Epoxy Resin Cast Dry-Type Power Transformer

This series of dry-type power transformers are used to directly reduce 35KV electrical grid power supply to 400V distribution power supply for users and omits the stage of 10KV transmission and transformation., which significantly decreases operating costs and engineering construction costs of multi-level substation projects, and have significant social benefits. By optimizing the structure of the high-voltage coil, the distributions of voltage and capacitance between layers are improved, which greatly enhances the impact resistance of products to withstand atmospheric over-voltage and operating over-voltage, as well as improves the electric field distribution and further reduces the partial discharge volume of product.

Technical Parameter of Epoxy Resin Cast Dry-Type Power Transformer

Executive Standard: IEC60076 & National Standard

Low loss: The no-load loss of the product is more than 20% lower than that of the SCB11 product, with excellent energy-saving effect, economical operation and maintenance-free.

Low noise: The noise level of the product is more than 10-15 decibels lower than the current professional standard JB/T10088-1999 6-220KV Transformer Sound Level.

Low partial discharge: The resin mixed material adopts two technologies of foreign advanced stirring method and vacuum film degassing, so that the mixed material is stirred evenly and the air bubbles in the mixed material are eliminated. The product has only a very low partial discharge, which can be controlled below 5PC. Both high and low voltage coils are cast under vacuum and pressure, so that the resin insulation has both full encapsulation and inter-turn leaching. The casting body has a dense solidified structure, which is resistant, explosion-proof and does not pollute the environment.

Insulation materials such as glass fiber wrapped around the coil have self-extinguishing properties, and will not generate arcs due to short circuits, and the resin will not produce toxic and harmful gases under high heat.

High mechanical strength: The resin with filler makes the difference of the expansion coefficient of the casting body small, the curing shrinkage rate is small, the internal stress is small, and the hardness of the cured product is high. The prefabricated reinforcing material has a dense structure like reinforced concrete, so its mechanical strength is greater than that of pure epoxy resin, and it can withstand sudden short-circuit electrodynamic action without damage.

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