Because lightning protection device is mainly composed of lightning receptor (collectively referred to as lightning rod and lightning belt), down conductor and grounding electrode, especially the grounding electrode is buried underground, the down conductor is often hit by wind and rain, and it is easy to break and weld due to years of corrosion. In such a place, the lightning energy received by the lightning arrester cannot enter the earth through the grounding electrode and is consumed, which is more likely to cause damage to buildings and people.
Therefore, it is necessary to test lightning protection devices regularly.
Question 2: Why do dangerous chemicals production enterprises do lightning protection detection every year? Because once a fire or explosion happens in a dangerous chemical production enterprise, the consequences are extremely serious. According to the relevant standards, it seems to be the Code for Lightning Protection Design of Buildings. I forgot, lightning protection is divided into 1, 2, 3 categories, and 1, 2 enterprises check it once every six months.
Question 3: Is lightning detection necessary? After the lightning protection device is put into use, a regular inspection system shall be implemented. Lightning protection devices are tested once a year, and lightning protection devices in explosion and fire danger places are tested once every six months.
Question 4: What is the main detection of lightning protection? I'm Xiao Ren of Reebs. Let me answer your question:
1. Check the effectiveness of lightning protection device and the connectivity of lightning receptor, down lead and grounding device.
2. The effective grounding resistance of grounding system shall be ≤10Ω.
3. Whether the grounding insulation impedance of the power supply lightning protection system is within the allowable value, whether the grounding system is reliable and whether the instantaneous clamping pressure value has changed.
4, information system signal lightning protection system, whether the connected resistance belongs to the allowable value of parameters, whether the instantaneous clamping voltage value changes, the normal value of insulation resistance to ground, etc.
General lightning protection detection basically has these aspects, but also according to the local requirements of the territory, after all, the requirements will be higher in high thunderstorm areas.
Question 5: Generally speaking, what information is needed for lightning protection detection? Hello, everyone, I'm Xiao Ren from Beijing Reebs. Let me answer your question:
The required information is as follows: 1, general construction plan.
2. General description of electricity
3. Electrical master plan and sub-plan
4, concealed engineering drawing
5, lightning protection device construction drawing design specification, construction drawing design drawings and related information.
6. Information about lightning protection products used in the design.
Question 6: What is lightning protection detection? It's a ground wire. Check the grounding electrode.
Question 7: How to do a good job in lightning protection detection is to plan ahead and take precautions in advance. It is necessary to strengthen the professional management and technical supervision of lightning protection and overvoltage in various power grids, transmission and distribution and special transformers (substations) in the power supply area, increase the maintenance and technical transformation of lightning protection facilities for transmission and distribution equipment, and take measures such as standardized management of transmission and distribution lines to effectively prevent the harm caused by overvoltage to power grid equipment.
Secondly, it is necessary to comprehensively check the lines. Combined with the local climate characteristics, conduct a comprehensive inspection of lightning protection facilities of transmission lines, focusing on strengthening grounding device inspection, grounding resistance measurement and lightning protection grounding excavation, and timely deal with grounding devices and grounding resistances that do not meet the specified requirements. If the creepage distance of insulators can not meet the requirements, it shall be incorporated into technical transformation and rectified in time. Do a good job in measuring the grounding resistance in the distribution station area. For the unqualified grounding resistance, it is necessary to formulate an elimination plan to eliminate the defects in time.
Finally, the installation of low-voltage arrester should be done well. Low-voltage lightning arrester must be installed at the head end of each outlet in the distribution station area (below RT insurance) to ensure that all distribution equipment in the distribution cabinet can be protected. For the distribution station areas with qualified grounding resistance or qualified arc suppression, the installation scheme of low-voltage lightning arrester should be formulated as soon as possible and organized.
In addition, it is necessary to strengthen the detection of grounding resistance and lightning protection devices of distribution transformers, eliminate all the damaged lightning arresters, porcelain insulators and various hidden dangers found before the thunderstorm season, and effectively improve the lightning protection ability of the power grid.
Question 8: Didn't the meteorological department do lightning protection detection? The state stipulates that lightning protection detection is generally carried out by the local meteorological department, which will issue a lightning protection certificate, and you can ask them if you have any questions in the future.
However, as long as the general three types of lightning protection and anti-static systems are made by professional lightning protection companies, Party A and the engineering party will have no problem in self-inspection, just sign a warranty.
It depends on your project. It is best to consult local professional lightning protection companies and listen to their opinions.
However, the country is still concerned about lightning protection, and the meteorological department of a slightly larger project will be involved.
Question 9: What should I do if the lightning protection test is unqualified? What should I do if the lightning protection test fails?
1, find out the reasons for the unqualified acceptance of lightning protection detection? Take corresponding solutions according to specific reasons.
2, lightning rod, lightning protection network is unqualified, should be heightened and lengthened.
3, grounding resistance is not up to standard, increase the grounding electrode.
In short, the problem of which link is out of order will be solved.