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V2210 Oil Varnished Silk
It is manufactured by high quality silk refined and trimmed, and then impregnated with oil insulation varnish uniformly, finally to be cured and dried off to oil varnished silk for electrical purpose. Its thermal Class is A, with electrical and mechanical properties,and suitable for wrapping and lining insulation of motors and electrical applicnces. |
Thickness and its tolerance
| Nominal Thickness ( mm) |
Tolerance ( mm) |
|
0.08, 0.10 |
±0.010 |
|
0.12, 0.15 |
±0.015 |
Technical Requirement
Tensile strength
Nominal thickness(mm) |
Tensile strength N/10mm width |
|
Lengthwise |
Crosswise |
In the directon of 45° |
|
Medium |
Min. |
Medium |
Min. |
Medium |
Min. |
|
0.08 |
≥22 |
≥16 |
≥15 |
≥10 |
≥15 |
≥10 |
|
0.10 |
≥24 |
≥18 |
≥17 |
≥12 |
≥17 |
≥12 |
|
0.12 |
≥25 |
≥20 |
≥18 |
≥14 |
≥18 |
≥14 |
|
0.15 |
≥30 |
≥24 |
≥22 |
≥18 |
≥22 |
≥18 |
Elasticity(the tension when nominal elongation is 6%)
| Nominal thickness(mm) |
Elasticity |
|
Medium value of tension for the nominal elongation （N） |
Max. value of tension for the nominal elongation（N） |
|
0.08 |
2~10 |
11 |
|
0.10 |
2~12 |
14 |
|
0.12 |
3~12 |
14 |
|
0.15 |
3~14 |
17 |
Volume resistivity
| Volume resistivity, (Ω·m) |
|
23±2℃ |
105±2℃ |
After being humidified for 24h. |
|
≥1.0×1011 |
≥1.0×108 |
≥1.0×108 |
Shrinkage: ≤1%, after treated at temperature of 105±2℃ for 6h.
Thermoplasticity: After treated at temperature of 70±2℃ for 24h, the film shall not be felted and detached from the silk.
Breakdown voltage
| Item |
Nominal thickness ( mm) |
|
0.08 |
0.10 |
0.12 |
0.15 |
|
Breakdown voltage (kV) ≥ |
|
medium |
Min. |
medium |
Min. |
medium |
Min. |
medium |
Min. |
|
At room Temp. 23±2℃ |
4.8 |
2.4 |
5.8 |
3.8 |
7.2 |
4.8 |
8.7 |
5.2 |
|
After bending under 23±2℃ |
3.0 |
1.8 |
4.4 |
2.2 |
6.3 |
3.2 |
6.9 |
3.8 |
|
At high Temp.105±2℃ |
3.0 |
1.8 |
4.3 |
2.2 |
5.2 |
2.5 |
5.8 |
3.1 |
|
After bending thougth heat treatment |
2.5 |
1.4 |
3.7 |
1.7 |
4.0 |
2.1 |
4.2 |
2.7 |
|
After being humidified for 24h |
2.3 |
1.4 |
3.5 |
2.0 |
4.1 |
2.5 |
4.7 |
2.8 |
|
Elongation by 6% (In the direction of 45°) |
2.7 |
－ |
4.1 |
2.1 |
5.0 |
2.5 |
6.1 |
3.1 |
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