When the electric field intensity in the air reaches a certain level, the air insulation between two lightning clouds with different charges or between the lightning cloud and the ground will be broken down and violently discharged, resulting in dazzling electricity. At the same time, the high temperature generated by the strong discharge current causes the surrounding air or other media to expand violently, causing deafening noises. This is lightning
How to classify the lightning protection level of buildings. With the acceleration of urban development, there are more and more high-rise buildings in the city, and the importance of lightning protection and grounding engineering has become increasingly prominent as houses become taller.
. Everyone wants to live in a safe environment, and lightning protection is actually a very important job in modern life. Building lightning protection is actually graded, and the higher the building lightning protection level, the stricter the lightning protection measures. Electrical design online teaching teacher Di
1. Classification of Lightning
Lightning is divided into the following three types according to its propagation mode:
(1) Direct lightning
Lightning strikes buildings directly, including electrical devices and structures, producing electrical, thermal, and mechanical effects.
(2) Induced lightning
During lightning discharge, static and electromagnetic induction are generated on nearby conductors.
. He may have caused sparks between metal parts Electrostatic induction refers to the induction of a large amount of charge on overhead lines or other conductive protrusions when thunderstorms approach the ground. After lightning discharge, the induced charges on overhead lines or conductive protrusions will be converted into strong high-voltage shock waves Electromagnetic induction is caused by the rapidly changing strong magnetic field generated by the huge lightning current in the surrounding space after a lightning strike. This magnetic field can induce a high voltage on nearby metal conductors(3) Spherical lightning
Spherical lightning, abbreviated as spherical lightning, is a fireball that emits red, orange, white, and other colored light during lightning discharge.
. A spherical mine is a charged gas in a special state. Spherical lightning often rolls along the ground or floats in the air, and can invade the interior through windows, doors, and windows, smoke pipes, etc. When most spherical mines disappear, they are accompanied by explosions, which can cause damage to buildings and equipment, as well as accidents involving human and animal casualtiesFunction of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China