Classification and function of Surge Arrester

Surge Arrester is usually connected between the grid wire and the ground wire, but sometimes it is also connected near the electrical winding or between the wires. Surge Arrester is another important piece of equipment often used when communication cables are used to prevent lightning damage. Next, let's take a look at the classification and function of Surge Arrester. Here are some answers.

Here is the content list:

• Classification of Surge Arrester.

• The role of Surge Arrester.

Classification of Surge Arrester.

Surge Arrester falls into several types, these include Surge Arrester Metal Oxides, Linear Metal Oxides, Non-clearance Linear Metal Oxides, Fully Insulated Composite Coated Metal Oxides, and Removable Surge Arrester. The main types of Surge Arrester are tubular Surge Arrester, valve-mounted Surge Arrester, and zinc oxide. Each Surge Arrester works on a different principle, but their job is essentially the same: to protect communications cables and equipment from damage.

The role of Surge Arrester.

Surge Arrester is connected between the cable and the ground, usually in parallel with the protected equipment. Surge Arrester can effectively protect communication equipment. Once abnormal voltage occurs, Surge Arrester will act to protect it. When the communication cable or equipment is running under the normal working voltage, Surge Arrester will not affect, and it is regarded as an open circuit to the ground. Once high voltage appears and the insulation of the protected equipment is endangered, Surge Arrester will act immediately to direct the high-voltage impulse current to the ground, thereby limiting the voltage amplitude and protecting the insulation of communication cables and equipment. When the overvoltage disappeared, Surge Arrester quickly restored it to its original state, keeping the lines working.

Therefore, the main function of Surge Arrester is to clip the intrusion flow wave through the parallel discharge gap or nonlinear resistance, reduce the overvoltage value of the protected equipment, and protect the communication line and equipment. Surge Arrester can be used not only to protect against high voltages generated by lightning but also to protect against operating high voltages.

The role of Surge Arrester is to protect various electrical equipment in the power system from damage caused by lightning overvoltage, operating overvoltage, and power frequency transient overvoltage. The main types of Surge Arrester are protective gap, valve type Surge Arrester, and zinc oxide Surge Arrester. The protection gap is mainly used to limit atmospheric overvoltage, generally used in the distribution system, line, substation into the line protection. Valve-type Surge Arrester and Zinc Oxide Surge Arrester are used for the protection of substations and power plants. In systems of 500KV and below, they are mainly used to limit atmospheric overvoltage. In ultra-high voltage systems, they will also be used to limit internal overvoltages, or as internal Backup protection for overvoltage.

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