![]() ![]() ![]() Table 1 gives the list of the required equipment and materials. Probability of breakthroughs into all the system objects - 0.042.įigure 2 shows the arrangement of equipment. The total number of breakthroughs is 0.0013 (once in 769 years) The total number of strikes into the system is 0.032 (once every 31 years) The density of lightning discharges into the ground – 4 strikes / sq. Results of the calculation carried out with the software developed by the JSC "Energy Institute to the name of G.M. The distance from the horizontal electrode to the foundation of the building is not less than 1 m, the depth is 0.5 - 0.7 meters Installation of a grounding device for each mast, consisting of 2 vertical electrodes with a length of 3 m, connected by a horizontal electrode (copper bonded tape of 30x4 mm). The lightning protection of the object is made with the help of 2 vertical detached air-terminal masts 14 m high (ZZ-201-014).Ĥ. System reliability must be not less than 0,9.ģ. The object refers to category 3 of lightning protection. ![]() Lightning protection is carried out in accordance with IS 153-34.21., 122-2003"Instructions for lightning protection of buildings, structures and industrial communications" (hereinafter IS) and 34.21.122-87 "Instructions for lightning protection of buildings and structures" (hereinafter AD).Ģ. Solutions to meet the requirements for a private house lightning protection system:ġ. It consists of a lightning rod which directly takes the lightning discharge upon itself, a down conductor and a ground electrode. A lightning rod is a device rising above the facility that diverts lightning current into the ground without entering the facility. The protection of buildings and structures against lightning discharges is ensured by lightning rods. Task: Perform calculations of the lightning protection system of a private house using detached lightning rods. Let's study it in more detail.Īn example of a single-family house lightning protection We proposed a solution using air-terminals masts located at a distance from the house. Recently, the ZANDZ Technical Center was given the task to calculate lightning protection of a single-family house 11 m high without installing lighting rods on it. If the building is two- or three-storeyed, then in order to guarantee reliable protection, the interception rod must be sufficiently high. In such cases it is possible to protect the house from atmospheric discharges by detached lightning rods. ![]() But sometimes customers do not want to install any additional elements on the building, in order not to change its exterior. Usually single-family houses are protected by lightning rods, located on their roofs. ![]()
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