The company POLL, s.r.o. has been operating since 1996. The main activity is the development and manufacturing of electronic systems for applications in power electronics and other fields of electrical engineering. The company supplies controllers for power converters for traction drives, including application-specific software.
The aim of the project is to enable the operation of the locomotives of the 263 series (the original type of 70E1) produced by Zeleznicna spolocnost Slovensko, a. s. (ZSSK) from the control car of the 951 series of the newly supplied returnable multiple units produced by Skoda Vagonka in Ostrava. The main part of the change is the replacement of the original control system of the locomotive to a control system using components tested on the electrical units of the 671 series by ZSSK.
The aim of the project is to replace the aging parts of the electrical equipment of the suburban pantograph units of the 560 series. The parts that remained there are the original main transformer, traction motors and pneumatic switches changing direction and the modes of drive and brake. The following parts were completely replaced: traction inverters, regulators of traction drives, and inverters of the auxiliary drives.