Today’s interconnected ecosystem relies heavily on electrical systems for everything from work to daily living. Unfortunately electric systems are at risk from increasing lightning strikes and electrical surges; therefore lightning surge protection devices play an important role in protecting both electrical systems and the end user. What are lightning surge protectors? How do they work? Why is their use critical? To learn more about lightning surge protectors and their use in protecting electrical systems, read on.

What is a Lightning Surge Arrester?

Surge protectors (sometimes called lightning surge arresters) are devices designed to protect electrical equipment by diverting the excess voltage resulting from electrical surges (over-voltage) to the ground. Electrical surges or spikes can occur from various sources such as lightning strikes and switching operations.
Lightning surge arresters can help prevent high-voltage levels from moving through your system and damaging valuable machinery, fragile electronic devices or infrastructure.

How Does a Lightning Surge Arrester Work?

A lightning surge arrester operates by utilizing a straightforward, efficient technique. If large amounts of electricity exist in the surrounding area that exceeds an acceptable voltage level, the arrester creates low-resistance pathways so excess current can travel safely to the ground, without passing through electrical devices/devices that are connected to it. Surges and spikes in electricity are redirected to the ground through a lightning surge arrester. After the surge stops, the arrester returns to its original state of having high resistance, and therefore it does not affect your system’s operation. This process works well for devices to provide protection from both small & large amounts of current coming onto the system, including during a lightning storm.

Occasionally, a thunderstorm can create hazardous surges when lightning strikes near power lines and generates an electrical impulse. However, properly installed surge and lightning protection devices can quickly neutralize the dangerous surge before it has a chance to reach sensitive equipment downstream from the power line where the lightning struck.

Why Do We Need Lightning Surge Arresters?

The answers to this question are numerous and rooted in both cost efficiency and safety:

• Equipment Protection: Sensitive electronic devices, such as a computer or home appliance to a medical device or industrial equipment, can be damaged due to a power surge. Replacing or repairing this equipment can be quite costly.
• Maintain Business Continuity: When electrical surges disrupt a business’s operations due to equipment going down, it can result in lost sales. Using lightning arresters will help mitigate that risk.
• Avoid Storing Electrical Fires. A surge that is not protected can create potential hazards like overheating or sparking, which could turn into a fire hazard. Surge protectors will help keep you safe, while protecting you from these risks.

It is important to have lightning protection systems such as surge protectors for all types of buildings including homes, businesses and large manufacturing plants. This investment will help you avoid the expensive damages and disruptions associated with lightning strike.

Applications of Lightning Surge Arresters

Lightning surge arresters are versatile and are used in a variety of applications:

Power Transmission & Distribution: Utilities utilize surge arresters in Electrical Grids to Protect Transformers, Switchgear and Transmission Lines from Electrical Surge Events. Surge Protection is Extremely Important in Areas Where Storms are Regular Occurrences.

Residential homes have a large number of appliances, such as televisions, refrigerators, and HVAC systems, that are often protected from surge damage by the use of surge protectors.

Commercial and industrial properties use advanced lightning surge arresters to protect their operations, such as server rooms and manufacturing lines, from damage caused by surges.

Renewable Energy Systems: Solar panels and wind turbines are frequently located in exposed areas, making them at high risk for lightning strikes and requiring specific dedicated surge protection against these events.

Choosing the Right Surge Arrester

When selecting a lightning surge arrester, consider the following factors:

• When choosing a device, be sure that it matches the voltage rating, and by doing so, it will provide adequate protection for your system.
• Response Time: A fast-acting arrester is vital to handle transient overvoltages effectively.
• Durability: Look for products made from strong materials that have been tested to be able to survive repeated usage (surge) over an extended period of time.
• Standards Compliance: Purchase items that conform with International Standards, such as the International Electrotechnical Commission or the Institute of Electrical and Electronics Engineers for maximum dependability.

Frequently Asked Questions

How Does a Lightning Surge Arrester Work?

A lightning surge arrester provides a low-resistance path for excess electrical energy from a lightning surge to safely flow to the ground, so that no surges from lightning can go through the equipment it protects and cause damage.

Why Do We Need a Lightning Arrester?

Lightning surge arresters protect electronic and electrical devices from damage caused by surges in electric power; they help to ensure that operations will remain operational; as well as provide a fire hazard due to a surge in either electric power or electric current. The ultimate goal of a lightning surge arrester is to protect your equipment and your personnel by preventing damage and extending the life of your equipment.

Can Surge Arresters Be Used for Lightning Protection Alone?

Surge arresters do a very good job of protecting from transient surge activity, but a complete lightning protection solution may include other methods such as grounding electrode systems, bonding systems and additional shielding to protect from direct lightning strikes.

What is the Difference Between a Lightning Arrester and a Surge Protector?

Both types of equipment are capable of protecting against high voltage; although the purposes differ, each type has been designed specifically for that purpose. An arrestor for lightning is meant to be installed as close as possible to the transformer or line providing electrical service, with the goal of protecting the entire system from external lightning strik?es. A protector against spikes is installed directly on the device or appliance being protected to protect it against voltage surges, which can either come from a lightning strike or from internal power system fluctuations.

How Long Does a Lightning Surge Arrester Last?

An arrester’s lifetime can be influenced by several factors, including how many times it has experienced a surge and its manufacturing quality. High-quality surges manufactured for industrial or heavy-duty applications may provide many years of protection; however, regular inspections and tests should be performed as part of an arrester maintenance program to ensure continued operation effective.

Can a Lightning Surge Arrester Be Repaired?

Now, most current surge protection devices are made to be replaced instead of repaired. If the device has lost its surge capacity, you should replace it to maintain ongoing protection against surges.

Are There Different Types of Lightning Surge Arresters?

Yes, there are various types of lightning surge arresters, including:

• Station Class Arresters: These are high-capacity arresters designed for use in power substations.
• Intermediate Arresters: Generally used in distribution systems for moderate protection needs.
• Distribution Surge Arresters: Intended for use in homes and small businesses, offering basic surge protection.
• Secondary Arresters: Installed near individual devices for localized protection.

What Happens if a Lightning Arrester Fails?

When a lightning arrester fails, the electrical systems protected by it might be exposed to a surge, which could damage the systems, or cause serious hazards to safety. Therefore, regular maintenance and timely replacement of the lightning arresters are necessary for uninterrupted protection of electrical systems.

A lightning surge arrester is critical for protecting electrical systems from destructive overvoltage events. Protecting residential, industrial, and commercial facilities requires quality investments in this equipment to minimize the monetary loss related to surges. By examining their functions, applications, and selection criteria, individuals and companies can select the best product to help protect their electrical systems from disturbances caused by lightning or surges. As a result, if you don’t have a surger protector installed, now is the time to get one!