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Precautions for Installing the External Lightning Protection Device

1. Installation of down-conductor and flashover conductor of external lightning protection device

Down-conductor and lightning conductor should be in the correct position, and the laying should be smooth and straight, without sharp bends. The down-conductor and the stabilizer support of the air-termination system should be fixed and reliable, and each fixed support should be able to withstand a vertical tension of 49N. The height of the fixed support should not be less than 150mm, the fixed support should be uniform, and the distance between the down conductor of the lightning protection device and the fixed support of the lightning conductor should meet the construction specifications.

As a lightning protector supplier, TECHWIN will introduce some precautions for the welding and installing the lightning production device.

2. Precautions for welding an external lightning protection device

When welding is used for the connection of the external lightning protection device, exothermic welding (thermal flux welding) should be used. The welded seam should be full without omissions, the bolts should be fixed with anti-loosening parts (washers), and the anti-corrosion of the welded parts should be complete. When general welding methods are used, anti-corrosion treatment should be done at the welding place. The welding of steel and copper materials shall meet the following requirements:

(1) When the conductor is steel, the lap length and welding method during welding should meet the requirements of the construction specification table.

(2) When the conductor is copper and copper or copper and steel, the connection process should be exothermic welding, and the fusion joint should completely enclose the connected conductor in the joint, and ensure that the metal at the connection part is completely melted, and the connection is firm.

3. Precautions for installing external electrical equipment and the lightning protection device

The power cord of electrical equipment cannot be directly connected to the power distribution device without protection. If the power cord of the electrical equipment integrated with the lightning protection device is directly connected to the low-voltage power distribution device without protection, when it is struck by lightning, the high potential caused by the lightning will be transmitted to other low-voltage power distribution devices through the power cord superior.

If the housing of the electrical equipment has been integrated with the lightning protection device on the roof, it cannot be connected to the grounding wire in the house, which is a severe mistake. Because when the roof is struck by lightning, the lightning current will flow from the lightning protection belt-roof electrical equipment housing-house electrical equipment housing, so that the house electrical equipment housing appears high potential, which is extremely dangerous. Therefore, after the housing of the roof electrical equipment has been integrated with the lightning protection device, it is not allowed to connect with the indoor grounding wire.

Lightning protection is a systematic project, which not only includes the internal facilities, external facilities and ancillary facilities of the building, but also related to adjacent facilities. Therefore, from design to construction, every small link must be taken seriously, and at the same time, the types of buildings must be carefully analyzed in combination with local weather data and lightning positioning systems. Take corresponding protective measures to avoid potential safety hazards for lightning protection. Welcome to consult surge protection manufacturers for more details about lightning protection box.

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