Based on temperature withstanding ability, classify insulating material.
class
|
Temperature withstanding ability in 0C |
Materials
|
Y
|
90
|
Cotton, silk paper and similar organic materials neither impregnated nor immersed in any oil, rubber, PVC.
|
A
|
105
|
Impregnated paper, silk, cotton, polyamides resins
|
C
|
120
|
Enameled wire insulations on base of polyvinyl formal, polyurethane and epoxy resins, molding etc.
|
B
|
130
|
Inorganic materials ( mica, fibre, glass, asbestos) impregnated with varnish and other compounds
|
F
|
155
|
Mica, polyester, epoxide varnishes with a high heat resistance
|
H
|
180
|
Composite materials on mica, fiber, glass and asbestos bases, impregnated with silicon rubber except other rubber compounds
|
C
|
Above 180
|
Mica, ceramics, glass, Teflon, quartz, etc.
|