Used transformers can be sourced from surplus dealers, utility decommissioning auctions, industrial liquidation, refurbishers, and certified recyclers who provide test reports and oil analysis.

No-load core losses, load (copper) losses, stray and eddy losses, dielectric losses, and cooling/auxiliary losses.

It involves condition monitoring, electrical testing, mechanical inspections, insulation assessments, and corrective actions such as oil processing, gasket replacement, and OLTC contact refurbishment.

Industries such as high power rectifier systems for electrolysis, arc furnaces, HVDC converter stations, semiconductor fabrication plants, large UPS systems, and test laboratories frequently need custom power transformers. They may require particular leakage reactance, multiple secondaries, complex cooling arrangements or integrated monitoring. Environmental conditions such as offshore, desert or arctic locations also drive custom mechanical and insulation designs. In these sectors transformer performance and reliability are tightly linked to process continuity and product quality.

In Saudi Arabia, power transformer companies serve national grid operators, oil and gas fields, petrochemical complexes, desalination plants, heavy industry, and rapidly expanding urban developments. They supply GSUs, grid autotransformers, and distribution transformers for HV substations, refineries, industrial cities, and renewable projects. Robust designs for high ambient temperatures, desert conditions, and high short-circuit duties are key requirements in these applications.

Yes, low-frequency drying is especially suitable for large power transformers with a high mass of cellulose insulation, and in fact this is one of the cases where LFD shows its main advantage. Because the windings are heated internally by low-frequency current, the heat is generated directly inside the thick paper layers, where moisture diffusion is slow in conventional ovens. This gives much more uniform and effective drying than external heating. The limitation is time and power availability: for very large units the process can take many days and requires careful temperature control, but technically it is one of the most efficient methods for deep drying of massive insulation systems.

Factors include conductor size, insulation system, turns count, layer geometry, cooling ducts, mechanical bracing, parasitic inductance/capacitance, and short-circuit withstand. Designers optimize electrical performance, thermal paths, and mechanical strength.

In TOR-5, hydrogen detection is typically based on an electrochemical sensor rather than optical or chromatographic methods. This type of sensor is well suited for continuous online operation because it is compact, relatively stable, and sensitive in the low ppm range that is critical for early fault detection. It does not provide full gas composition, but it reliably tracks hydrogen trends over time, which is often the earliest indicator of partial discharges or thermal degradation inside the transformer.

Cooper branded transformers from Eaton are widely used by electric utilities for distribution networks, pad mounted installations and underground systems. Municipalities, rural cooperatives, commercial campuses and industrial facilities also rely on these units. They are common in North American style overhead and underground distribution systems that require robust, standardized equipment. Many renewable projects and private distribution networks use Cooper equipment for reliable medium voltage power distribution to diverse end users.

The TOR-3 is a laboratory breakdown-voltage tester for insulating oils up to 60 kV, compliant with IEC 60156. GlobeCore can provide pricing, datasheet, and contact information for the official representative in Croatia.