Baoding dry type transformer insulation structure and insulation material is to guarantee the reliability of the important indicators, due to the baoding dry type transformer structure is different. The main insulation material is different also, as for the baoding dry type transformer core used the grain orientation of cold rolled silicon steel sheet. Winding used in steel, aluminum conductor is also the same as the oil-immersed transformer. It is only the insulation of dry-type power transformer wire, the main insulation structure and other insulating materials. Therefore, the insulating materials used for the baoding dry type transformer are briefly introduced.
1. Aromatic polyamide fiber paper (Nomex)
Aromatic polyamide fiber paper is the main insulating material used in the conductor insulation of the impregnated type baoding dry type transformer. It belongs to high temperature resistant (H grade) synthetic fiber material.
Aromatic polyamide paper is linear polymers. There are hundreds of aromatic nucleus in the long molecular chain, the molecular weight of 6-120000, due to the main chain of the chain is completely composed of aromatic nucleus, and connected to the nitrogen atom of benzene ring instead of fat hydrocarbon, so the aromatic polyamide paper has the very high heat resistance; It remained in molecular chain amide chain. Thus has good physical and mechanical properties of aliphatic amide, also because the molecular chain, para structure. Can form high amorphous, so that the polymer has good dielectric stability.
Aromatic polyamide heat rating is class H insulation paper and cardboard, if baoding dry type transformer insulation heat resistant level for other level, such as class B, F, should choose corresponding heat resistant grades of insulating material.
2. The impregnating varnish
The dipping paint is divided into solvents and solvents. Impregnating varnish is mainly used for impregnating baoding dry type transformer winding. The aim is to fill the gap between the insulation and the micropore, impregnating varnish after baking curing, forming a continuous smooth in the surface of insulation film, and make the whole of the winding is bonded into a solid, improve insulation structure of resistant to moisture, thermal conductivity, mechanical properties and resistance to electric intensity.
Requirements for impregnated paint are usually:
(1) the viscosity is low. The solid content is high, which is convenient for painting and filling impregnation.
(2) the thick layer solidifies fast. Good drying, strong adhesion and thermal flexibility. After curing, it can withstand the effect of short circuit mechanical force.
(3) high electrical performance, moisture resistance, heat resistance, oil resistance and chemical stability, good compatibility of conductor materials and other materials.
3. The insulated
Casting insulation and insulation around baoding dry type transformer insulation, our country with epoxy resin as basic material, curing agents. Promoter and class F insulation system, made of casting and winding and insulation insulation the difference is only different process. When cured with epoxy resin, it is released without low molecular material, and a proper amount of defoaming agent is applied in the insulating gel. Thus, the day of air bubbles in the insulation is eliminated.
The insulating gel is similar to solvent-free paint, but the viscosity is generally added to the pouring insulation. With the improvement of epoxy resin and accelerant, the insulation is also developed in the direction of higher voltage grade products.
Billion in baoding electric materials co., LTD is specialized in the production of transformer baoding transformer factory manufacturers, with professional production equipment, hoisting, tooling and testing equipment, established a perfect quality management system, product performance indicators have reached the standard.
The company's main products: baoding dry type transformer, baoding box transformer, baoding oil immersed transformer, baoding high and low voltage complete equipment, etc. I companies to follow "detail decides success or failure, honesty molded the future" of the enterprise purpose, adhere to "quality measuring market, seek development by innovation, to management for efficiency" business philosophy, to make my company's products are widely used in power plant, chemical, construction, mining, metallurgy, rail transportation and other industries, to meet the needs of various users, my company rely on superior product quality, thoughtful service, won the trust of our customers.
