As part of a project to modernise 12 overhead cranes, we carried out an extensive reconstruction of equipment originally manufactured in the late 1980s that no longer met current requirements for reliability, safety and operator comfort. The aim of the project was to extend the life of the cranes, increase their operational efficiency and, above all, to adapt them to current technical standards.

The modernisation included the delivery of twelve new crane cats of a modern concept, equipped with new travel and travel drives controlled by frequency converters, integrated electromagnetic brakes and electronic overload limiters. Each carriage has been individually designed for installation on existing bridges and rails, with the sheave and cableway designs modified to maintain full compatibility with the existing system.

The delivery also included a complete replacement of the bridge running gear groups, including new drive and driven wheels, bearings and compact gear motors. The drives are now controlled continuously by frequency converters, ensuring smooth starting, precise positioning and less wear on mechanical parts.

The electrical part of the project included the installation of new switchboards with Siemens S7-1200 PLCs, frequency converters, LED lighting under the crane, power chains to replace the outdated trolley cables, and safety systems - anti-collision protection, weighing equipment, projection of warning pictograms on the floor under the crane and signalling beacons. Each crane was equipped with a new radio remote control with the option of switching to an overhead controller.

The project included dismantling and assembly works, geodetic measurements and alignment of the travelling tracks, and above all a complete set of legislatively prescribed tests - from initial revisions and functional tests to EMC tests and TIČR's expert assessment.