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What is Electric Pylon Insulator?

Date:2024-04-25Tags:transmission towers,hydro towers,Electric pylons,Polymer Pin Insulators,Suspension Insulators
electric pylons, also known as transmission towers, are used to support high-voltage overhead power lines. insulators made of materials like porcelain or toughened glass are used to attach the overhead lines to the pylons while preventing the steel towers from becoming live.the main types of electrical insulators used on electric pylons include:


  • pin insulators: these are made of ceramic/porcelain material and are used to support and insulate electrical conductors in power distribution systems like 11 kv.
  • post insulators: made of fiber and aluminum, these provide good insulation performance, excellent weatherability, and high heat resistance. they are easy to install and widely used for different voltage classes.
  • polymer pin insulators: also called composite polymer or silicone rubber insulators, these are made of materials like silicone rubber. they are used in overhead power distribution lines up to 33 kv and can withstand cantilever loads of 5-10 kn.
  • suspension insulators: for voltages greater than 33 kv, a string of glass or porcelain discs connected by metal links is used. these hollow insulators have the conductor inside them.

    • the insulators are designed to provide mechanical support and insulation to the overhead lines while preventing current leakage to the pylons. factors like voltage, environmental conditions, and mechanical stresses determine the type of insulator used. proper installation and maintenance of these insulators is crucial for the safe and reliable operation of the power transmission system. so, let's continue to the next part...how to install and maintain electric glass insulators properly?


    electric pylons glass insulators - installation:

  • ensure proper allotment and installation of the insulators according to design requirements, with each tray of the optical fiber cable installed in the appointed part of the route and laid according to the chart operation file.
  • establish an installation and engineering plan for the insulators, adopting the tension pay-off method to maintain suitable tension and prevent cable abrasion on the ground.
  • install necessary hardware and accessories, such as tension clamps, suspension clamps, vibration dampers, earth wires, downlead clamps, cable trays, and joint boxes.
  • perform optic fiber splicing and whole process testing to ensure the integrity and performance of the insulator system.


    • high-voltage overhead power lines - maintenance:

  • regularly inspect insulators from a safe distance using binoculars or a camera to identify any signs of damage, contamination, or degradation.
  • implement frequent cleaning methods, such as water washing or blasting, to remove contaminants and reduce the risk of flashovers, while addressing safety and potential damage concerns.
  • employ creepage extenders and rtv coatings to prevent pollution flashovers on insulators, particularly in contaminated environments.
  • invest in long-term solutions like rtv coatings to save on maintenance and repairs, improving system performance and safety.
  • strictly adhere to safety precautions when handling high voltage glass insulators, including wearing appropriate ppe, de-energizing equipment, and following lockout/tagout procedures.

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