Externally Gapped Line Arrester
Externally gapped line arresters are an effective solution for protecting overhead lines against the effects of lightning. They are typically used in lightning-sensitive areas to boost the performance of lines.
Externally gapped line arresters (EGLAs) are classified based on their application. The main types in the industry include standard, composite, compact, parallel, and line-end externally gapped line arresters. The most popular type is the standard externally gapped line arresters.
The EGLA functions as a shield for protecting extra high-voltage operations. It has the ability to limit switching surges and lightning.
This surge arrester has a compact and adaptable design that is ideal for installation on a wide variety of configurations. Electric power companies use linemen and helicopters to install Externally gapped line arresters on overhead lines.
This product is highly customizable. The brand cannot only design and manufacture unique externally gapped line arresters but also test them for reliability.
Features
- Designed to withstand the toughest weather conditions for years
- Limits switching surges and lightning interruptions
- Engineered to deliver protection for unshielded and shielded lines
- Energy handling capability is limited to the EGLA’s charge transfer rating
- The brand provides custom EGLA designs with ratings of up to 765 kV
Related Products
What is an Externally Gapped Line Arrester?
An externally gapped line arrester is a device that routes a high-voltage lightning charge away from overhead lines and into the earth. It is a very viable equipment in handling overvoltage due to lightning surges.
How to Choose Externally Gapped Line Arresters?
Although EGLAs have the same design principle, they typically have different configurations. To pick the correct configuration, you must do the following.
- Define arcing distance, residual voltage, and energy rating
- Pick the correct gap distance that will effectively handle the lightning or switching voltage
- Decide on a suitable mechanical design
Important Applications of Externally Gapped Line Arresters
Externally gapped line arresters are used in applications that range from 2.4kV to 765kV. These applications include high-voltage transmission lines, distribution lines, substation protection, power equipment improvement, utility pole protection, and renewable energy installations. EGLAs are preferred for these applications because they are cost-effective, improve long-term stability and electrical performance, weigh less than NGLAs, and require minimal maintenance.
EGLA Types of Externally Gapped Line Arresters
All externally gapped line arresters have the same design principle. What differentiates one type from the other is intended applications. The most basic EGLAs are for standard 2.4kV applications, while the most advanced EGLAs are used in 765kV applications. In terms of specific applications, these products are classified as follows: transmission line, distribution line, station class, line terminal, hybrid, customized, and insulated externally gapped line arresters.
Main Function of Externally Gapped Line Arresters
Externally gapped line arresters protect the internal equipment of electrical systems. Such systems can include overhead transmission and distribution lines, conductors, and transformers. These devices protect electrical systems from overvoltage caused by lightning or switching.