Have you ever wondered how the inner structure of 2000 kva dry type transformer, dry cast resin transformers, dry resin transformer and so on dry type transformer looks like? Dry type transformers are mainly composed of iron core, heat dissipation system and coil. Dry-type transformer 'skeleton' is the iron core, by a piece of 0.35 mm thick silicon steel sheet like lasagna stacked and become, silicon steel sheet surface is also coated with ultra-thin insulating varnish, not only to ensure that each other insulated, but also to accurately guide the invisible magnetic susceptibility. Silicon steel is a typical 'electrical insulator + magnetic conductor', its resistivity is 10 times higher than ordinary steel, can significantly reduce the eddy current loss generated when the coil is energised, so that the efficiency of energy transmission is increased to more than 98%.
The high-voltage coil and low-voltage coil are the left and right hands of the transformer, with a clear division of labour. High-voltage coils are tightly wound with round copper wires with a diameter of 5-10 mm, specially designed to withstand ultra-high voltages of 10kV or even 35kV; low-voltage coils are usually made of thin, cicada-like aluminium foil or flat copper strips, layered on top of each other, to output a safe voltage of 400V. The epoxy resin wrapped around the surface of the coil is not an ordinary coating, and after curing, the hardness is comparable to bulletproof glass, which can not only isolate moisture and oxygen, but also 'lock' the loose coils firmly, and at the same time, like a heat-conducting adhesive, the heat is quickly transferred out.
Dry-type transformer in the natural heat dissipation type of coil design into a honeycomb hollow structure, the use of hot air rising principle, so that the air in the gap between the natural flow; forced air-cooled installation of high-power axial fan, when the temperature exceeds 80 ° C automatically start, the wind is equivalent to 10 sets of household fans work at the same time, quickly take away the heat; part of the high-end models in the coil embedded in the internal special heat pipe, with intelligent temperature control system, to achieve 'capillary level', and the heat will be transferred out quickly. Achieve 'capillary level' precise heat dissipation.