Porcelain Suspension Insulators


When our customers think of trouble free transmission insulators with the longevity to outpace life time expectations of the transmission lines supported, they think of porcelain suspension insulators from LAPP Insulators. With a proven track record of over 80 years of manufacturing, over 30 million units in service, and a reliability record that far exceeds that of similar glass insulators or other porcelain manufacturers, the suspension insulator from LAPP Insulators provides today's engineers something that is missing from many other manufacturers and products, peace of mind.

All suspension insulators from LAPP Insulators are manufactured to specifications developed utilizing decades of experience in leading technical advancements in the suspension insulator marketplace, resulting in rigorous standards exceeding ANSI and CSA. Each manufacturing lot is held to rigorous quality control standards and scrutinized by our quality control team to ensure continuous improvement in product performance under sample destructive testing. This strict attention to detail in manufacturing, materials, design and quality control results in a consistent, repeatable, and reliable insulator that once put into service provides our customers peace of mind.



  • Strength classes: 20,000 lbs. to 50,000 lbs
  • Hardware: Ball & Socket, Clevis / Tongue
  • Creepage distances: Standard and Fog Profiles
  • Corrosion resistant zinc sleeve available
  • Glaze Colors: ANSI 70, Brown, Dark Gray, Royal Blue


    Manufactured in accordance with

    • ANSI C29
    • CSA 411


    (Kopie 5)

    Special Applications available upon request 

    • Extra high strength 66,000 lbs & 90,000 lbs
    • Alternate creepage/shed profiles
    • DC designs
    • Silicone coating
    • IEC ratings
    • Available for use in porcelain horizontal vee assemblies
    • Color striping of hardware