What does a surge arrester do? Does anyone know?

A lightning arrester is used to protect electrical equipment from high transient overvoltage hazards when lightning strikes, and to limit the freewheeling time, and often to limit the freewheeling amplitude.

The most primitive lightning arrester is a sheep's horn gap, which appeared in the late 19th century, and was used for overhead transmission lines to prevent lightning from damaging equipment insulation and causing power outages, so it is called "lightning arrester". In the 20s of the 20th century, aluminum arresters, oxide film arresters and pill arresters appeared.

Tubular arresters appeared in the 30s. Silicon carbide arresters appeared in the 50s. In the 70s, metal oxide arresters appeared.

Modern high-voltage arresters are used not only to limit the overvoltage caused by lightning in the power system, but also to limit the overvoltage caused by the operation of the system.

The arrester connects the ** cable and the earth, usually in parallel with the equipment being protected. It can be used not only to protect against the high voltage generated by lightning, but also to protect against the high voltage of operation. The function of the lightning arrester is to protect various electrical equipment in the power system from lightning overvoltage, operating overvoltage, power frequency transient overvoltage and damage caused by electrical appliances.

The main types of arresters are protective clearance, valve-type arresters and zinc oxide arresters.

The protection gap is mainly used to limit atmospheric overvoltage, and is generally used for the protection of power distribution systems, lines and incoming line sections of substations. Valve arrester and zinc oxide arrester are used for the protection of substations and power plants, and are mainly used to limit atmospheric overvoltage in 500kV and below systems, and will also be used to limit internal overvoltage or backup protection of internal overvoltage in ultra-high voltage systems.

Recommended brands of arresters; Minrong Electric.

I myself is doing arresters and other high-voltage business, opened a physical store, my store customers are designated to buy the brand of Minrong, I put the store a few days ago to the 17 45 model arrester to take a picture of ** to send here to show you also by the way to their address also to you, you need to go to see, I hope to help you.

The function of the arrester is: when the road is subjected to lightning strike high voltage, the lightning arrester resistance value will become very small, so as to introduce the lightning strike high voltage into the ground and release it to avoid damage to the line equipment. At the same time, it will also cause an instantaneous loss of pressure on the line.

Lightning protection, which directs lightning directly to the earth to avoid causing damage to other objects.

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<> function of lightning arrester is as follows: the role of lightning arrester 1, used to protect electrical equipment from high transient overvoltage hazards when lightning strikes, and limit the freewheeling time, also often limit the freewheeling amplitude of an electrical appliance, lightning arrester is another important equipment often used when the communication cable is prevented from lightning damage.

2. It can ensure that the interior of the electrical appliance is not damaged, and its main material is zinc oxide. Surge arresters are usually connected between the grid wires and the ground wire, and sometimes next to the windings of the appliance or between the wires. 3. The AC gapless metal oxide arrester has excellent nonlinear voltammetry characteristics, good response characteristics, no freewheeling, large flow capacity, low residual voltage, strong ability to suppress overvoltage, pollution resistance, anti-aging, not constrained by altitude, simple structure, no gap, tight sealing, long life and other characteristics.

4. Under the normal system working voltage, the arrester presents a high resistance state, only the micro-ampere current passes, and it presents low resistance under the action of overvoltage and high current, thereby limiting the residual voltage at both ends of the arrester.

The function of the arrester is to limit the overvoltage acting on the equipment to protect the electrical equipment.

The arrester is designed according to the voltage level, and must not be installed wrongly, mainly when a certain section of the line generates excessive voltage, it can be absorbed to achieve the purpose of safe operation of the line. For example, there is a set of lightning arresters in the inlet cabinet, which can protect the safety of the line in the cabinet; When the external power supply enters the cabinet, it is already equipped with a lightning arrester, so if the external power supply generates high voltage, it is safer to enter the cabinet due to the lightning arrester for protection; There is a lightning arrester at the lower end of the outlet cabinet, which is mainly due to the overvoltage phenomenon when the vacuum circuit breaker is opened and closed, so the arrester must be installed to replace the overvoltage absorber.