Similar to the lightning protection of buildings, the lightning protection of sports lighting systems is also divided into two categories, external lightning protection and internal lightning protection measures, which constitute a complete integrated lightning protection system. It is easy to confuse and the core measure is the setting of SPD, which needs specific analysis during design:
1. The sports lighting fixtures are arranged in the building and within the protection range of the building's air-termination device.
In this case, the common lamps are arranged on the horse track under the canopy, and the air-termination adopts the roof steel structure, and the lamps are completely within the protection range of the air-termination. In this case, you can safely use 8/20 SPD.
2. The sports lighting fixture is outside the building, and the building's air-termination device cannot protect the sports lighting fixture.
It is common for lamps to be installed on light poles, such as the arrangement of light poles on both sides and four corners. In this case, a separate air-termination device is required, and an air-termination rod is usually used. The setting of SPD needs specific analysis:
The lamp pole is equipped with a special transformer, that is, a lamp pole is equipped with a transformer. In this case, the low-voltage power distribution is a first-level power distribution. In this case, the SPD needs to be 10/350.
If the light pole is powered by the low-voltage circuit of a nearby substation, and the power distribution at the light pole is secondary power distribution, the 8/20 SPD should be used at this time.
3. Suggestions for lightning protection level
According to the above, the type of SPD can be known, but the parameters of SPD need to be compatible with the lightning protection level.
GB 50343-2012 sets the lightning protection level of electronic information systems in large stadiums as B, which is neither comprehensive nor reasonable!
According to JGJ 31-2003, the level of sports building is directly linked to the event. Therefore, sports buildings of different levels have different importance, economic value and social benefits of the event. And sports lighting is the highest-load electrical equipment in sports buildings, so the recommended protection levels are as follows:
4. SPD in lighting products
Many lighting products have SPD, which can play a certain protective role. However, considering the versatility of the product, the product needs to be finalized. Therefore, the SPD is set to the load level to directly protect the lamp. However, it should be noted that for many products, the drive power supply and the lamp are installed separately, and there is a certain distance between the two. The SPD is installed in the drive power box. If it is an outdoor venue, the lamp is installed at a high place, such as the installation of a light pole, and the SPD in the drive power supply is difficult. Protect the lamps.
Post time: Aug-02-2021