Tunnel in the Middle East

During the 2012. for a project Tunnel in the Middle East we produced 152 fields of electrical cabinets width 800 to 1600 mm and depth 600mm. It is the participation in the construction of two tunnel tubes of up to 24 meters and which together have a length of about 10 kilometers, which is necessary to ventilate through the lateral and vertical ventilation, using 89 jet fans with 37kW of power at 400V and 8 axial fan with 450kW of power at 690V.

Cabinets are equipped with ATV61 frequency inverters (315kg) for axial fans and ATS48 devices for soft start of jet fans.


The cabinets of axial fans are built Materpact breakers 1600A equipped with control units which provide the ultimate protection of equipment against overload, short circuit and earth faults, and insight into energy consumption.

For the protection of jet fans we used Compact breakers equipped with protective units to protect equipment against overload and short circuit to which are added vigi moduls which protects against earth faults.

Our workshop has done all the necessary installation of bus distribution, wiring, labeling cables. Accordingly, we have made as built documentation.

During this activity we managed to organize visits to our workshop by students from Technical polytechnic in Zagreb, as well as other interested investors.

After mounting, wiring, parameter setting of frequency controllers and soft start devices, testing and attesting, which ran within a given period of 3 months, each field is properly packed and loaded on 5 trucks that were dispatched to the Middle East.

For the successful execution of this job, we have engaged all employees, especially about twenty of our valuable and professional electrical workers.

After a successful delivery, our engineers have performed setting up cabinets at the site, their interconnections, connection on the power and communication cables, and commissioning. Environmental conditions inside the tunnel of this size are not ideal, but the works were successfully carried out!


Return to references