Hollow composite insulators

ABB currently provides hollow composite insulators ranging from 72 kV up to 1,200 kV AC and 1,100 kV DC, and in lengths up to over 15 meters. ABB’s product range is wide with more than 300 different composite insulators in production. Each composite insulator design is tailor-made to the customer’s requirements.

By choosing ABB Composite Insulator Technology, excellent performance and reliability can be assured for the lifetime of your equipment:

  • One piece tailored glass fiber composite tube - best mechanical and dielectrically performance
  • High temperature vulcanized (HTV) silicone rubber with high amount of aluminum rehydrate (ATH) filler - improved tracking and erosion performance and best long term performance
  • Seamless helical extrusion process for a continuous outer silicone housing - no mold lines where dirt or salt can accumulate
  • Optimized shed profiles with large shed tip radius and high protective creep age distance - lowest possible leakage currents and electrical field
  • High-strength aluminum end fittings - strong, gas-tight and leak-proof joint

Examples of applications in which ABB Composite Insulators are used:
  • High voltage circuit breakers (live tank and dead tank)
  • Outdoor instrument transformers (current and voltage)
  • Surge arresters
  • Cable terminations
  • Transformer bushings
  • Wall bushings
  • Gas insulated switchgear (GIS)
  • UHVDC / UHV station post insulators
  • Voltage dividers

Silicone rubber is the fastest-growing, most dominant polymeric insulation material for high voltage products. ABB Composite Insulators with silicone rubber offer significant benefits compared to the former porcelain technology:
  • Explosion-proof for maximum safety
  • Non-brittle material with reduced risk of handling damages
  • Leakage current control due to hydrophobicity
  • Excellent insulation for reduced creep age requirements
  • Flashover resistance
  • Outstanding seismic performance provides safety and reliability
  • Low weight for cost savings
  • Maintenance-free and outstanding pollution performance
  • UV stability

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