The main function of lightning arrester is to reduce the amplitude of inrush current wave through parallel discharge gap or nonlinear resistance, thus reducing the overvoltage value of protected equipment, thus protecting communication lines and equipment. Lightning arrester can be used not only to protect the high voltage generated by lightning, but also to protect the operating high voltage.
Lightning protection zone is a kind of lightning arrester, which is generally laid horizontally or obliquely (depending on the inclination of the roof). At least two places (the head end and the tail end) of the down conductor are connected with the down conductor, which is usually exposed, but can also be hidden under the concrete or tiles on the roof.
Extended data:
1, lightning arrester is connected between the cable and the earth, usually in parallel with the protected equipment. Lightning arrester can effectively protect communication equipment. Once an abnormal voltage occurs, the lightning arrester will act and play a protective role. When the communication cable or equipment operates under normal working voltage, the lightning arrester will not work, which is regarded as an open circuit to the ground.
2. When high voltage occurs and endangers the insulation of the protected equipment, the lightning arrester will act immediately to guide the high-voltage surge current to the earth, thus limiting the voltage amplitude and protecting the insulation of communication cables and equipment. After the overvoltage disappears, the lightning arrester quickly restores to its original state, making the communication line work normally.
3. Therefore, the main function of lightning arrester is to reduce the amplitude of inrush current wave through parallel discharge gap or nonlinear resistance, thus reducing the overvoltage value of protected equipment, thus protecting communication lines and equipment.
4. The lightning arrester can be used not only to protect the high voltage generated by lightning, but also to protect the operating high voltage.
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