... the structure of external pressure. Stator using material of insulation F, at the end there is a reliable fixed and banding ... fastening process. Wound Rotor using the materials of insulation degree F and using vacuum pressure impregnation materials and solvent-free process ... ,6,8,10,12,16,20,24 IP23~46,insul:B~FComparison of different series High Voltage motors No.Squirrel-cage ...