Specification

The table above is just one of our product parameters. If you want more information, please get in touch with info@wishpower.net or download the file below.

What is Hollow Composite Bushing?

Hollow composite bushings are special insulating devices that safely provide high-voltage electricity in ground barriers of power systems, such as transformers, switchgear, or circuit breakers. These bushings are comprised of a hollow fiberglass structure, surrounded by a polymeric, typically silicone rubber, housing. This combination offers excellent electrical insulation while at the same time maintaining a very lightweight and robust structure capable of supporting strong mechanical and environmental stress. The bushing is designed hollow, which enables flexible installation with either conductors or other components to interest therein. The polymer housing is hydrophobic, preventing moisture from reaching the surface and reducing surface conductivity to prevent leakage current in high pollution areas or humid environments. Furthermore, the composite materials are also resistant to UV radiation, weathering, and temperature fluctuations for their long-term durability and little or no maintenance. They are far less likely to crack or shatter than traditional porcelain bushings, making them safer and more resilient in high-voltage environments where reliability, and electrical insulation stability, are paramount.

Composite Hollow Bushing VS Composite Hollow Insulator

Composite hollow bushings are used to guide the conductors safely through the ground barriers, such as the walls of transformers and other equipment, to provide insulation between the two and to permit electrical connection between neighboring system sections. Hollow composite insulators, commonly used to support and isolate live conductors on transmission lines or substations, typically do not facilitate the passage of the current through the ground barriers, while, on the contrary, are typically used to support and isolate live conductors on transmission lines or substations without passing of current through the ground barriers. The structural mode of operation of bushings involves an open interior for conductors, while insulators require only external insulation and empty cores for weight reduction and mechanical flexibility. Secondly, the material composition of bushings is optimized for not only the external environmental conditions but also for the internal electrical stresses encountered by conductors that pass through, generally more than for insulators. However, the durability and resiliency of composite materials afford both components – bushings for barrier penetration insulation and conductor containment, and insulators for carrying and separating high voltage lines – the optimal design for their role.

Benefits

1. Lightweight design:

Lighter than traditional porcelain bushings, hollow composite bushings have a lower load on the supporting structure and their transportation and installation are simpler.

2. Enhanced safety:

These bushings use composite materials, which are not prone to cracking or shattering, thus, will not cause dangerous fragmentation both when it is being installed or when being impacted.

3. Moisture and pollution resistance:

The polymer shell is naturally hydrophobic, repelling water, dirt, and other surface contaminants and further reduces the risk of surface leakage current in harsh conditions.

4. UV and weather resistance:

The intended use is to withstand long-term exposure to UV radiation, temperature variations, and bad weather, and finally to yield steady performance.

5. Electrical insulation stability:

The bushings have uniform insulation performance under high voltage and electrical stress and the internal structure minimizes electrical discharge between the ground barrier.

6. Low maintenance:

However, its durability and resistance to environmental degradation require little or no maintenance during the service life to keep the operating costs to a minimum.

Application

1. Transformer:

As it is widely deemed useful for high voltage conductors that travel through tanks with ground walls while retaining insulation and outletting the current, it is used in transformers.

2. Switchgear:

These bushings allow safe connection in high voltage switchgear systems between grounded enclosures to maintain the stability of critical distribution and control components in the equipment.

3. Circuit Breakers:

It serves as the insulator for conductors in circuit breakers so that they operate safely and reliably during the switching.

4. Gas Insulated Substations (GIS):

These bushings are designed to work in GIS environments with high voltages in a restricted area where the insulation is rugged and prevents arc fault under pressure.

5. Distribution Equipment:

Hollow composite bushings support insulated connections in areas with a wide range of distribution settings where they are often needed and provide a high level of reliability and safety for power transmission when exposed to high humidity, pollution, or extreme weather conditions.

Certificate

Factory

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