PKP 3,000 V DC overhead Class EU07 2,680 hp Bo-Bo No.EP07-2003 in Polregio livery at Leszno, 20 November 2017. In the late 1950's the PKP wanted an advanced electric locomotive and bought 20 EU06 mixed traffic locomotives built by English Electric's Vulcan Foundry in 1962-65 which were a DC export version of the AC British Railways Class 83. PKP then procured Polish built versions of the EU06 - 488 EU07's built by Pafawag and Cegielski in 1963-1994 and 200 5,400 hp duplex ET21 heavy freight and coal Bo-Bo+Bo-Bo units (two EU07's joined together) built by Cegielski in 1977-83. In 1995-2003 ZNTK modified 97 EU07 locos to express passenger EP07 locos. The 15 EP08 locos built by Pafawag in 1972-76 were newbuild express passenger versions of EU07's. The final development of the type is the 3,916 hp EP09 Class, 47 being built by Pafawag in 1986-97. The class, with a revised body, was intended to be a completely new state-of-the-art design but a shortage of funds led to the adoption of many features from the EP07/08's. However, the mixture of new and old technology was not a happy one and many subsequent modifications had to be made.
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