Porcelain power line insulators

Porcelain power line insulators can be divided into high voltage insulators, medium voltage insulators and low voltage insulators, suspension insulator and line post insulator is popular insulator used for power systems.

Porcelain power line insulators

The electromechanical propertied for Porcelain power line insulators
◆ Power frequency dry withstand voltage (RMS) ≥175kV
◆ Power frequency wet withstand voltage (RMS) ≥140kV
◆ Full-wave lightning impulse withstand voltage (peak) ≥290kV
◆ Contamination withstand voltage (rms) at 0.35mg / cm2 salt density: ≥31.5kV
◆ Rated bending failing load (kN) 12.0
◆ Rated tensile failure load (kN) 120
◆ Rated sliding load (kN) 40

Some requirements for Porcelain power line insulators
◆ Subjected to electric resistance to tracking and erosion test, to TMA4.5 level
◆ The maximum pitting depth of not more than 2.5mm
◆ Flammability FV-0 level requirements.
◆ The tensile strength of not less than 4MPa
◆ Mechanical tear strength of not less than 12kN / m
◆ Meet hydrophobic properties HC1, HC2-level requirements

Porcelain power line insulators can be designed in any voltage for supporting and insulating wires and conductors, the properties for Porcelain power line insulators are very important for insulator usage.


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