Halogen-free flame retardant epoxy resin composition and dry type transformer poured by same

Abstract

The invention provides a halogen-free flame retardant epoxy resin composition and a dry type transformer poured by the same. The transformer comprises a base, an iron core which is vertically arranged on the base and transformer coils, wherein an upper iron core clamps are arranged above the transformer coil; lower iron core clamps are arranged between the position below the transformer coil and the base; halogen-free flame retardant insulating cushion blocks are respectively arranged between the upper iron core clamps and the transformer coil and between the lower iron core clamps and the transformer coil; the transformer coil comprises a halogen-free flame retardant foil type winding and a halogen-free flame retardant coiling winding; each transformer coil is supported by halogen-free flame retardant foil type coil supporting board, a halogen-free flame retardant iron core clamp insulating piece is arranged between the upper iron core clamp pieces; a conductive copper bar is arranged on the lateral face; and a hanging ring and a pin are further arranged on the upper iron core clamp. According to the transformer provided by the invention, an insulating material is flame-retardant; the burning capacity of a non-metal part is very low; and no smoke exists in high-temperature combustion, and toxic substances are not decomposed, so that no environment pollution is caused, security and environmental friendliness can be achieved.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant composite material technology, in particular to a halogen-free flame-retardant epoxy resin composition and a dry-type transformer cast into it. Background technique [0002] With the wide application of epoxy resin cast dry-type transformers in urban buildings, public places and residential areas, more and more stringent requirements are put forward for the safety and environmental protection of dry-type transformers. In addition to the metal materials used in the manufacture of epoxy resin cast dry-type transformers, the insulating materials used are basically polymer materials, and most of these organic polymer insulating materials composed of carbon, hydrogen, oxygen and other elements burn There are high decomposition heat, relatively large amount of smoke, and easy to produce irritating, corrosive and toxic gases. Cast resin dry-type transformers must pass three performance tests, namely clim...

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Problems solved by technology

Chinese patent CN102181128 discloses an epoxy resin premix, including epoxy resin, color paste, aluminum hydroxide, epoxy resin high-efficiency flame retardant, methyl tetrahydrophthalic anhydride and accelerator, which can be used for casting dry-type transformers, But did not announce the high-efficiency flame retardant composition of epoxy resin

[0008] Halogenated flame retardants commonly used in industry are widely used, but their disadvantages are that they produce toxic and corrosive smoke and gas pollute the environment when they burn, and deteriorate the physical-mechanical properties of resin substrates, especially the impact resistance.

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