Porcelain insulator is one of the important parts of high voltage transmission and transformation equipment. Because of its strong water absorption on the glazed surface of porcelain bottle, it is easy to use.
Contamination is easy to form conductive film under weather conditions such as rain, fog and dew, resulting in pollution flashover and power failure.
The RJL-AF01 have excellent electrical properties, weather resistance and resistance.
Temperature and other properties are upgrading products of RTV coatings.
Typical Physical Properties
Typical properties of the uncured rubber: | ||||
Property | DLT 627-2004 Requirement | Value | ||
Appearance | No obvious impurity and flocculent | No obvious impurity and flocculent | ||
Tack free time | ≤45min（24℃） | 32min | ||
Curing time | ≤72h（24℃） | 49h | ||
Hydrophobicity | Hydrophobic
| θav≥100° θmin≥90° HC:HC1~HC2 | θav：117.0° θmin：104.0° HC:HC1 | |
Loss of characteristics
| θav≥90° θmin≥85° HC:HC1~HC2 | θav：108.4° θmin：97.2° HC:HC2 | ||
Migration characteristics
| θav≥110° θmin≥100° HC:HC1~HC2 | θav：124.6° θmin：106.7° HC:HC1 | ||
Recovery Time
| ≤24h | ＜12h | ||
Volume resistivity (Ω.cm) | ≥1.0*1014 | 2.70*1015-2.98*1015 | ||
Dielectric constant（100HZ） | εγ≤3.0 | 2.7-2.8 | ||
Dielectric loss | tgδ≤0.3% | 0.26-0.29 | ||
Dielectric | ≥18.0Kv/mm | 24.5-25.4Kv/mm | ||
Tracking resistance | ≥TMA2.5 | TMA4.5 | ||
Adhesion | ≥grade 2 | grade 1 | ||
Wear resistance
| ≤0.5g | 0.2947g | ||
Corrosion resistance | Chemical resistance | Under acid, alkali, salt, it should not fall off, Wrinkles, bubbles, discoloration, etc | Approved | |
Oil resistance | Under insulator, oil, it should not fall off, wrinkle, bubbles, discoloration | Approved | ||
Power frequency wet flashover voltage comparison
| After coating≥Before coating | After coating=54.5KV Before coating=50.0KV | ||
Typical properties are only for reference.