Oil filled transformers are common and important equipment in power systems, used to transform voltage for power transmission and distribution. In order to ensure its safe and reliable operation, the design of the transformer insulation system is crucial. Insulation grade is one of the indicators to evaluate the quality and performance of transformer insulation system.
Insulation grade refers to the voltage withstand capability of the transformer insulation material. It indicates the highest voltage that an insulating material can withstand without causing breakdown or damage. ๐ฐ๐๐๐๐๐๐๐๐๐ ๐๐๐๐ ๐๐ ๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐๐๐ ๐๐ ๐๐๐๐๐๐๐, ๐๐๐๐ ๐๐ ๐จ, ๐ฉ, ๐ช, ๐ซ, ๐๐๐. ๐ซ๐๐๐๐๐๐๐๐ ๐๐๐๐ ๐๐ ๐๐๐๐๐๐๐๐๐ ๐ ๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐๐๐๐, ๐๐๐๐ ๐๐๐๐ ๐ ๐จ ๐๐๐๐๐ ๐๐๐ ๐๐๐๐๐๐ ๐๐๐ ๐๐๐๐ ๐ ๐ซ ๐๐๐๐๐ ๐๐๐ ๐๐๐๐๐๐๐.
In oil-immersed transformers, the insulating materials mainly include insulating paper and insulating oil. Insulating paper is a special kind of paper with good insulation properties and high temperature resistance. Insulating oil is used to soak the insulating paper to provide additional insulation protection and cooling effect. The selection of insulation level should be based on the rated voltage and design requirements of the transformer.
Choosing the appropriate insulation level is critical to ensuring safe operation of the transformer. If the insulation level is too low, the transformer may breakdown at the rated voltage, causing equipment damage or even accidents. On the contrary, if the insulation level is too high, it will lead to unnecessary cost increase. Therefore, when selecting the insulation level, factors such as the rated voltage, environmental conditions, load requirements and expected life of the transformer need to be comprehensively considered.
In short, the insulation grade of oil-immersed transformer is an important factor in ensuring the safe and reliable operation of the transformer. Proper selection of insulation grade can improve the insulation performance of the transformer, extend the service life of the equipment, and reduce maintenance and replacement costs. Therefore, it is crucial for transformer manufacturers and operators to understand the characteristics and applicable scope of different insulation levels to ensure the normal operation of transformers in power systems.