3240 is a national standard brand, corresponding to the EPGC201 type in IEC893-3-2 [1]. According to JB-T 2197-1996, Classification, Naming, and Model Compilation Method for Electrical Insulation Materials: 3240 Four Arabic Digits
The first '3' represents laminated products, winding products, and vacuum pressure impregnated products
The second digit '2' represents inorganic base laminate
The third digit "4" represents the temperature index level of 155 degrees Celsius
The fourth digit "0" represents the product variety code
