Composite insulator to the insulating sheath, an umbrella skirt material requirements: a)
Climate resistance to prevent ozone, ultraviolet light, moisture, high and low temperature caused by rapid degradation;
High tracking and erosion resistance to prevent the formation of conductive channels and sheath, umbrella skirt breakdown, should meet the GB/T 19519. 5.
The requirements of article 6;
Sheath, umbrella skirt composite insulator
material flame retardant and ac dielectric strength test should meet the GB/T 19519 5 respectively.
Article 5 and DL/T 864 -
Composite insulator material of sheath, umbrella skirt of hydrophobic should satisfy DL/T 864 -
2003 appendix A request;
Composite insulator high tear strength in order to prevent the damage when handling and installation, its mechanical tensile strength, tearing strength should meet the DL/T 864 -
Article 3 d)
Composite insulator high hydrolysis resistance in order to prevent the increase of conductivity, volume resistivity of the umbrella cover material should comply with the DL/T 864 -
Article 3 a)
In the large temperature difference can maintain a high flexibility, to prevent a sharp change in low temperature and temperature when cause crack or rupture.
To ensure the effectiveness and persistence of mandrel protection, connection interface (
Jacket, jacket -
Must be of high quality.
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