# Webinar "Calculation of Lightning Protection Reliability for Any Facility for 30 Minutes using the ZANDZ Calculation Service". Page 2

## Webinar text. Page 2

"News" section

 Раздел «НОВОСТИ» “NEWS” section Обучающие ролики: Video tutorials: Заземление и защита на ZANDZ.COM Earthing and protection at ZANDZ.COM

– The "News" section is the first and the main page you can see. The main essential information is published here: tutorials on how to use the service in details, registration rules, navigation, update news. It is the relevant information related to the calculation service.

"Drawing editor" section

 Редактор чертежей Drawing editor ввод координат защищаемых объектов entering coordinates of the protected facilities ввод координат молниеотводов entering coordinates of the lightning arresters Ссылка: Link:

"Calculations list" section

 Список расчетов Calculations list Параметры: Parameters: 1. Среднее время между ударами молнии в систему. 1. Average time between lightning strikes into the system. 2. Среднее время между прорывами, минуя защиту. 2. Average time between breakthroughs that missed the system. 3. Надежность системы молниезащиты. 3. Reliability of the lightning protection system. Ссылка: Link:

– After you have pressed "Calculation", we go to the "Calculations list" section. Its status is shown. In this case, its status is shown as a drawing and is queued up for calculation. It means that the calculation is being performed. Depending on the object complexity, the calculation takes not more than 2 minutes. We are going to update the page now. We have updated it and we can see in the calculation status that it is complete. What do we look at? We have got a sending date, a calculation date, a serial number there. As a registered user, you will have your own statistics. We can also see the calculation results. Let's see what we get. The most essential parameters are shown first. I have highlighted those three parameters. They are calculated on the basis of the parameters shown below, i.e. we have got the full number of strikes into the system per year, the total amount of the lightning breakthroughs that missed the lightning protection system per year, and the probability of the lightning strike into the system objects. What do these parameters mean? These are the values: "Full number of strikes" and "Total amount of breakthroughs", both are shown on a yearly basis. To switch it over from frequency to time, which are reversely related values, we recalculate it using the method and obtain the following result: the average time between the lightning strikes into the system is 67, i.e. once in 67 years. The second parameter is the average time between the lightning breakthroughs that miss the lightning protection system, i.e. in this case, it is once in 7,143 years. It means that this parameter, "Average time between the breakthroughs that miss the lightning protection system" is very important in terms of evaluation of the need to provide the lightning protection system. By the way, if we can, using the software, calculate and see the probability of the lightning strike, then it will be the average value between the lightning strikes into the system, and see how often the lightning strike into the object will occur. Based on these two important parameters, we look at the following: first, how often the lightning breaks through, and, thus, we can evaluate if we have to make the lightning protection under specific conditions. The second point: when we have got the lightning protection system, we can consider its efficiency. We understand that if the lightning strikes once in 7,143 years, which is the time between the lightning breakthroughs, we can see that the system is sufficiently reliable. And now, we have got such parameter as "Probability of breakthrough into the system object". So, 1 minus this value is used to obtain the reliability of the lightning protection system. We can see that, in this case, using two lightning arresters of 2 meters high we have got the reliability of 0.99, which is a very good value, and it means that the lightning protection is very good. On the right, we have got one more row "Create a drawing from this calculation" and "Full report on calculation". When we press "Create a drawing from this calculation", we will get back to the drawing editor, and this particular drawing will open. I have got many of them, and we can open any of the previously calculated drawings and change the decision.

Full report on calculation

 Полный отчет о расчете Full report on calculation Отчет включает: The report includes: 1. Состав системы. 1. System’s elements. 2. Параметры и координаты элементов системы. 2. Parameters and coordinates of the system elements. 3. Результаты расчетов. 3. Calculation results. 4. Информация об использовании ПО (включая ссылки на действующие НТД) 4. Information on using software (including links to the effective regulatory documents). Преимущества отчета: The report benefits: - удобный формат pdf - convenient pdf format - можно скачать в 2 клика мышью - can be downloaded in 2 mouse clicks - сохранен в истории - saved in the history

– The report will be generated as follows. The calculation date is shown: day, month, year; the components of the system are shown. In this case, we can see that we used 5 wires. We used them to define the plane of our V-shaped roof. Further, the objects having a rectangular cross-section. We had one object, we used a 3D box to define the wall of a house. Other objects were not involved in calculations; therefore, they are shown as zero. Then, the parameters of the system’s elements are shown, i.e. the coordinates we have entered before. They are recorded in this report. So, if you generate several reports and you need to create some statistics on what values we had in different systems... to record this... it is shown in the report, i.e. parameters with all coordinates and functions. "Function code" has a value of 0 or 1. Zero function means that it is a lightning arrester, while 1 means a facility to be protected. Here, all coordinates are shown. We will not look into them. The calculation results are shown that we have already seen. And then, the information is used with the references given to the regulatory documents governing the use of this software. It is document SO-153-34.21.122-2003, item 3.3.1, wherein the information is contained that we discussed before to calculate the complex systems, although we have considered the simple exemplary system. However, if you make calculations for a complex system, you can do that using the software by either a conventional method, as it is allowed in the regulatory document, i.e. the calculation for the protection zones. Item 3.3.1 specifies that, in order to make calculations for the system, it is recommended to use the computer software. Today, it is the only service that enables it. Moreover, we also have got Technical Bulletin No. 25/2009 of the "ROSELECTROMONTAZH" association, "ON THE USE OF THE SPECIALIZED SOFTWARE FOR CALCULATIONS OF EFFICIENCY OF THE PROTECTIVE EFFECT OF THE LIGHTNING ARRESTERS", which states that such efficiency calculation software for rod and wire lightning arresters using the statistical method developed by the Krzhizhanovsky Institute under the guidance of Eduard Meerovich Bazelyan, is also described in this Technical Bulletin and approved for use. The report looks like this. If we turn back, we will get back to the service.

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