OTN - OTR - OTF
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ENERGY GENERATION/DISTRIBUTION AND INDUSTRIAL TRANSFORMERS

IQTrafotec Technology SEA has been designing and manufacturing liquid immersed, cast resin and air insulated transformers, positioning itself among the industry leaders since 1959 IQTRAFOTEC® Innovative construction solutions, modern and technologically advanced processes, detailed checks throughout the entire design and construction chain asssure the total quality of the product. SEA has established procedures to assure the TOTAL QUALITY of its products availing itself on its own know-how and adapting it to innovative manufacturing processes and strict control procedures. This type of...

Energy generation/distribution and industrial transformers SEA provides the right transformer for each specific need, ensuring reliability and high level performance OTN TRANSFORMERS PERFECT FOR THE ENERGY INTEGRATION IN THE NETWORK Among the phases preceding the process that leads to the use of energy by the final consumer, there are production, transmission, distribution or conversion. Usually the energy in the power generation stations - both conventional and hydroelectric, wind, solar, etc. - is produced at MV level; in order to be transferred and distributed to end-users, voltage must...

From concept to realization Years of experience developed into strict calculation procedures, modern design and verification programs are the basis of the technology that allows the engineers of SEA to face successfully any technological development and the most complicated design solutions requested by our customers. SEA avails itself of technologies, machinery and equipment for realizing all possible technical and construction solutions involving the transformers of the OTN, OTR and OTF series. This versatility allows optimizing the thermal sizing, insulation and resistance to overloads...

A specific shape for each need The type and the shape of the conductor, as well as the type of winding, depend strictly on the currents and voltages involved. The form used for the windings of power transformers is mainly rectangular (strand), unlike those for distribution where circular wires are used; the main reason for this lies in the fact that the rectangular shape makes it possible to use the space available more effectively. It should be noted that the increase of the conductor area implies an increase in the losses due to eddy currents. To overcome this problem usually several...

THE ASSEMBLiNG OF THE ACTiVE PART The whole is coming into groove The insulating materials are subject to significant dimensional variations due to tolerances and the amount of humidity present in their fibers. A long experience and great care in the assembly of the active part are the secrets to guarantee our product reliability and robustness against the inevitable dielectric and electrodynamic stresses to which it will be subject during its life. The windings carefully pressed and dried in autoclave are keyed on the respective columns of the core; then, the yoke is assembled, the cover...

BOX-TERMINALS One customization for each installation requirement The INDOOR and OUTDOOR maximum installation flexibility - from the offshore, up to the lowest temperatures or desert environments - is available with a full range of solutions for protecting the terminals from oil-oil to oil-SF6 till the segregated phases. The protection degrees can be studied with customized solutions to meet any need that may arise. testing room Quality beyond the test SEA has 3 modern testing rooms as well as of special equipment for performing routine, type and special tests according to the regulations...

Solutions studied to cover all the production requirements in terms of both constructionlivello Soluzioni studiate per coprire tutte le esigenze produttive sia a and installation, bearing in mind that the objective of the transformer manufacturers and a precise di realizzazione che di installazione ricordando che, l’obiettivo dei need of end users is to anticipate any trasformatori ed una precisaconsequences in case of costruttori di faults and limit the possible esigenza degli utilizzatori failure of the transformer itself: prevedere le eventuali anomalie e limitare le possibili finali, è...

Standard Air breather Air dryers are used in liquid immersed transformers and they have the function of absorbing humidity air that is necessarily sucked by the conservator during the thermal contraction of the liquid itself easing its dielectric capacitance. There is a wide range of models in relation to the amount of liquid present in the transformer. For assuring its proper operation, it must be inspected periodically as the salts contained within the same pass from the humidity-free condition (orange) to a saturated stated (green), according to the environmental stress. Self dehidrating...

Pressure relief device A sudden and violent internal short circuit in the transformers in insulating liquid produces a large volume of gas which, if not promptly evacuated, may result in the explosion of the transformer itself. There is the possibility of using a simple pressure relief device or a relief device equipped with protection and tripping signal when the pressure is affected by these instantaneous and uncontrolled increases with consequent hazards for both safety and the environment. They can be equipped with a simple protection or with a conveyor in case one wishes to collect and...

The transport and the site assembling SEA can deliver the transformer everywhere in the world Thanks to the experience gained over many years and to its qualified personnel SEA performs the shipping and reassembling on site, agreeing from time to time with the customer on the most appropriate approach. For shipments carried out to particularly critical sites or if requested by the customer SEA can equip the transformers with a sophisticated “impact recorder” that allows to keep the quality of the transport monitored. SEA is able to meet your needs with a modular and flexible intervention...