Technical Specifications
| Parameter | Specification |
|---|---|
| Lamp Type | Water-cooled xenon arc, 1.8-6.5 kW |
| Irradiance Control | 340nm or 420nm narrow-band control |
| Black Panel Temperature | BPT 50-100 deg C |
| Humidity Range | 20-95% RH (with spray) |
| Specimen Tray | Rotating drum, 20+ specimens |
| Applicable Standards | ISO 4892-2, ASTM G155, IEC 62217 |
Key Features
- Full-spectrum xenon arc — closest match to natural sunlight
- Automatic irradiance control compensates for lamp aging
- Light and dark cycle programming with rain spray simulation
- Rotating specimen drum for uniform exposure
- Real-time monitoring of BPT, chamber temperature, and humidity
Why UV Aging Matters for Insulator Performance
Polymer insulator housings (silicone rubber, EPDM) are exposed to intense UV radiation throughout their service life. UV exposure causes chain scission, cross-linking, and oxidation of polymer molecules — leading to surface cracking, chalking, loss of hydrophobicity, and eventual electrical failure. Xenon arc testing provides accelerated aging data that predicts long-term outdoor performance.
IEC 62217 Weathering Requirements
IEC 62217 specifies that composite insulator housing materials shall be subjected to 1000-5000 hours of xenon arc exposure depending on the test severity class. Post-exposure evaluation includes visual inspection, hardness measurement, and hydrophobicity testing to verify the material retains its protective properties.
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