Protecting Commercial Buildings: A Guide to Surge Arresters: The Ultimate Defense

0 453

Protect commercial buildings with surge arresters – a comprehensive guide for protection. Surge arresters are critical devices that safeguard commercial buildings from electrical surges, offering added protection to sensitive equipment and improving overall electrical system reliability.

Installing surge arresters is crucial in preventing damage caused by lightning strikes, utility faults, and other electrical disturbances. It is essential for building owners, facility managers, and electrical professionals to understand surge arresters’ importance, their types, and the installation process to effectively protect commercial buildings from potential electrical damage.

By implementing surge arresters, commercial buildings can ensure the safety and longevity of their electrical systems, minimize downtime, and avoid costly repairs.

Protecting Commercial Buildings: A Guide to Surge Arresters: The Ultimate Defense


Understanding Surge Arresters: The Basics And Importance

Protecting commercial buildings from electrical surges should be one of the top priorities for any business owner. Electrical surges can cause significant damage to the electrical systems of a building, leading to costly repairs, downtime, and potential safety hazards. One effective solution to safeguard against these surges is the use of surge arresters. In this article, we will delve into the basics of surge arresters, how they protect commercial buildings, and the importance of installing them.

What Are Surge Arresters?

In simple terms, surge arresters are devices that are designed to protect electrical systems from voltage spikes or surges. These surges can occur due to various reasons, such as lightning strikes, power fluctuations, or electrical faults. Surge arresters act as a barrier between the electrical supply and the building’s internal circuits, intercepting and diverting excess voltage away from sensitive equipment. They serve as the first line of defense against power surges, ensuring that electrical systems remain safe and operational within acceptable voltage thresholds.

How Do Surge Arresters Protect Commercial Buildings?

Surge arresters work by detecting the sudden surge in voltage and responding within nanoseconds to divert the excess energy. Let’s take a closer look at how surge arresters protect commercial buildings:

  1. Metal oxide varistors (MOVs): Surge arresters typically consist of metal oxide varistors (MOVs), which are voltage-dependent resistors. When the voltage exceeds the specified threshold, the MOVs quickly change their resistance to a very low value, allowing the excess current to flow through them rather than damaging the equipment or wiring connected to the building’s electrical system.
  2. Grounding: To ensure effective protection, surge arresters must be properly grounded. By providing a low-resistance path to earth, grounding facilitates the diversion of the excess voltage away from the building’s electrical system. This helps prevent any potential damage and ensures the safety of the occupants.

The Importance Of Surge Arresters In Safeguarding Electrical Systems

Surge arresters play a crucial role in protecting electrical systems in commercial buildings. Here’s why they are essential:

  • Equipment protection: Electrical surges can cause significant damage to sensitive equipment, including computers, servers, HVAC systems, and electronic devices. Surge arresters mitigate the risk of such damage by diverting excess voltage away from these devices, allowing them to function optimally without encountering power disruptions or failures.
  • Reduced downtime and costs: By preventing damage to electrical systems, surge arresters help minimize downtime and costly repairs. Businesses can avoid interruptions in their operations and the associated financial losses by ensuring reliable power supply and protecting their assets from the impact of electrical surges.
  • Fire prevention: Electrical surges can generate heat that may lead to fires if left uncontrolled. Surge arresters help in preventing such fire hazards by regulating the flow of excess voltage and minimizing the risk of overheating and associated electrical accidents.

Installing surge arresters in commercial buildings is a proactive measure that can save businesses from the potential consequences of electrical surges. It is essential to consult with a qualified professional to determine the appropriate surge arrester system for your specific needs and ensure its proper installation to maximize protection and maintain the efficiency of your electrical systems.

Types Of Surge Arresters For Commercial Buildings

When it comes to protecting commercial buildings from voltage surges and power disturbances, surge arresters play a crucial role. They act as the first line of defense against high-energy surges, ensuring the safety of electrical systems and preventing damage to sensitive equipment. Surge arresters come in various types, each designed to cater to specific requirements and offer optimal protection. In this guide, we will explore the different types of surge arresters suitable for commercial buildings and their benefits.

Classifying Surge Arresters Based On Technology

Surge arresters can be classified based on the technology they employ to suppress electrical transients. The two primary types of surge arresters commonly used in commercial buildings are:

  • Metal-oxide surge arresters
  • Gapless surge arresters

Metal-oxide Surge Arresters: A Reliable Choice For Commercial Buildings

Metal-oxide surge arresters, also known as MOV (Metal-Oxide Varistor) surge arresters, are widely used in commercial buildings due to their robust performance and reliability. These surge arresters consist of a ceramic body in which metal oxide grains are dispersed and connected between electrodes. When a surge occurs, the voltage across the arrester increases, causing the metal oxide grains to shift from their insulating state to a conducting state. This rapid transformation redirects the excessive surge energy away from the protected equipment, safeguarding them from potential damage.

Gapless Surge Arresters: Advantages And Applications

Gapless surge arresters are another type commonly employed in commercial buildings. As the name suggests, they are designed without a spark gap and provide continuous protection against surges. Gapless surge arresters offer several advantages, including:

  • Enhanced reliability: The absence of spark gaps minimizes the risk of failure due to aging or contamination.
  • Improved protection: Gapless surge arresters provide better protection against fast-rising surges and repetitive voltage transients.

These surge arresters find applications in various areas, such as:

  1. Medical facilities: Protecting sensitive medical equipment from electrical disturbances is crucial for patient safety and uninterrupted healthcare services.
  2. Data centers and IT facilities: Data centers house critical IT infrastructure, and any disruptions caused by surges can result in data loss, downtime, and financial losses.
  3. Commercial buildings with advanced automation systems: Surge protection is vital in buildings equipped with automation systems to ensure the reliability and longevity of the technology.

Factors To Consider When Choosing Surge Arresters

Protecting commercial buildings from electrical surges is crucial to ensure the safety of sensitive equipment and systems. Installing surge arresters is an effective way to prevent damage caused by voltage surges. However, when choosing surge arresters for your commercial building, there are several important factors to consider. These factors will help you ensure that the surge arresters you select are compatible with your electrical system requirements, properly installed and maintained, and suitable for the specific lightning protection zones of your building.

Surge Arrester Voltage Ratings: Matching The Electrical System Requirements

The voltage rating of surge arresters is a critical factor to consider when choosing the right surge protection for your commercial building. It is essential to match the voltage rating of the surge arrester to your electrical system requirements.

Surge arresters with higher voltage ratings are designed to handle larger surges and are suitable for buildings with high electrical demand. On the other hand, surge arresters with lower voltage ratings are ideal for buildings with lower electrical loads.

To determine the appropriate surge arrester voltage rating, it is essential to assess the electrical capacity of your building. Consider factors such as the total power demand, number of electrical panels, and the type of equipment connected to the system. It is recommended to consult with a professional electrical engineer or a qualified surge protection specialist to ensure the correct voltage rating is selected.

Surge Arrester Installation And Maintenance Considerations

Proper installation and regular maintenance are vital for ensuring the effectiveness of surge arresters in protecting commercial buildings. When selecting surge arresters, consider the installation and maintenance requirements.

For installation, ensure that surge arresters are installed in compliance with the manufacturer’s guidelines and industry standards. Proper grounding of the surge arresters is critical to divert the excess surge current safely. In addition, consider the installation location of the surge arrester to minimize wiring distances and maximize protection.

Maintenance plays a crucial role in the longevity and reliability of surge arresters. Regular inspection and testing are important to identify any signs of damage or degradation. It is essential to follow the recommended maintenance intervals provided by the surge arrester manufacturer.

By adhering to proper installation practices and regular maintenance, you can maximize the performance and lifespan of surge arresters, ensuring effective protection for your commercial building.

Selecting Surge Arresters Based On Lightning Protection Zones

Lightning protection zones classify areas of a commercial building based on the level of exposure to direct lightning strikes. Each zone requires a different level of surge protection. When choosing surge arresters, it is crucial to consider the specific lightning protection zones of your building.

Zoning can be divided into four categories: LPZ 0, LPZ 1, LPZ 2, and LPZ 3. LPZ 0 represents areas exposed to direct lightning strikes, such as the outdoor environment, while LPZ 3 refers to the least exposed zones, such as interior rooms.

Based on the overall lightning protection system (LPS) design, surge arresters are selected accordingly for each zone. Surge arresters installed in LPZ 0 and LPZ 1 have higher current-handling capabilities to divert excessive currents from direct lightning strikes. Conversely, surge arresters in LPZ 2 and LPZ 3 may have lower current-handling capabilities, as the risks of direct strikes are reduced.

To determine the appropriate surge arresters for each lightning protection zone, it is essential to consult with an LPS designer or a qualified surge protection specialist. They will assess the specific requirements of your building and help select surge arresters that provide optimal protection for each zone.

Surge Arrester Installation And Maintenance Best Practices

In order to effectively protect your commercial building from electrical surges, it is crucial to ensure proper surge arrester installation and maintenance. By following the best practices outlined below, you can maximize the protection offered by surge arresters and prolong their lifespan.

Proper Installation Guidelines To Maximize Protection

When it comes to installing surge arresters, it is important to adhere to the following guidelines:

  1. Make sure to install surge arresters at the entrance point of your electrical system to protect against external surges.
  2. Strategically place surge arresters throughout the building, at key points in the electrical system, to safeguard against internal surges.
  3. Ensure that surge arresters are installed in parallel to the equipment they are meant to protect.
  4. Follow the manufacturer’s instructions regarding proper wiring connections to maximize the effectiveness of surge arresters.

Ensuring Correct Mounting And Grounding

Mounting and grounding surge arresters plays a vital role in their performance. To ensure correct mounting and grounding:

  • Use sturdy brackets or mounts to securely fasten surge arresters to walls or mounting boards.
  • Ensure that the grounding electrode conductor is properly connected to the surge arrester’s grounding point.
  • Keep the ground connection as short and direct as possible.
  • Regularly inspect the mounting and grounding connections to detect any signs of wear or damage.

Utilizing Surge Arresters At Strategic Points In The Electrical System

For optimal protection against surges, it is important to strategically place surge arresters in your electrical system. Consider the following points:

  • Install high-quality surge arresters near sensitive equipment such as computers, servers, and other electronics.
  • Protect critical circuits, such as those powering emergency systems or vital equipment, with surge arresters.
  • Place surge arresters at branch circuit panels to safeguard against surges originating from within the building.

Routine Maintenance Procedures To Ensure Optimal Performance

To maintain the optimal performance of surge arresters, follow these routine maintenance procedures:

  1. Regularly inspect surge arresters for any signs of physical damage, corrosion, or disconnection.
  2. Clean surge arresters to remove any dirt or debris that may affect their performance.
  3. Check the labels and markings on surge arresters to verify their specifications and ensure they are still within their useful lifespan.
  4. Perform visual inspections for any signs of overheating, such as discoloration or distortion.

Regular Inspections And Testing

In addition to routine maintenance, it is essential to conduct regular inspections and testing of surge arresters. This helps identify any potential issues before they can cause damage. Follow these steps:

  1. Visually inspect surge arresters for any signs of physical damage or degradation.
  2. Perform electrical testing using specialized equipment to verify the surge arrester’s performance and effectiveness.
  3. Document the inspection and testing results for future reference and comparison.

Replacing Surge Arresters When Necessary

Surge arresters have a limited lifespan, and it is important to replace them when they reach the end of their useful life or show signs of failure. Keep the following in mind:

  • Refer to the manufacturer’s guidelines to determine the expected lifespan of surge arresters.
  • Replace surge arresters that have exceeded their useful lifespan.
  • Replace surge arresters that show signs of physical damage, overheating, or degraded performance.

Surge Arrester Testing And Certification: Ensuring Reliability

When it comes to protecting commercial buildings, surge arresters play a critical role in safeguarding electrical equipment from damaging power surges. These devices act as the first line of defense, diverting excess voltage and preventing it from reaching sensitive equipment.

However, not all surge arresters are created equal. To ensure their reliability and effectiveness, surge arresters must undergo thorough testing and certification procedures. In this section, we will explore the standard testing procedures for surge arresters, the recognized certifications to look for when purchasing these devices, and the importance of third-party testing in verifying surge arrester performance.

Standard Testing Procedures For Surge Arresters

Before surge arresters can be deemed fit for use, they must undergo rigorous testing to assess their performance and reliability. The following are the standard testing procedures that surge arresters must adhere to:

  1. Leakage Current Test: This test evaluates the insulation level of the surge arrester by measuring the current leakage under normal operating conditions. It ensures that the arrester effectively diverts surge currents without leaking excessive current.
  2. Voltage Withstand Test: In this test, surge arresters are subjected to voltage levels higher than their rated voltage to verify their ability to withstand overvoltage conditions. It gauges the arrester’s capability to handle extreme voltage surges without breakdown.
  3. Energy Handling Capability Test: Surge arresters are subjected to multiple surge currents of increasing magnitudes to evaluate their ability to dissipate energy. This test assesses the arrester’s capacity to handle continuous surges without getting damaged.

Recognized Certifications To Look For When Purchasing Surge Arresters

When purchasing surge arresters, it is crucial to look for recognized certifications that validate their quality and reliability. The following certifications are highly regarded within the industry:

  1. IEEE C62.11: This certification is issued by the Institute of Electrical and Electronics Engineers (IEEE) and ensures that the surge arrester meets the industry’s performance standards and requirements.
  2. UL 1449: The Underwriters Laboratories (UL) certification verifies that the surge arrester complies with safety and performance standards set by the UL.
  3. IEC 61643: The International Electrotechnical Commission (IEC) certifies that the surge arrester adheres to global standards for overvoltage protection devices, ensuring its compatibility and effectiveness.

Importance Of Third-party Testing In Verifying Surge Arrester Performance

Third-party testing plays a crucial role in ensuring the performance and reliability of surge arresters. Unlike in-house testing conducted by manufacturers, third-party testing provides an unbiased assessment of the arrester’s capabilities and adherence to industry standards.

By undergoing third-party testing, surge arresters gain an extra layer of credibility, assuring customers that the device has been evaluated by an independent entity. This verification process instills confidence in the arrester’s ability to deliver reliable surge protection.

Additionally, third-party testing helps identify any design flaws or weaknesses in surge arresters, allowing manufacturers to rectify them before the products are released into the market. This proactive approach ensures that only surge arresters with optimal performance and reliability reach the hands of consumers.

Frequently Asked Questions For Protecting Commercial Buildings: A Guide To Surge Arresters

Do Commercial Buildings Need Surge Protection?

Yes, commercial buildings need surge protection to safeguard electronic equipment from voltage spikes. Surge protectors help prevent damage to devices and ensure uninterrupted operation. Installing surge protection can save money by preventing costly repairs and downtime.

What Are The Requirements For A Surge Arrestor?

Surge arrestors have specific requirements to ensure their effectiveness. These include proper voltage rating, response time, and continuous current ratings. It is also important to consider the type of surge (voltage, current, or combination) and the environment where the surge arrestor will be installed.

Adhering to these guidelines will help ensure the surge arrestor functions properly and protects your electrical equipment.

How Does A Commercial Surge Protector Work?

A commercial surge protector works by diverting excess electrical voltage away from sensitive equipment, preventing damage caused by power surges. It uses built-in components like metal oxide varistors (MOV) to absorb and dissipate the excess energy. When a surge occurs, the protective device kicks in to safeguard electrical devices.

Where Must The Surge Arrester Be Placed?

The surge arrester should be placed close to the equipment it is meant to protect, ideally within one meter. This ensures it can effectively divert excess voltage and protect against power surges.


To ensure the protection of commercial buildings from power surges, surge arresters play a crucial role. These devices effectively divert excessive electrical energy and safeguard valuable equipment. By implementing surge arresters, businesses can prevent costly damages and downtime. With their ability to handle high voltage transients, surge arresters offer a reliable solution for surge protection.

Investing in this technology is a proactive approach to securing commercial buildings and ensuring uninterrupted operations. So, don’t wait any longer, take the necessary steps to protect your commercial building today.

Leave A Reply

Your email address will not be published.