kylmäkutisteliitokset

Kylmäkutisteliitokset, known in English as cold shrink joints or cold shrink terminations, are a type of electrical cable accessory used for connecting and sealing medium and high-voltage cables. They are an alternative to heat shrink technology. The term "kylmäkutistua" refers to the material's property of shrinking back to its original size when the plastic spiral support is pulled away, a process that requires no external heat source.

The primary components of a cold shrink joint typically include a silicone rubber tube, a pre-expanded spiral spring, and sometimes integrated stress control elements and sealing skirts. When installed, the spiral spring is pulled out, causing the silicone tube to contract tightly around the cable and its terminations. This contraction provides mechanical protection and creates a waterproof seal, preventing moisture ingress and electrical breakdown.

The advantages of cold shrink joints include their ease and speed of installation, as they do not require special tools or heating equipment, making them suitable for use in hazardous environments or where power is unavailable. They offer good electrical insulation and mechanical strength, contributing to the reliability of cable systems. They are commonly used in power distribution networks, substations, and industrial applications.