Silicone is one of the most widely used polymers in the world. It is known as lubricating oil, baking molds and implants in breast surgery, among other things. In cable fittings, liquid silicone is used to insulate the electrical connection. What are the advantages of this? Below we have listed the most important features for you.
- ‘Wet’ insulation
The liquid silicone has the same insulating function as the cable grease of a GPLK cable. This ensures that the paper in the cable does not dry out and thus minimizes the chance of partial discharge - Low surface tension
The surface tension of silicone is lower than, for example, oil or water. This makes the liquid silicone mass spread more easily. In a cable joint, all cavities are filled and the electrical connection is perfectly insulated. - Curing on contact with moisture
Liquid silicone is water-repellent. In the unlikely event that moisture penetrates, the silicone hardens and forms a soft and perfectly insulating rubber. This creates a seal that prevents further moisture penetration. - Intrinsic field-steering properties
The dielectric constant of liquid silicone is almost the same as the insulation XLPE cables. This results in intrinsic field-steering properties that create a homogeneous permanent electric field. - High breakdown voltage
The liquid silicone has a breakdown voltage of 21 kV/mm. - Slows down aging
Liquid silicone is less sensitive to stress and therefore responds better to harmonic effects in the cable. As a result, aging occurs less quickly and the components last longer. - No carbon formation
After partial discharge, silicon dioxide is formed. This material is non-conductive and self-extinguishing, which prevents fire hazards. - Sustainable
Liquid silicone has a very long lifespan.
Liquid silicone has been used in Lovink Enertech’s LoviSil® cable joints for more than 30 years. It is not for nothing that these joints are protected against all soil influences and also tested at 2 bar water pressure. Want to know more about the LoviSil® technology? Look here.
