The uncompromising backbone of the Quadri*Sil product line is our materials development and advanced technology. With experts in a wide field of research, HPS continues to offer solutions through rigorous analysis - thermal and mechanical - and a commitment to material innovation.
We invite you to learn more about the superior materials
and advanced technology that are setting a new pace
for transmission insulators.
Corona Shielding Ring (CSR)
The patented Quadri*SilTM end-fitting design provides superior electric field shielding of the silicone rubber adjacent to the end-fitting. The superior shielding protects the silicone rubber on applications where an external corona ring is not required.
Direct Bond
The silicone rubber material is bonded directly to the fiberglass core rod during the molding process. The resulting bond between the silicone rubber and fiberglass rod is mechanically stronger than the tear strength of the silicone rubber.
Crimp Method
A circumferential crimp creates a more uniform stress distribution to ensure the mechanical integrity of the Quadri*SilTM insulator. Ohio Brass pioneered the crimping process in 1976 - today it has become the industry standard.
Polymer Weathersheds
The polymer weathershed material utilized in the Quadri*SilTM insulator design is a proprietary silicone-rubber compound specifically designed by Ohio Brass engineers for high-voltage insulator applications. The polymer weathershed material starts with 100-percent base silicone rubber before additives and fillers are compounded with the base rubber. Hubbell Power Systems (HPS) controls the entire process from the proprietary formulation to the complete mixing process. The proprietary formulation incorporates the inherent hydrophobicity and UV performance of silicone rubber while providing superior tracking performance as demonstrated in dry-band arcing tests.
Fiberglass Core Rod
The Quadri*SilTM suspension insulator's fiberglass core rod is produced with boron-free, corrosion-resistant E-glass and epoxy resin. Quadri*SilTM line post insulators are manufactured with electrical grade glass and epoxy resin.
End Fittings
Made of steel or ductile iron, the end-fittings are directly attached to the fiberglass core rod by a circumferential crimping process. This crimping process allows the end fittings to utilize the rod's inherent tensile strength.
Grading Rings
Also known as corona rings, grading rings are manufactured using high-grade aluminum alloy, making them strong, light, and corrosion-resistant. Grading Rings provide voltage grading along the insulator and are recommended at applications of 220 kV and above.
