CLASSES OF INSULATION

Classes of insulation used for various motors
Type Y its maximum temperature is 90 C the materials used for insulator are cotton, silk, paper and similar organic material and combination of such material which are not impregnated nor immersed in oil.
Type A its maximum temperature is 105 C the above material impregnated with varnish or enamel or oil immersed.
Type E its maximum temperature is 120 C the material are comprises inorganic materials such as mica and glass.
Type B its maximum temperature is 130 C fiber materials are bestors or combination of these material in built up form with binding cement.
Type F its maximum temperature is 155 C Class b material when built up with suitable cement or binder.
Type H its maximum temperature is 180 C the main material are combination of mica, glass fiber and silicon elastomer with suitable binding, impregnating or coating substances as silicon resins.
Type C its maximum temperature is 180 C and above material such as mica, porcelain, glass quartz and asbestos with or without an inorganic binder.