Our in house testing lab are well equipped with all latest equipment’s to carry out all the routine and acceptance tests for composite insulator including  incoming raw materials  test such as Silicone Rubber, epoxy resin, glass roving’s, FRP Rods, End fittings & Sealants etc. as per IEC: 61109 and RDSO specification.

Tracking & Erosion High Voltage Thermo Mechanical Chamber UV Weathering Tensile Testing


Tests on Silicone Rubber:

  • Specific gravity test.
  • Tensile and elongation.
  • Tear Strength
  • Hardness ( Shore A)
  • Tracking & Erosion Test
  • V and Weathering Test
  • Dielectric Strength
  • Volume Resistivity

Tests on FRP Rods

  • Visual Examination
  • Dimension Check
  • Specific Gravity
  • Glass Content
  • Water Diffusion Test.
  • Dye Penetration Test
  • Water absorption Test.
  • Brittle fracture resistance test.
  • Bending moment test,
  • Tensile strength test.
  • AC high voltage test

Test on End Fittings

  • Visual Examination
  • Dimension Check
  • Thickness of Zinc Coating
  • Uniformity of Zinc Coating
  • Mass of zinc costing.
  • Dimensional test

Test on Composite Insulator.

  • Visual Examination
  • Dimension Check
  • Routine Electrical Test up to 200 kV,
  • Routine Mechanical Strength Test up to 300 kN.
  • Galvanizing test


Beside above we have also thermo mechanical chamber and water immersion bath for design test.