Kolektor Etra has opened a €14 million production hall at its Barajevo transformer plant in Serbia, expanding heavy manufacturing capacity as European power networks compete for equipment needed for grid reinforcement, renewable connections and growing electrical demand.
Kolektor Etra has added 3,100 sq m of production space at the site. The hall is equipped with two ovens for drying transformer windings and active parts and an industrial crane capable of handling loads of up to 70 tonnes.
The investment follows a €7.5 million high voltage laboratory opened at Barajevo in 2024, taking disclosed investment across the two projects to €21.5 million. The company is already planning further expansion, including additional coil winding capacity.
Power transformers are difficult products to scale quickly. They are large, technically specialised and frequently engineered around project specific electrical requirements rather than manufactured as completely standard units from stock.
Production requires electrical steel, conductors, insulation systems, tanks and other specialist materials before winding, core assembly, drying, final assembly and electrical testing can be completed. Heavy handling capacity is integral to the process because active parts and finished units rapidly exceed the lifting capability of ordinary factory equipment.
The two drying ovens added in Barajevo address another critical process. Moisture has to be tightly controlled inside transformer insulation because it can compromise dielectric performance and long term operating reliability once equipment is energised at high voltage.
The plant manufactures power transformers for customers in Serbia and across Western and Northern Europe. Export markets include the UK, Germany, Sweden, Denmark, Austria, the Netherlands, Norway and France, with Switzerland also being developed as a market.
That export profile places Barajevo directly inside the European grid investment cycle. Transmission and distribution operators are expanding networks to connect renewable generation, storage, industrial electrification, electric transport and large digital infrastructure loads while simultaneously replacing ageing assets.
Almost all of those programmes eventually encounter transformers, and production capacity has become one of the practical limits on project schedules. Large units can carry long lead times because manufacturers have finite winding, assembly, drying, testing and engineering capacity even when customers are ready to place orders.
Expanding factory space is therefore only part of the answer. Each process stage has to grow in balance. More assembly positions create little additional output if winding operations, drying ovens or test facilities remain constrained.
Kolektor Etra’s investment sequence reflects that requirement. Barajevo has already added high voltage test capability, is now increasing manufacturing and heavy handling capacity, and plans another facility focused on coil winding.
The Serbian Development Agency says the future winding investment could take annual output beyond 200 power transformers. Employment is also expected to increase as the plant expands.
Workforce availability may become as important as factory equipment. Transformer manufacture requires electrical design, winding, assembly, testing and quality expertise that cannot be created as quickly as floor space can be built.
Manufacturers across Europe are increasing capacity at the same time, intensifying competition for experienced engineers and technicians. New hires therefore have to be trained while existing factories continue supplying customer orders, which can make rapid production increases more difficult than headline investment values imply.
Testing is another constraint. High voltage equipment cannot leave a factory simply because mechanical assembly is complete. Electrical verification, insulation testing and customer acceptance processes all have to be carried out before shipment, making laboratory throughput part of total plant capacity.
The €7.5 million laboratory opened in 2024 consequently forms an important part of the current expansion rather than an unrelated earlier project. Manufacturing and testing have to increase together if additional transformers are to move through the plant without building another queue before delivery.
Lead times also depend on the supply of materials and components into the factory. Electrical steel and copper demand can be substantial, while transport becomes a specialist exercise once finished transformers reach the size and weight associated with transmission and major industrial applications.
Barajevo gives Kolektor Etra a manufacturing base positioned to serve European customers while further capacity is added over the remainder of the decade. The company’s next winding investment will determine how much of the new hall can be converted into higher finished output rather than merely creating additional floor space around the existing production bottlenecks.
The wider market provides ample reason to expand. Europe’s electricity system needs more transformers, but manufacturers still have to turn capital investment into qualified people, reliable processes and tested equipment before grid developers see shorter delivery schedules.
