Presentation

 

The Dry-Type Transformers, with epoxy-encapsulated coils under vacuum, from DRY UTILITIES series, manufactured in up to 1000kVA rated power, in the voltage classes up to 36.2kV, specially developed to meet the eletrical utility companies specifications are the Energy Efficiency Transformers. The DRY UTILITIES have low losses and when they are submitted to life-cycle cost analysis, the total purchase cost is substantially reduced, because the electric power consumption becomes much lower, in comparison with a conventional Transformer. They are recommended for application in industrial eletrical substations, business centers, data centers and hospitals where there is a search for energy consumption reduction and in places requiring convenience, safety, performance and reliability in critical loads. Manufactured with advanced technology, meeting requirements from standards ABNT, NBR and IEC EN, produced in modern equipment, employing materials and certified productive processes, guaranteed by the standards ISO 9001:2008. The application of the Dry Type Transformers from the DRY UTILITIES series, as well as reducing the eletrical power consumption, due to the low losses, also result in higher safety and saving, enabling the use next to the loads center, reducing expenditures with low voltage facilities and improving its performance. They also eliminate expenditures with other items, such as explosion-proof environment, fire doors, and drains to collect the insulating liquid and protective barriers.

 

Construction

 

The magnetic core manufactured in special high permeability, grain-oriented silicon steel sheets, step-laped cutting type, ensuring low no-load losses and reduced noise level. The HV and LV coils are manufactured with high-purity aluminum conductors in continuous winding, reducing mechanical stress efforts, while the LV coils are impregnated and the HV coils are encapsulated in epoxy resin under high vacuum, then annulling the presence of micro bubbles, mitigating the index of partial discharges. All Transformers are tested in accordance to the standards ABNT NBR 10295 / 5356-1/5 and dispatched with the respective test reports.