Technological Innovation Of Pre-insulated Bushings To Create A "dry Experience"

In the power systems and industrial equipment sectors, pre insulated sleeve has become a crucial component of connection and protection structures. Unlike traditional insulation solutions that require oil or gas filling, the modern pre insulated junction sleeve features an internal solid insulation layer and an outer sheath, enabling the entire module to achieve insulation in a "dry" state. This trend is becoming increasingly clear in the latest technology and product discussions.

Structural Changes Brought About by Process Upgrades

The internal structure of insulated joint sleeve typically uses a cured material such as epoxy resin-impregnated glass fiber as the core insulation, forming a stable intermediate layer after molding. Subsequently, solid skirts and other insulation structures are formed on the outside. The overall encapsulation no longer relies on grease or gas. This process has been specifically implemented in the manufacturing of dry-type capacitor bushings.

This type of insulation structure means higher requirements for the size and sealing of the pre-insulated bushings on the production line, while also reducing the complexity of on-site operations. In the design, the surface of the bushing insulation core is usually first coated with a coupling agent, and then pressure is applied in the mold to cure and form a ring-shaped insulation layer.

Multi-layer Structure and Performance Breakdown

• Core Insulation Layer: Utilizing cured resin or reinforcing fiber materials, this gives the main insulator voltage withstand characteristics.

• Outer Sheath Layer: Forms an integral structural support around the core, contributing to improved mechanical strength of the bushing.

• Connection End Design: Standardized end geometry and sealing structure enable compatible installation with electrical equipment or pipelines.

This layered structure reflects the trend towards more convenient, environmentally friendly, and safer pre-insulated bushing solutions.

Construction and Field Experience Points

During field assembly, the design concept of dry-type pre-insulated bushings reduces reliance on external media. Installation teams can directly connect the bushing to other system components without handling potentially spilled oil or gas filling equipment, making the workflow more intuitive. Simultaneously, this solid-state insulation structure demonstrates stability even in environments with significant pressure variations.

Due to the pre-formed structure, transportation and storage are easier to manage, reducing the impact of external factors on the insulation layer. This design philosophy reflects, to some extent, the emphasis placed on practicality and ease of on-site operation in modern industrial products.