Category | Characteristics | Unit | Value |
Mechanical Properties | Tensile strength(ring) | MPa | ≥900 |
Tensile strength(axial) | MPa | ≥55 | |
Compressive strength(longitudinal) | Mpa | ≥150 | |
Perpendicular to the bending | MPa | ≥120 | |
Vertical bending modulus of elasticity | MPa | ≥1.6X104 | |
Shear strength | MPa | ≥700 | |
Electrical Properties | Axial impact withstand voltage | - | 7KW/mm, 5 times |
Radial frequency withstand voltage | - | 8KW/mm, 1 min | |
Medium wearing factor(50Hz) | - | 7.65X10-3 | |
Relative dielectric constant(50Hz) | - | 5.59 | |
Partial discharge(35KW) | pC | ≤5 | |
Water diffusion test | - | 12KW, 1min | |
Sheet resistivity | Ω | ≥9.5X1014 | |
Volume resistivity | Ω.m | ≥6.0X1012 |
Technical parameter: | ||||
Item | Uint | Value | ||
Density | g/m³ | ≥2.0 | ||
Compression Strength | Mpa | ≥200 | ||
Bending Strength | Mpa | ≥320 | ||
Volume resistivity | Noemal when | Ωm | 1.0 x 1011 | |
After soaking | 1.0 x 109 | |||
Parallel layer to the insulation resistance | Noemal when | Ω | 1.0 x 1011 | |
After soaking | 1.0 x 109 | |||
Surface breakdown voltage after wettingin normal air for 1 min with gap between electrodes of 30mm | KV | ≥15 | ||
Vertical layer to the breakdown voltage ( in transformer oil of 90±2ºC)δ≤3mm δ> 3mm | MV/m | ≥18 | ||
Parellel layer to the breakdown voltage ( in transformer oil of 90±2ºC) | KV | ≥50 | ||
Dielectric loss factor 50 Hz | Min | ≤0.02 | ||
Water absorbtion rate | % | less than 0.02 |
Item | Thermal Grade | ºC | Characteristic |
3641 | Grade B | 130ºC | Mechanical and electrical applications, good heat resistance. |
G-10 | Grade B | 130ºC | Mechanical and electrical applications, good heat resistance. |
G-11 | Grade F | 155ºC | Mechanical and electrical applications, good heat resistance. |
FR-4 | Grade B-F | 130-155ºC | Flame resistance, mechanical and electrical applications. |