• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.
Disc Insulators Electricity Transmission & Distribution

Discover durable disc insulators for reliable power transmission. Explore our range for superior performance and longevity.

  • Standard : IEC 60383
  • Material : Brown Glazed Porcelain
  • Failing Load : 70 kN
  • Min. Creepage Distance : 295 mm
  • Wet Power Frequency withstand voltage (1 min) : 40 kV
  • Dry Lightning Impulse withstand voltage (1.2/50 µs ) : 110 kVp
  • Min. Power Frequency puncture withstand voltage : 110 kV


  • Consists of number of porcelain discs connected in series by metal links in the form of a string.
  • Conductor is suspended at the bottom end of the string and the upper part is connected to the cross-arm of the tower.
  • Number of discs depend on the working voltage.
  • The disc insulator shall be of open profile aerodynamic type to permit a large degree of self-cleaning by wind, rain, etc


  • Used for suspending and supporting high voltage transmission lines.
  • String does not become useless even in the event of damage of one disc.
  • Suspension arrangement provides greater flexibility to the line hence mechanical stresses is lesser on the insulator.