Windings. All cables, rods or conductors used for windings shall be of high quality and pure electrolytic copper. Conductor insulation will be made of high thermal stability paper resistant to aging, a varnish bath can be applied to improve mechanical resistance. The fully assembled winding and core assembly shall be vacuum dried to ensure moisture extraction and then impregnated and immersed in dielectric oil. h3. Tank The tank will be built with high-strength structural steel plates, reinforced with steel profiles. All openings that are necessary in the walls of the tank and in the cover, will be provided with flanges welded to the tank, prepared for the use elastic gaskets that do not deteriorate under the effect of the hot oil. Oil-resistant synthetic rubber gaskets will not be accepted. The tank shall be provided with two grounding plugs with their respective connectors located at the opposite ends of the bottom of the tank. It will also be provided with valves and accessories (the list is not limited). h4. Bushing insulators and terminal boxes Bushing insulators will be of the capacitor type. The porcelain used in the bushings must be homogeneous, free of cavities, protrusions, peels or cracks and must be impermeable to moisture. All parts of the bushings exposed to atmospheric action must be made of non-hygroscopic material. h5. Insulating oil The reactor will be supplied with its full insulation oil supply plus a reserve of at least 5% of the net volume. These supplies will be shipped separately in airtight steel containers. The reactor will be shipped without oil, instead it will be filled with nitrogen gas for transportation. The dielectric oil to be supplied will be refined mineral oil, with no inhibitory substances in its chemical composition and which must comply with the IEC 60354 and IEC 60296. h6. Current transformers Reactors will be supplied with current transformers built in the bushings, two cores, both for protection, in all windings and in the three phases. In addition, they will have current transformers for thermal image protection. i) Serial Compensation System
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