In power systems, cable accessories are a crucial link in ensuring stable power transmission, and a high-quality dedicated silicone rubber is the core to improving the performance of cable accessories. Recently, silicone rubber for cable accessories (HCR) has stood out in the production of indoor and outdoor cold-shrink terminals, sheaths, and other products, thanks to its advantages such as voltage resistance, high toughness, and easy processability, providing strong protection for power safety.
The core advantage of this silicone rubber lies in its excellent voltage resistance. It can withstand a breakdown strength of up to 24.3KV/mm, acting like a layer of "insulating armor" for cable accessories. Even when working in a medium-voltage environment for a long time, it can effectively insulate current and avoid risks such as leakage and short circuits. What's more noteworthy is that its dielectric constant is stably maintained at 3.03, and the loss factor is only 0.0029. This means extremely low power loss during power transmission, which not only ensures electricity safety but also improves energy utilization efficiency. It is particularly suitable for power scenarios with strict requirements on insulation performance.
Its characteristics of high tensile strength and high elongation make it superior in durability. During the installation and use of cable accessories, stretching, bending, and other situations are inevitable. This silicone rubber has a tensile strength of 10.0MPa, enabling it to withstand large tensile forces without breaking easily. Its elongation rate is as high as 700%—even when significantly stretched, it can quickly rebound and return to its original shape without permanent deformation. For example, for outdoor cold-shrink terminals, when harsh weather causes slight displacement of cables, the silicone rubber material can deform synchronously, tightly wrapping the cables at all times and preventing protective gaps caused by material cracking.
The injection molding processing method also brings great convenience to production. Traditional materials are difficult to mold and prone to problems such as bubbles and cracks. However, this silicone rubber is compatible with the injection molding process, which can accurately fill every detail of the mold and quickly produce cable accessories with complex shapes. This not only improves the product qualification rate but also significantly shortens the production cycle. At the same time, it has passed the RoHS test and does not contain harmful substances such as lead and mercury. It not only meets environmental protection requirements but also avoids pollution to soil and water sources, contributing to the construction of green power.
From the perspective of typical data, the two models HTV 8642 and HTV 8643 have stable performance, small permanent set at a given elongation, and their resistance to tracking and erosion reaches Level 1A3.5, enabling them to adapt to complex environments such as humidity and dust. Whether for terminal protection of outdoor high-voltage cables or sheath production of indoor cables, this silicone rubber can provide reliable support and serve as a "solid backing" for the safe operation of power systems.