Dukovany NPP and Temelín NPP – Maintenance of the Logical Unit “ELECTRICAL"

I&C Energo a.s. is the long-term supplier of maintenance services for the logical unit “ELECTRICAL”, which represents the equipment of power plant on-site consumption (working, reserve and emergency power supply), including power output. It contains voltage levels VHV (400 and 110kV), HV (24 and 6kV) and LV. The equipment consists of transformers, encapsulated conductors, generator switches, cabling, 6kV and 0.4kV electrical switchboards, electrical protection and automatic circuits, AKU batteries, inverters and rectifiers, measuring and monitoring systems and, last but not least, rotating machines.

The content of maintenance includes not only the implementation of maintenance, tests and repairs by qualified workers, but also the preparation of work, including definition of work procedures, obtaining the necessary permits and procurement of spare parts.

The important areas are the activities of electrical specialists (for example, on electrical protection of switchboards and power output, automatic voltage regulation systems, excitation systems of TG/turbine generator and DGS/diesel generator), which are essential from the perspective of reliable and safe operation of all technological equipment. Therefore, on-the-job training, instruction, development of knowledge, skills and improvements in the qualifications of employees are also part of ensuring high quality of maintenance.