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HEPR Medium Voltage Cable Insulating Rubber Compound
HEPR Medium Voltage Cable Insulating Rubber Compound
The rubber compound carry out the regulation of IEC60092-351:2004 high hardness HEPR, mainly used for ships cable insulating layer. & nbsp; Performance comparison Test item Unit IEC60092-351:2004（HEPR） Test value Before…
Product Details
The rubber compound carry out the regulation of IEC60092-351:2004 high hardness HEPR, mainly used for ships cable insulating layer.
& nbsp;
Performance comparison
| Test item | Unit | IEC60092-351:2004（HEPR） | Test value | ||
| Before ageing | Tensile strength | Intermediate values | MPa | ≥8.5 | 10.6 |
| Elongation at | Intermediate values | % | ≥200 | 340 | |
| Heat ageing test of air box | Aging conditions | Temperature | ℃ | 100±2 | |
| Time | h | 7×24 | |||
| Tensile strength | Intermediate values | MPa | — | — | |
| Rate of change | % | ≤±30 | 12 | ||
| Elongation at | Intermediate values | % | — | — | |
| Rate of change | % | ≤±30 | -9 | ||
| Air bomb ageing test | Test conditions | Temperature | ℃ | 127±2 | |
| Time | h | 40 | |||
| Tensile strength | Rate of change | % | ≤±30 | 18 | |
| Elongation at | Rate of change | % | ≤±30 | -10 | |
| Hot set test | Test conditions | Temperature | ℃ | 250±3 | |
| Load time | min | 15 | |||
| Mechanical stress | MPa | 0.2 | |||
| Load elongation | % | ≤175 | 20 | ||
| Permanent deformation after cooling | % | ≤15 | 5 | ||
| Ozone resistance test | Test conditions | Temperature | ℃ | 25±2 | |
| Time | h | 24 | |||
| Ozone concentration | % | 0.025～0.030 | |||
| Test results | No cracks | No cracks | |||
| Hardness IRHD b | ≥80 | 85 | |||
| 150% elongation modulus | MPa | ≥4.5 | 5.0 | ||
& nbsp;
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