Item

Unit

Index

Density

g/cm3

1.70～1.90

Flexural strength perpendicular to laminations

MPa

≥340

Impact strength parallel to laminations (Charpy)

kJ/m2

≥33

Dielectric strength perpendicular to laminations (in 90±2℃  transformer oil,1 mm  in thickness)

kV/mm

≥14.2

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

KV

≥35

Permittivity (48-62Hz)

-

≤5.5

Permittivity (1MHz)

-

≤5.5

Dissipation factor (48-62Hz)

-

≤0.04

Dissipation factor (1MHz)

-

≤0.04

Insulation resistance after immersion in water (D-24/23)

Ω

≥5.0×108

Water absorption (D-24/23, 1.6mm  in thickness)

mg

≤19