Arc extinguishing technology for arc resistance of dry transformer

In dry transformers, commonly used arc extinguishing technologies mainly include gas arc extinguishing, solid arc extinguishing and integrated arc extinguishing systems combining multiple technologies.
Gas arc extinguishing technology: This technology uses the characteristics of high-pressure gas to extinguish the arc. When an arc is generated, high-pressure gas is introduced into the arc area through a specific device, and the arc is quickly extinguished by the insulating properties and cooling effect of the gas. SF6 gas has been widely used in high-voltage electrical equipment due to its good arc extinguishing performance and chemical stability. However, SF6 gas has a potential impact on global warming, so its emissions need to be strictly controlled during use.
Solid arc extinguishing technology: This technology uses solid media with higher energy to extinguish the arc. When the arc contacts these solid media, it quickly converts the arc energy into heat or chemical energy, thereby extinguishing the arc. Solid arc extinguishing technology has the advantages of simple structure and high reliability, but attention should be paid to the thermal stability and chemical stability of the solid medium to ensure its long-term effectiveness.
Comprehensive arc extinguishing system: In order to further improve the arc resistance of dry-type transformers, some high-end transformers use a comprehensive arc extinguishing system. This system combines the advantages of gas arc extinguishing and solid arc extinguishing, and achieves rapid arc extinguishing by optimizing the arc path, enhancing arc cooling and insulation effects, and other means. The comprehensive arc extinguishing system also has intelligent monitoring and automatic control functions, which can monitor the operating status of the transformer and the arc generation in real time, and automatically start the arc extinguishing device when necessary to ensure the safe and stable operation of the transformer.