What is the function of the arrester The function of the arrester is .

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.

JSYF9 series discharge counter is a new product, suitable for various types of silicon carbide and zinc oxide arresters with voltage levels of 330kV and below, and the environmental conditions are the same as those of the connected arresters. JSYF9 discharge counter is a single-pointer ten-digit cyclic counting indication; JSYF9-S adopts the double-pointer electromagnetic counter that has won the national invention patent to do the counting indication, with the function of counting carry, which can continuously count 100 times and then enter the next cycle counting cycle, which is suitable for use in areas with frequent action of lightning arresters and unmanned duty places; Among them, JSYF9-SD type is a dual-function discharge counter, the main feature is to monitor the leakage current of the arrester, with a luminous alarm indication.

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

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.

Answer: C

Lightning arrester is an electrical appliance used by Songyuan to protect electrical equipment from high transient overvoltage hazards when lightning strikes, and to limit the freewheeling time and the amplitude of freewheeling. Surge arresters are sometimes referred to as overvoltage protectors, overvoltage limiters.