ABB Composite Insulators - Design for reliable performance (1HSM954308 03en)

In the event of an internal fault/ inner over pressure or external influence/ vandalism a porcelain insulator will show a violent failure (explosion) with dangerous fragments dashed around at high speed.

The failure mode of a composite insulator is delamination/ puncture without launching of destructive fragments. There is no damage of surrounding equipment and no danger for persons in the vicinity.

This gives maximum safety for both personnel and substation.

ABB produces hollow composite insulators by extruding silicone rubber sheds on to a composite tube using a patented helical extrusion process. These well-established manufacturing practices and improved material properties ensure reliable service over the life of ones electrical apparatus. ABB Composite Insulators with silicone rubber sheds offer many advantages over traditional ceramics:
•Improved safety for personnel and equipment
•Superior pollution performance due to hydrophobic surface condition
•Excellent seismic performance
•Low weight
•Short delivery times
•Flexible design

ABB Composite Insulators are normally used in:
•Circuit Breakers
•Bushings
•Instrument Transformers
•Surge Arresters
•Cable Terminations

ABB is currently providing hollow composite insulators in the voltage range 72 kV - 1200 kV and in lengths up to 15 m. All composite insulators are tested and certified according to IEC 61462.

For more information, please visit www.abb.com/composites