A thunder lightning arrester is a device used to protect electrical equipment from high transient overvoltages caused by lightning strikes, limit the duration of follow current, and also restrict the amplitude of the follow current. Sometimes it is referred to as an overvoltage arrester.
The arrester is a device that protects electrical equipment from transient overvoltages and can also cut off the follow current, preventing system grounding short circuits. It is a type of equipment that prevents lightning strikes by being connected between conductors and ground, usually in parallel with the protected equipment. Arresters can effectively protect power equipment. When there is an abnormal voltage, the arrester will act to provide protection, and once the voltage returns to normal, the arrester will quickly restore itself to ensure normal power supply to the system.
Arresters can be used not only to guard against atmospheric high voltages but also to protect against operational high voltages. In case of thunderstorms, high voltage may occur due to lightning strikes, posing a danger to power equipment. At this point, the arrester will act to protect the equipment from damage. The most critical and important function of the arrester is to limit overvoltage to protect electrical equipment.
High discharge capacity: The arrester can withstand high current surges, suitable for handling various lightning overvoltages, power frequency transient overvoltages, and operational overvoltages.
Excellent protective characteristics: Made from excellent materials such as zinc oxide, the arrester allows only microampere-level current under normal operating voltage but quickly conducts and interrupts overvoltage to protect the system when overvoltage occurs.
Good sealing performance: Arresters have excellent sealing performance, ensuring stable operation in harsh environments and extending service life.
Stable mechanical properties: They can withstand a certain degree of seismic force and wind pressure, ensuring safety under harsh natural conditions.
Good anti-pollution performance: They have high resistance to pollution and can maintain high performance under various environmental conditions.
High operational reliability: High-quality electrical lightning arrester product design and material selection ensure high reliability, with strong stability during long-term operation.
Strong power frequency withstand voltage capacity: They can effectively withstand power frequency voltage increases caused by single-phase grounding and other reasons in the power system.
TGE is focused on the research, development, production, and sales of zinc oxide resistor slices and lightning arresters. The company continuously promotes technological innovation, improves product performance, and is dedicated to providing reliable electrical protection solutions for customers.
They protect against transient overvoltages from lightning strikes, switching surges, and operational overvoltages, preventing insulation breakdown, equipment failure, fires, and system outages.
It is connected in parallel between the phase conductor (or line) and ground, usually near protected equipment like transformers or lines, to provide a low-impedance path for surges without affecting normal operation.
A surge arrester (synonymous with modern lightning arrester) is a device that limits voltage surges by discharging or bypassing surge current to ground, commonly using metal oxide varistors for reliable protection in power systems.
They offer high discharge capacity, excellent nonlinear characteristics (low leakage, fast response), superior sealing/anti-pollution performance, mechanical stability, high reliability, and strong power frequency withstand—making them ideal for harsh environments with minimal maintenance.
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