In Velika Ciglena near Bjelovar, the first geothermal power plant in Croatia, 'Velika 1', is being completed. HELB contracted a segment of electrical works involving the supply of equipment/materials and electrical assembly works as well as providing services of construction site manager for electromechanical works. It's HELB's biggest single contract so far, and the total project investment is over 35 million euros.

The technical complexity of the project required the forming of a multidisciplinary team, from the project leader, designers who further developed project documentation, a team that made LV cabinets in the HELB production facility to the head of the electromechanical works at the construction site. The scope of HELB's electromechanical works includes the fabrication of MV 35 kV and 11 kV grids, the installation of MV circuit blocks with block transformer, the manufacture and installation of LV cabinets, the installation of other MV and LV equipment delivered by generator supplier as well as other equipment related to the technological process. Before commissioning, required tests and protection settings are performed by experienced HELB engineers.

With the gross power of 16.5 MW 'Velika 1' will be the largest geothermal power plant with binary (ORC) technology in continental Europe. By delivering a net of 10 MW in the distribution network, it will meet the average electricity demand for 2,300 households. It should be emphasized that geothermal power plants are the basic electricity producers, ie using the energy of the Earth's interior, they deliver the energy permanently and reliably.

The investor of this project is Turkish MB Holding, while Croatian Đuro Đaković was selected for the main contractor.