When it comes to protecting electrical systems from the damaging effects of lightning strikes and transient overvoltages, polymer lightning arresters are a popular and effective choice. However, with so many options available in the market, selecting the best polymer lightning arrester for your specific needs can be a daunting task. In this blog post, we will explore the key factors to consider when choosing a polymer lightning arrester, drawing on insights from industry experts and best practices.

 

A polymer lightning arrester is a device designed to protect electrical systems from overvoltages caused by lightning strikes and switching surges. Unlike traditional porcelain-housed arresters, polymer-housed arresters offer several advantages, including superior safety, lighter weight, and better resistance to environmental conditions.

One of the primary reasons to choose polymer-housed arresters is their enhanced safety. In the event of an overload, porcelain arresters can shatter and send high-velocity shards in all directions, posing a significant risk to nearby equipment and personnel. In contrast, polymer arresters are less likely to fragment, making them a safer option.

 

 

 

Before selecting a polymer lightning arrester, it is crucial to clearly define your application. Consider the type of electrical system you are protecting, its voltage level, and the specific components that need protection. Different applications may require different types of arresters, so ensure that the arrester you choose is compatible with your system.

The protection level of a lightning arrester is determined by its discharge voltage. Lower discharge voltage indicates better protection. When selecting an arrester, look for one with a low discharge voltage rating to ensure that it can effectively protect your equipment from overvoltages.

Not all polymer materials are created equal. When choosing a polymer lightning arrester, opt for one made from high-quality, durable polymer materials that have a proven track record in harsh environmental conditions. Reputable manufacturers will provide test reports and field experience to support the quality of their materials.

Moisture ingress is a significant concern for lightning arresters, as it can lead to reduced performance and premature failure. Ensure that the polymer arrester you select has excellent moisture resistance. While polymer materials are generally more moisture-resistant than porcelain, it is still essential to verify that the arrester has been tested and verified for this feature.

In the unlikely event that an arrester fails, it is crucial that it does so in a manner that does not endanger nearby equipment or personnel. Look for arresters with a proven fail-safe mode, and always request certified test reports from reputable laboratories to verify the claimed failure mode.

Choose a polymer lightning arrester that complies with relevant industry standards, such as IEC 60099-4 or IEEE C62.11. These standards ensure that the arrester has been tested and certified for its intended purpose, providing you with confidence in its performance.

The energy absorption capability of a lightning arrester is another critical factor to consider. Higher energy ratings are generally recommended for critical systems and areas with high lightning activity. Ensure that the arrester you select has an energy rating suitable for your specific application.

Lightning arresters often work in conjunction with other surge protection devices, such as transient voltage suppressors (TVS). When selecting an arrester, ensure that it can be effectively coordinated with other protection devices in your system to provide comprehensive protection.

Proper installation and regular maintenance are essential to ensure the effectiveness of a polymer lightning arrester. Choose an arrester that is easy to install and maintain, and always follow the manufacturer's guidelines for installation and maintenance procedures.

While it is important to prioritize protection, budget considerations are also a factor. Balance the cost of the arrester with the level of protection it provides. Remember that investing in a high-quality arrester can save you significant costs in the long run by preventing equipment damage and downtime.

 

Selecting the best polymer lightning arrester for your needs requires careful consideration of various factors, including application requirements, protection level, material quality, moisture resistance, failure mode, compliance with standards, energy absorption capability, coordination with other devices, installation and maintenance, and budget. By taking these factors into account and consulting with experts when needed, you can make an informed decision that ensures the safety and reliability of your electrical system.

 

Remember, the goal is not just to choose the cheapest or most readily available arrester, but to select one that offers the best protection for your specific application. With the right polymer lightning arrester in place, you can have peace of mind knowing that your electrical system is well-protected against the damaging effects of lightning strikes and transient overvoltages.

 

If you have any questions or need further guidance on selecting the best polymer lightning arrester for your needs, feel free to reach out to industry experts or consult the resources mentioned in this blog post.