Insulator

Modular lightweight insulators consist of a solid polymeric core with a polymeric housing. Stainless steel threads can be threaded directly into the polymeric core without the use of bulky metal fittings. These insulators are ideal for use in outdoor equipment and can be designed according to specific customer requirements. Composite insulators was use for medium and high voltage applications. They consist of a polymeric housing over a pultruded fiberglass rod to which galvanized steel or aluminum end fittings
are attached. By molding directly over the end fitting, or by using a track resistant polyurethane, moisture ingress to the fiberglass rod is pre vented. Housing materials in either ethylene vinyl acetate or silicone are available depending on customer preference.
Porcelain insulators are the traditional choice for distribution line, busbar and apparatus insulation. Manufactured from high quality non-porous electrical porcelain, they provide a long life and cost effective solution for the majority of applications.

Composite insulators are available for applications up to system voltages of 110 kV. The core of a composite insulator is a pultruded fiber glass rod which provides a high mechanical strength. In a direct injection molding process a non-tracking, erosion and UV resistant polymeric housing is molded directly onto the fiberglass rod. A corrosion resistant metal end fitting is crimped onto each end of the rod to provide a high mecha nical strength. A new developed crimping control technology monitors the assembly process of the metal fittings and ensures that crimping forces cause no damage to the fiberglass rod while achieving a crimp that will withstand the highest possible mechanical loads. Sealed with a tracking and erosion resistant polyurethane barrier, the core is protected from deterioration due to moisture ingress. Composite insulators are available as tension (suspension), line post and station post insulators. For railway applications, tension and strut composite insulators are available in a large variety of configurations.

Composite suspension insulators
Composite post insulators on an overhead line switch
Modular lightweight insulators as stand-off insulators for MV terminations
Modular lightweight insulators in combination with surge arresters in overhead line fuseholders