Item | Uint | Value |
Density | g/ cubic centimeters | more than 1.9 |
Compression Strength | Mpa | more than110 |
Shearing Strength | Mpa | more than 25 |
Bending Strength | Mpa | more than210 |
Bending Strength(Circumference) | Mpa | more than 400 |
Air tightness | Gas pipe | Mpa | 2.94 | No leak |
Oil pipe | 58.8 |
Surface breakdown voltage after wettingin normal air for 1 min with gap between electrodes of 30mm | KV | more than15 |
Parallel to laminate breakdown voltage ( in transformer oil of 90±2ºC) | KV | more than 25 |
Perpendicular to laminate breakdown voltage (in transformer oil of 90±2ºC,5min wallthickness 4mm ) | KV | more than 22 |
Dielectric loss factor 50 Hz | | less than0.01 |
Leakage current (between gap of 500mm at 40 kv dc500mm40KV | MA | less than 1 |
Content of fiberglass | % | 70 |
Water absorbtion rate | % | less than 0.02 |