Performance Analysis Of Pre-insulated Bushings In High-temperature Power Facilities

Regarding electrical connections in extreme thermal environments, many workers often have questions: Can the pre insulated sleeve handle the stringent requirements of high-temperature electrical equipment? The answer depends on the chemical structure and physical properties of the material. In modern industrial power systems, bushings made of different materials exhibit significant differences in temperature resistance.

Material Structure and Thermal Stability Analysis

Conventional bushings typically use polyvinyl chloride (PVC) or ordinary polyolefins, with their operating limits often capped below 105°C. For electrical equipment operating at temperatures exceeding 150°C, pre insulated junction sleeve modified with a special cross-linking process must be selected. Through radiation cross-linking technology, the material's molecular chains transform from a linear to a three-dimensional network structure; this morphological change endows the product with excellent resistance to heat deformation.

Core Withstand Level Classification

• Basic Bushings: Primarily used in conventional building electrical systems, rated temperatures from 75°C to 105°C.

• Industrial Reinforced Bushings: Utilize Nylon 66 or polyvinylidene fluoride (PVDF), supporting continuous operation from 125°C to 150°C.

• Special High-Temperature Type: Combined with an inorganic fiber braided layer, its instantaneous thermal shock resistance can exceed 200°C.

Electrical Integrity under Environmental Stress

Inside high-temperature electrical equipment, long-term thermal stress can cause insulation layer aging and peeling. High-quality insulated joint sleeve maintains long-term stable dielectric strength by optimizing the fit between the inner wall and the conductor. This technical approach not only extends equipment maintenance cycles but also ensures the mechanical support of current-carrying components during complex thermal cycling.

It is strongly recommended to select a matching pre-insulating sleeve model based on the actual temperature rise curve to achieve full lifecycle reliability of the electrical system.