3 types of lightning protection

3 types of common lightning arresters

1, according to the working principle:

(1) Switching type lightning protection device: its working principle is to exhibit high impedance when there is no instantaneous overvoltage, but once it responds to lightning transient overvoltage, its impedance will suddenly change to a low value, allowing lightning current to pass. When used as such a device, the device has: a discharge gap, a gas discharge tube, a thyristor, and the like.

(2) Voltage-limiting type lightning arrester: Its working principle is high-impedance when there is no instantaneous over-voltage, but its impedance will decrease continuously with the increase of surge current and voltage, and its current-voltage characteristics are strongly nonlinear. Devices used as such devices are: zinc oxide, varistors, suppression diodes, avalanche diodes, and the like. Most of the current lightning arresters are of the limited pressure type, and the products of Shenlong are also.

(3) Shunt or turbulence type lightning arrester

Shunt type: In parallel with the protected device, it exhibits a low impedance to the lightning pulse and a high impedance to the normal operating frequency.

Turbulent type: In series with the protected device, it exhibits a high impedance to the lightning pulse and a low impedance to the normal operating frequency.

Devices used as such devices are: choke coils, high pass filters, low pass filters, quarter wave shorts, and the like.

2, by purpose:

(1) Power supply lightning protection device: AC power supply lightning protection device, DC power supply lightning protection device, switching power supply lightning protection device, etc.

(2) Signal lightning protection device: low frequency signal lightning protection device, high frequency signal lightning protection device, antenna feeder lightning protection device, etc.

(3) Combination lightning protection device: also called three-in-one lightning protection device, refers to the lightning protection device that integrates video lightning protection and power lightning protection at the camera end in the monitoring system.

3. According to the lightning protection rating:

A: The general standard is generally above 30KA.

B: The general standard is generally nominal between 1520KA.

C: The general standard is generally between 510KA