Rain sheds enhance insulation on high-voltage cable terminations by increasing creepage distance and preventing flashovers. Moreover, they resist UV exposure and seal tightly using heat-shrinkable polymer. As a result, they perform reliably in harsh, polluted, and coastal environments. Rain sheds are ideal for use in substations, transformers, and outdoor switchgear. Additionally, their design ensures stable operation with minimal maintenance.
| Property | Test Method | Standard Value |
|---|---|---|
| Tensile Strength | ASTM-D-638 | ≥8MPa |
| Elongation at Break | ASTM-D-638 | ≥300% |
| Tensile Strength Variation After Heat Aging（130℃x168h） | ASTM-D-5510 | ≤±30% |
| Elongation at Break Variation After Heat Aging（130℃x168h） | ASTM-D-5510 | ≤±30% |
| Volume Resistivity | IEC 60093 | ≥1×1014Ω.cm |
| Dielectric Strength | IEC 60243 | ≥20kV/mm |
| Brittle Temperature | ISO 974 | -40℃ |
| Tracking Strength | IEC 60587 | 1A3.5 |
| Dielectric Constant | IEC 60250 | ≤5 |
| Heat Shock | 160℃，4h | No Crack |
| Water Absorption(23±2)℃ 24h | ISO 62 | ≤0.1% |
| Hardness（Shore A） | ISO 868 | ≥80 |
| D/mm(±5) | As Supplied（mm） | After Recovered | |
|---|---|---|---|
| Inner Diameter (d) (±5) | Inner Diameter (d) Max | Wall Thickness (W) (±0.4) | |
| 90 | 30 | 12 | 2.8 |
| 90 | 35 | 12 | 2.8 |
| 120 | 40 | 20 | 2.8 |
| 120 | 45 | 20 | 2.8 |
| 120 | 50 | 20 | 2.8 |
| 120 | 55 | 20 | 2.8 |
| 120 | 60 | 20 | 2.8 |
| 140 | 75 | 30 | 2.6 |
| 140 | 80 | 30 | 2.6 |
| Spec. | As Supplied（mm） | After Recovered | ||
|---|---|---|---|---|
| Inner Diameter (d) (±5) | Wall Thickness (T) (±20%) | Inner Diameter (D) Max | Wall Thickness (T) (±10%) | |
| WRSSQ-35/17 | 35 | 1.9 | 17 | 2.8 |
| WRSSQ-40/24 | 40 | 1.9 | 24 | 2.8 |
| WRSSQ-50/24 | 50 | 1.9 | 24 | 2.8 |
| WRSSQ-60/32 | 60 | 2.4 | 32 | 2.8 |
| WRSSQ-70/32 | 70 | 2.4 | 32 | 2.8 |
| Spec. | As Supplied（mm） | After Recovered | ||
|---|---|---|---|---|
| Inner Diameter (d) (±5) | Wall Thickness (T) (±20%) | Inner Diameter (D) Max | Wall Thickness (T) (±10%) | |
| WRSSQ-35/16 | 35 | 1.1 | 16 | 2.7 |
| WRSSQ-45/22 | 40 | 1.1 | 22 | 3 |
| WRSSQ-50/22 | 50 | 1.1 | 22 | 3 |
Rain Sheds are essential in high-voltage power systems, enhancing insulation by increasing creepage distance to prevent tracking and flashovers in harsh environments. Made from durable, UV-resistant polymeric materials, they repel moisture and contaminants to maintain system reliability. Easy to install with a heat-shrinkable design and optional mastic lining, Rain Sheds are ideal for substations, transformers, and outdoor switchgear in polluted or coastal areas.
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