU45, but traction motors are totally different. Construction of SU46 was stopped in 1977, most likely due to communist government decisions. In 1985 additional two units of this class were built. They are slightly modified version of previous locomotives.

Operation

Order of this locomotive was connected with increasing in 1970s demand on freight and passenger services on non-electrified railway lines. SU46 has a very universal characteristic - it was possible to use them in passenger service and freight.
Today they are used in service on west Polish border and in Warmia and Masuria.
Previous they were used also in passenger service on Hel Peninsula.