K-Line Distribution Silicone Insulators Riser Support 15 kV to 69 kV

October 15, 2026

On distribution overhead lines there are numerous tap-offs from the main line to provide connections to equipment (e.g., transformers, switches, fuses, underground cables, etc.) or lines (e.g., services, junctions, etc.). Normally leads are used to connect the equipment or line to the main line. These leads can be long and difficult or hazardous to operate. The use of riser support insulators can provide a safe and economical support for these leads.

K-LINE INSULATORS LIMITED (KLI) silicone riser support insulators are manufactured and tested in accordance with industry wide standards, CSA, ANSI and IEC. K-LINE INSULATORS LIMITED is registered to ISO 9001 Quality Systems.

Application

Distribution riser support insulators are used on distribution lines operating at or below 69 kV. These insulators are installed on metal, concrete or wooden structures, standoff brackets and cross arms to hold and insulate conductor leads.

Core Rod

The core rod of the insulator is made of a high quality, epoxy resin, E-Glass fiberglass rod that has been specially formulated for electrical and mechanical applications.

Housing

The housing (includes sheath and sheds) of the insulator is one-piece, high temperature vulcanized, injection molded silicone rubber that is chemically bonded to the core rod. This ensures that the interface between the rubber and rod is impenetrable against moisture ingress. KLI uses its own proprietary silicone rubber formula in the manufacture of its insulators. The formulation has silicone rubber as the base polymer material with additives to enhance its performance in wet and contaminated environments.

Fitings

The riser insulator comes standard with a clamp to hold the conductor and a threaded base for mounting to apparatus.

Conductor Clamp

The clamp is an aluminum clamp that can accommodate copper or aluminum conductors 5.0mm to 23.5mm (0.20” to 0.95”).

Threaded Base

The base is typically threaded for 5/8”-11, 3/4”-10, M16x2, or M20x2.5 galvanized bolt.

For other special clamp features or base threads please contact KLI.