Lightning protection devices refer tooverhead terminals, down conductors, grounding devices,protection devices against surge(SPD) and other connecting conductors.
Lightning protection classification
1) Category 1: Manufacture and storage of pyrotechnic articles, etc., causing explosions due to sparks, causing d 'huge damage and human losses with 0; Buildings located in areas or 20 locations at risk of explosion.
2) Category 2: National units of key cultural relics; national-level buildings and large-scale buildings; National Special Level and Class A Hazardous Stadiums that manufacture and store explosives and their products; electrical products and sparks. It is unlikely to cause an explosion or cause huge damage and loss of life.they.
3) The third category: In addition to the first and second categories, this is the third category.
Lightning protection construction
1. Voltage Equalization Ring
The voltage equalization ring is a horizontal lightning protection ring around the perimeter of the building designed to prevent lateral lightning. strikes in high-rise buildings bring. In architectural design, when the height exceeds the radius of the rolling ball (30 meters for the first category, 45 meters for the second category and 60 meters for the third category), a pressure equalization ring is installed every 6 meters . In terms of design, the pressure balance ring can be welded into a closed ring using two main bars in the ring beam. This closed ring must be connected to all down conductors.
2. Lightning rods
General rules for ininstallation of lightning rods are: the highest points and prominent points, such as roof ridges, corners of eaves and corners of parapets of flat roofs.
There are many types of wind turbines. From the point of view of structure, they can be divided into those with reducers and without reducers. From the perspective of blade angle, they can be divided into those with fixed pitch. and the types of variable pitch pitching can be divided into hydraulic pitching and electric pitching. There are no less than four or five types in total. Do you want to design one?
If the mechanism is different, the hub size will be very different. There are several lightning protection systems for wind turbines. The weather mount on top of the machine gun is equipped with lightning rods. are connected to the ground grid by wires. There are metal blocks at the ends of the blades, leading to a grille of mysse from inside the blade, a lightning protection carbon brush between the wheel hub and the nacelle, and between the nacelle and the nacelle. turn, which reduces contact resistance and improves conductive efficiency. The tower and the tower connection flange are also connected via a flexible wire. There are also lightning protection modules, surge protectors, etc. in the electrical circuit, which can protect and cause lightning. There are many books on this topic, most of them are published by China Electric Power Publishing House. There is a specialty store in Beijing. If I have the CAD drawings, I won't tell you.
The inspection qualification standards are:
Wind turbine acceptance specifications GB/T 20319-2006
JB/T wind turbine design requirements 10300-2001
p>Safety requirements for wind turbinesGB 18451.1-2001
Wind turbine assembly and installation codeiennes GB/T 19568-2004
Wind turbines Part 1: General technical conditions GB/T 19960.1-2005
Wind turbines Part 2: General test methods GB/T 19960.2-2005< /p>
etc.~~