Introduction
When it comes to protecting electronic devices from power surges caused by lightning strikes, there are two common types of systems that are often confused: lightning protectors and surge protection systems. While both are designed to provide protection from power surges and voltage spikes, they differ in their design, function, and effectiveness. In this article, we will delve into these differences to help you understand which one is best suited for your needs.
Definition
Let''s start by defining what each system is and their basic principles of operation.
A lightning protector is a device that provides a direct path for lightning energy to travel to the ground without passing through the protected equipment. It does this by providing a low impedance path for the lightning current to flow from the conductor to the ground. The protector is usually placed at the point where the conductor enters the building, and it can be installed in various ways, such as in-line with the conductor or integrated into the electrical panel.
On the other hand, a surge protection system is a device that protects electronic equipment from power surges by limiting the voltage that reaches the connected devices. It works by diverting the excess voltage away from the connected equipment and sending it to the ground.
Construction
One of the most significant differences between a lightning protector and a surge protection system is their construction and design.
A lightning protector usually consists of two components: a spark gap and a gas discharge tube. The spark gap is a small gap between two electrodes that creates a high electric field when it breaks down due to an overvoltage. When there is a lightning strike or a voltage surge, the spark gap becomes ionized, allowing the current to pass through it. The gas discharge tube, on the other hand, is filled with a special gas that ionizes when an overvoltage occurs. This creates a low impedance path for the current to flow from the conductor to the ground, thus protecting the equipment.
A surge protection system, on the other hand, has a more complex design and can consist of multiple components. The most common type of surge protection device is a metal oxide varistor (MOV) that is connected in parallel with the equipment to be protected. The MOV is a semiconductor that has a variable resistance, and its resistance decreases as the voltage across it increases. This means that when there is a voltage surge, the MOV absorbs the excess voltage by shunting it to the ground.
Effectiveness
When it comes to effectiveness, there are also some differences between a lightning protector and a surge protection system.
A lightning protector is very effective at preventing direct lightning strikes from damaging the connected equipment. However, it may not be the best option for protecting against voltage surges that are not caused by lightning strikes. This is because lightning protectors only provide protection for the conductor they are connected to, and they can only handle a limited amount of current. If the surge current exceeds the rated capacity of the protector, the excess current will flow to the connected equipment, potentially causing damage.
A surge protection system, on the other hand, is effective at protecting against a wide range of voltage surges, including those caused by lightning strikes, power outages, and other electrical disturbances. Surge protectors can absorb a large amount of energy from voltage spikes, and they can be designed to protect multiple pieces of equipment at the same time.
Cost
The cost of a lightning protector and a surge protection system can vary depending on several factors, such as the size of the system, the level of protection required, and the installation method. However, in general, a lightning protector is usually less expensive than a surge protection system. This is because lightning protectors are relatively simple devices that do not require a lot of components, while surge protection systems can be complex and require multiple protective circuits.
Conclusion
In summary, both lightning protectors and surge protection systems serve the same basic function of protecting electronic devices from power surges and voltage spikes. However, they differ in their construction, function, effectiveness, and cost.
If you live in an area with a high risk of lightning strikes, a lightning protector may be the best option for protecting your devices. However, if you want protection against other types of electrical disturbances, a surge protection system may be more suitable. Ultimately, the best choice for your needs will depend on your individual circumstances, and it''s always a good idea to consult with a professional electrician or electrical engineer before making a decision.
