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Setting of lifting ightning Rod

Time:2021-05-17 View:

Record
According to the records of the Later Han Dynasty, shortly after the lightning attack on the important Palace at that time and bailiangtai on WEIYANGGONG, a fang shi named Yong Zhi suggested to Emperor Wu of Han, install "squid" on the roof of the palace to prevent disaster. In the following two thousand years, most of the roofs of ancient buildings in our country have installed this kind of metallic tile decorations, some are dragons, some are flying fish and male chickens. Although they have different shapes, they all have sharp objects pointing to the sky, although there is no guide line and terrestral connection, the eaves and walls wet by heavy rain naturally play a role in connecting the ground. Because this kind of tile decoration is higher than that of the building, even if it hits the ground violently, it usually only destroys the tile decoration and retains the main body of the building.

Design
Because lightning Rod requires a certain installation height according to the requirements of the protection scope, then there is ightning Rod Tower, that is, Tower ightning Rod (lightning tower). There are the following specifications: GFL angle steel ightning Rod Tower, GJT round steel ightning Rod Tower, GH steel pipe Rod ightning Rod Tower and other forms of metal tower, the right figure shows GFL series angle steel ightning Rod Tower.
The protection scope of Lightning Rod Tower should be calculated according to the grounder method.

Settings
(1) the distance between the independent ightning Rod and the preserver should be no less than 5m to avoid counterattack when lightning strikes ightning rod. Independent ightning Rod should be equipped with independent grounding device, and the distance between the ground and the grounding grid should not be less than 3m.
(2) high voltage distribution installtion frame and roof of 35kV and below should not be installed with ightning rod. The ightning rod installed on the frame shall be connected with the ground grid and the centralized grounding device shall be installed.
(3) ightning Rod should not be installed on the door frame of the transformer.
(4) the distance between ightning Rod and grounding device and road and exit should be more than 3m, otherwise the gravel or asphalt surface should be 5~8cm thick to ensure that people are not harmed by step voltage.
(5) It is forbidden to install overhead illuminating line, telephone lines, radio drama, antennas, etc. on ightning rod or frame.
(6) If a lighting lamp is installed on an independent ightning rod or frame, its power cord must use lead skin cable or penetrate into steel pipe, and be directly buried into the ground with a length of more than 10m.