Transformers

COPPERCORE distributes distribution and measuring transformers from leading European manufacturers, including Elprom Trafo. We supply transformers for utility substations, industrial power systems, and commercial facilities across Serbia.

Our transformer range covers oil-immersed distribution transformers from 25 kVA to 5 MVA and precision measuring transformers for billing and technical metering applications. Every transformer we supply meets current European efficiency standards and is backed by manufacturer documentation and support.

Whether you are specifying transformers for a new substation, replacing aging units in your distribution network, or equipping a manufacturing facility, we provide the technical range and product availability to meet your project requirements.

Distribution Transformers

Distribution transformers form the backbone of power delivery networks, stepping down medium-voltage supply to the 0.4 kV levels used by end consumers and industrial loads. We offer oil-immersed (ONAN cooling) transformers in standard power ratings from 25 kVA to 5 MVA, with primary voltages up to 52 kV.

These transformers serve a wide range of applications -- from utility substation installations and industrial plant power feeds to commercial building supply and renewable energy grid connections. The oil-immersed design provides excellent thermal performance and long operational life, making it the standard choice for outdoor installations.

When selecting a distribution transformer, key considerations include the required power rating for your load profile, primary and secondary voltage levels, loss class requirements under EU 2019/1783, and physical dimensions for your installation space. We can advise on the right configuration for your specific project.

Measuring Transformers

Measuring transformers provide the accurate voltage and current signals that metering and protection systems depend on. We supply both voltage transformers (VTs) and current transformers (CTs) in accuracy classes from 0.2 to 1, suitable for revenue metering, technical measurement, and protection relay inputs.

In utility networks, measuring transformers are critical for accurate billing -- even small measurement errors at the 0.2 accuracy class level can represent significant financial impact over time. For industrial facilities, they provide the measurement data needed for power quality monitoring, load management, and protection coordination.

Available in both cast resin and oil-insulated designs with rated voltages up to 35 kV and current ranges from 5 to 2000 A, our measuring transformer range covers the requirements of most substation and industrial metering installations in Serbia.

Need help choosing the right transformer?