What are the materials of the transformer?
Transformer material
In view of the regulation and control function of the transformer in the power system, technicians must select a suitable transformer to complete the installation operation, so as to play a normal role. The winding material is the most important thing to pay attention to when installing a transformer. Devices made of different materials play different roles. For winding transformers, due to the special structure of the device, materials such as enameled wire, yarn-covered wire, silk-covered wire, and paper-covered wire are selected for installation, which can exert good electrical and thermal conductivity, and the superior corrosion resistance also enhances the circuit. stability. From the perspective of existing transformer products, the winding materials in transformer installation generally include: iron core materials, insulating materials, impregnating materials, etc., and the installers must choose according to the actual situation.
(1) Iron core material. The transformer uses the principle of electromagnetic induction to regulate the current value and voltage value, and the iron core is the core component of the transformer, and its material condition determines the regulation function of the transformer. The iron core material is best to add silicon to the iron sheet, so as to reduce the electric and heat conduction effect of the low steel sheet, and avoid the increase of energy consumption after the device is running. The electric power industry standard stipulates that the magnetic flux density of silicon steel sheet should be controlled within the effective range, such as: the magnetic flux density of black iron sheet is 7000, and that of low silicon sheet is 10000, etc. The installation site can be selected according to the actual situation.
(2) Insulating materials. In recent years, the accident rate of transformer installation and operation has been increasing continuously. Considering the safety issues during transformer installation, on-site personnel need to pay attention to the selection of insulating materials to protect the normal operation of other equipment in the system. At present, many transformers have been equipped with insulating components, such as gaskets, insulating appliances, etc., but there are still safety risks due to improper human operation. Transformer installation needs to enhance its insulation performance from the aspects of isolation between layers of coil frame and isolation between windings.
(3) Impregnated material. Impregnation treatment is the last process of winding material processing, the main purpose is to improve the mechanical properties, electrical properties and insulation properties of materials, and avoid various safety accidents in later use. After selecting the winding material, the installer should paint the impregnated material and set an insulating layer on the surface of the material. The more commonly used paint material is cresol varnish, which can play a better safety role after painting and prolong the service life of transformer equipment.