No

PROPERTIES

UNIT

STANDARD VALUE

1

Flexural strength perpendicular to lamination

Mpa

≥280

2

Notch Impact strength parallel to lamination (charpy)

KJ/m2

≥50

3

Dielectric strength perpendicular to lamination (in transformer oil 90±2°C)

KV/mm

≥10

4

Dilectric break down perpendicular to laminations(in transformer oil, 90 °C, less than 2mm in thickness)        

KV

≥9

5

dielectric coefficient(50Hz)

---

≤5.5

6

Volume resistivity  

Normal

Ω.m

≥1.0X1010

7

After the damp

≥1.0X109

8

Thermal rating

grade

H

9

Water absorption

Mg

28~85

10

Dielectric break down parallel to laminations((in transformer oil, 90 °C +2°C/1min)

kV

≥30

11

Insulation resistance parallel to laminations(after impregnated in water)

Ω

≥1.0 X 108

12

loss factor(1 MHz,after impregnated in water)

——

≤0.05