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HENAN WEICHI Transformer Co., Ltd.

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Epoxy resin cast dry transformer

Epoxy resin cast dry transformer

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A. Technical advantage


Coil


1.1 High and low voltage coils use foil winding technology


Improve the lightning resistance and short-circuit resistance of the transformer. It guarantees that the transformer is not damaged under extreme system conditions.


1.2 high and low voltage coil full vacuum casting technology


Improve the environmental applicability of the transformer. This technology enables our company to pass three tests on environmental resistance, combustion resistance and weather resistance on the same product.


1.3 high and low voltage coil casting using the United States Huntsman with a filled epoxy resin system, glass fiber reinforced, bubble-free casting under vacuum conditions. The two major advantages of this technology: 1. The thermal expansion coefficient of the insulation system is very close to the conductor, completely eliminating the internal stress of the coil due to temperature rise when the transformer is running. Therefore, the coil has excellent resistance to temperature changes and crack resistance. 2. The filler in the resin makes the coil easier to dissipate heat and flame retardant. Ensure the transformer is safe and environmentally friendly.


1.4 The excellent insulation barrel is placed between the high and low voltage coils to ensure greater insulation margin between the windings, and the transformer is more compact and safer to operate.


1.5 High and low voltage coils use honeycomb airway technology to avoid turbulent flow of hot air, which makes the coil have better heat dissipation capacity and stronger overload capability. Improve the reliability of transformer operation.


2. Iron core


2.1 The core is made of high-quality high-magnetic cold-rolled oriented silicon steel sheet with 45° full-cutting.


Stepped stacking structure. The transformer's no-load loss is reduced by about 20% compared to the national standard.


2.2 The heart column is tightly and firmly tied with high-strength binding straps, and the noise is 10-15dB lower than that of domestic similar products.


2.3 iron core plate clamp


It ensures better heat dissipation of the coil and improves the overload capability of the transformer.


2.4 coil and iron core are fixed by elastic butterfly spring structure


Effectively reduce the noise during the operation of the product.


B. High-precision machining and inspection hardware advantages


1. German HEDRICH vacuum pouring equipment


The vacuum degree can reach 0.1 mbar, ensuring no bubble generation during the casting process, so that the partial discharge of the coil is much less than 5pC, which effectively guarantees the service life of the coil.


2. Belgium SOENEN silicon steel sheet automatic shearing machine


The shearing error of the silicon steel sheet is within 0.01 mm, so that the air gap at the iron core lamination is smaller and the core no-load loss is lower.


3. Germany STOLLBERG high-pressure foil winding machine, Italy L.A.E low-pressure foil winding machine uses infrared positioning, argon arc welding. The coil is processed and accurate.


4. Swiss HAEFELY partial discharge meter


Accurately check the quality of the coil casting and judge whether it is partially or not.


C. Strong design management software advantages


1. Design drawings are designed using AUTOCAD 3D software


All designs are simulated on a computer to increase the efficiency of the design.


2. Management adopts ERP system


Achieve refined management, making the production process transparent and lower cost.


3. Drawings into the warehouse using the PLM system


The design is more standardized and the management is more scientific.


D. Product advantages


1. Wide range of products


Transformer products cover all voltage levels of 35KV and below, which is convenient for users to choose.


2. Complete product range


In line with the market energy-saving needs, our company has various capacity transformers of SCB10 series and SCB11 series, and can be specially designed according to user requirements.



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