Do You Know The Material Problem Of The Transformer
In view of the regulation and control role of the transformer in the power system, technicians must select a suitable transformer to complete the installation operation, so that it can play a normal role. Winding material is the primary issue that needs to be paid attention to when installing a transformer. Devices of different materials play different roles. For winding transformers, due to the special structure of the device, the installation uses materials such as enameled wire, yarn covered wire, silk covered wire, paper covered wire, etc., which can exert good electrical and thermal conductivity, and the superior corrosion resistance also enhances the circuit’s performance. stability. From the perspective of existing transformer products, the winding materials used in transformer installation generally include: iron core materials, insulating materials, impregnating materials, etc. The installer must choose according to the actual situation. [1]
(1) Iron core material. The transformer completes the regulation of current value and voltage value by means of the principle of electromagnetic induction, 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 to reduce the electrical and thermal conductivity of the low-steel sheet and avoid the increase in energy consumption after the device is running. Electric power industry standards stipulate that the magnetic flux density of silicon steel sheets should be controlled within the effective range. For example, the magnetic flux density of black iron sheets should be 7000, and that of low silicon sheets should be 10000. The installation site can be selected according to the actual situation. [1]
(2) Insulating materials. In recent years, the accident rate of transformer installation and operation has continued to increase. Considering the safety issues during the transformer installation process, 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 washers, insulating appliances, etc., but there are still safety risks due to improper human operations. Transformer installation needs to enhance its insulation performance in terms of isolation between coil frame layers and isolation between windings. [1]
(3) Impregnation material. The impregnation treatment is the final process of the winding material processing. The main purpose is to improve the material's mechanical properties, electrical properties, and insulation properties, and avoid various safety accidents in later use. After selecting the winding material, the installer shall paint the impregnating material and set an insulating layer on the surface of the material. The more commonly used lacquer is cresol varnish, which can play a better safety role after painting and prolong the service life of transformer equipment.
