Within the moder­ni­sa­tion, only the frame, bogies with trac­tion motors and fuel tanks have been left from the old loco, all of which undergo a com­plete over­haul. Based on the new design docu­men­ta­tion, the vehicle body shape has been com­ple­tely chan­ged. In moder­ni­sed locos, a new power-generating unit has been used. The pre­vio­usly used a8C22 motor has been repla­ced with American-made C27, a 12-cylinder, high-pressure die­sel engine manu­fac­tu­red by CATERPILLAR of 708 kW (962KM) power con­nec­ted by fle­xi­ble coupling with a syn­chro­nous gene­ra­tor set (main and auxi­liary gene­ra­tor). Micro­pro­ces­sor con­trol­ler and loco dia­gno­stic sys­tems have been instal­led. The power-generating unit has been fit­ted with a modern radia­tor and turbo-charge air cooler and a brand new intake and exhaust sys­tem. These solu­tions have signi­fi­can­tly redu­ced fuel and oil con­sump­tion and impro­ved the loco’s reliability.

Locos are fit­ted with a modern bra­king sys­tem using an inte­gra­ted pneu­ma­tic board, screw com­pres­sor and spring-actuated par­king brake. Auxi­liary dri­ves (trac­tion motor fan drive and com­pres­sor drive) are pro­vi­ded by asyn­chro­nous motors powe­red by the auxi­lia­try gene­ra­tor  via inverters.

The trac­tion engi­nes are powe­red  by a trac­tion gene­ra­tor via a set of diode rectifiers.

A brand new driver’s cab has been desi­gned with two ergo­no­mic con­trol panels for the dri­ver, ame­ni­ties, pano­ra­mic wind­screen (thanks to lowe­ring the machine room ceiling), air-conditioning and effi­cient heating as well as com­for­ta­ble, adju­sta­ble seats on tracks fixed to side walls, which makes it possi­ble to hide them com­ple­tely under the con­trol panel. The cab is set on the loco frame with metal-rubber absor­bers which muf­fle vibrations.

The loco’s modern body shape meets the con­tem­po­rary requ­ire­ments in design, ergo­no­mics and safety and the pano­ra­mic win­dows instal­led in the driver’s cab have signi­fi­can­tly impro­ved track visi­bi­lity. Locos are adju­sted to be ope­ra­ted by one per­son and they may be equ­ip­ped with the radio con­trol system.

Modern con­trol and power supply:

  • Micro­pro­ces­sor loco controller;
  • On-board dia­gno­stics on the operator’s panel;
  • Syn­chro­nous gene­ra­tors desi­gned for con­ti­nu­ous ope­ra­tion (S1– in accor­dance with the IEC 349 standard);
  • Loco’s elec­tric trans­mis­sion: alter­na­ting cur­rent – direct current;
  • Inver­ter for dri­ving auxiliaries;
  • Asyn­chro­nous motors to power auxiliaries;
  • LSa 430 trac­tion motors powe­red by the main syn­chro­nous gene­ra­tor thro­ugh a diode rectifier;
  • IGBT-based trac­tion rectifiers;
  • Microprocessor-controlled bra­kes.

Impro­ving driver’s work ergonomics:

  • Two con­trol panels, one for either dri­ving direction;
  • On-board dia­gno­stics on the driver’s panel;
  • Elec­tro­nic spe­edo­me­ter with event recorder;
  • Impro­ved visi­bi­lity thanks to lowe­ring the machine room ceiling;
  • Eli­mi­na­ting driver’s cab vibra­tions with the use of metal-rubber absorbers;
  • Incre­ased cab’s servi­ce­able area;
  • Air-conditioning and heated windscreens;
  • Cab access from loco­mo­tive platforms;
  • Ame­ni­ties inc­lu­ding a loc­ker, fridge, cooker and washbasin.

Eco-friendly tech­no­lo­gies

Appli­ca­tion of modern solu­tions has led to reduc­tion in fuel and oil con­sump­tion, thus limi­ting the exhaust-gas emis­sions to the environment.