What are the skills for lightning protection device selection?

Today, with the advancement of information technology, various series of precision equipment have emerged. Although these devices have promoted the development of information technology, they also have drawbacks. Due to the precision of the equipment, high speed, low voltage, and other characteristics, they resist lightning. The capacity is weak. At this time, the electromagnetic induction overvoltage generated by lightning can easily impact it, resulting in equipment system interruptions, data loss, and even accidents, which seriously affect daily production and life.

Therefore, in order to prevent lightning accidents and ensure the safety of equipment, most people choose lightning protectors for daily equipment protection, but many of them are vulnerable to damage, no protection, and no after-sale protection. What skills do you need to choose? Can we avoid these things?

First, recognize the distribution system

First of all, be clear about your own distribution system, which is TT, TN or IT system, because you can figure out the distribution system, you can determine the single-phase, three-phase, wiring, etc., specify the location of the product installation, in order to select the appropriate lightning protection product.

Second, clearly protect the important parameters of the arrester

(1) Nominal voltage Un: The rated voltage of the protected system corresponds. In information technology systems, this parameter indicates the type of protector that should be used. It indicates the effective value of the AC or DC voltage.

(2) Rated voltage Uc: Can be permanently applied to the designated end of the protector without causing changes in the characteristics of the protector and activating the maximum rms voltage of the protective element.

(3) Rated discharge current Isn: The peak value of the maximum inrush current to which the protector is tolerated when a standard lightning wave with a waveform of 8/20 μs is applied to the protector 10 times.

(4) Maximum discharge current Imax: The peak value of the maximum inrush current that the protector can withstand when a standard lightning wave with a waveform of 8/20 μs is applied to the protector once.

(5) Voltage protection level Up: The maximum value of the protector in the following tests: the flashover voltage with a slope of 1KV/μs; the residual voltage of the rated discharge current.

Third, see the lightning protection test report

When selecting lightning protection products, products that have passed the detection by the lightning protection center must be selected to ensure safety performance. In the selection of manufacturers, we must focus on the strength of the manufacturers, as long as possible to choose the manufacturers with many years of experience in lightning protection to ensure the protection of lightning protection products.

Fourth, choose to meet the requirements of the law of lightning protection device

Nowadays, there are many lightning protection manufacturers, but many manufacturers do not have the legal and regulatory conditions for producing lightning protection devices. Moreover, the lightning protection device has not been tested and accepted by the lightning protection center. There is no guarantee on the market for quality and safety performance. Therefore, it is necessary to pay more attention to the selection of lightning protection devices.

The selection of lightning protection devices is a very important link. Only by choosing lightning protection devices can we really ensure the safety of buildings and equipment. Therefore, Xiaobian reminds consumers in this regard that it is necessary to learn more about the performance of lightning arresters and choose high-quality manufacturers to purchase lightning protection products.

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