Properties

Unit

F889

F863

Flexural strength

under normal

conditions

≥

MPa

280

280

E-1/150

150±5 °C

≥

MPa

—

—

Impact strength parallel to laminations

(Charpy)

≥

kJ/m2

40

40

Dielectric strength perpendicular to

laminations (in 90±2°C transformer

oil,1mm in  thickness)

≥

kV/mm

—

—

Breakdown voltage parallel to laminations (in 90±2°C transformer oil) 

≥

kV

—

—

Permittivity(48-62Hz)       

≤

—

—

—

Permittivity(1MHz)      

≤

—

—

—

Dissipation factor(48-62Hz)        

≤

—

—

—

Dissipation factor(1MHz)  

≤

—

—

—

Surface resistance  under normal conditions

W

—

—

Insulation resistance after impregnated in water

≥

W

—

—

Water absorption 1.6mm in thickness  

≤

mg

—

—

Density

—

g/cm3

≥2.8

≥2.8

Flammability

—

Class

—

—

Color

—

—

Gray

Gray

Reference standard

—

—

Q/TXXFR002-2009

Q/TXXFR003-2009