{"id":56330,"date":"2020-12-27T14:28:18","date_gmt":"2020-12-27T11:28:18","guid":{"rendered":"https:\/\/yilkomer.com\/yuvarlanan-kure-metodu\/"},"modified":"2026-08-31T02:15:28","modified_gmt":"2026-08-30T23:15:28","slug":"rolling-sphere-method","status":"publish","type":"post","link":"https:\/\/yilkomer.com\/en\/rolling-sphere-method\/","title":{"rendered":"Rolling Sphere Method"},"content":{"rendered":"
The rolling sphere method stands out as the method we use most frequently at Y\u0131lkomer in lightning protection designs. So, what is this rolling sphere method? In this article, I wanted to briefly explain the rolling sphere method to you.<\/p>\n

In very simple terms, lightning is a sphere, and the method by which you try to keep this sphere away from the building and facility using air terminals is called the \u201cRolling Sphere Method.\u201d At the point where the sphere touches the structure to be protected, lightning wins. Your design must be so flawless that the sphere must not touch the ground or the structure. Lightning risk, the dimensions of the structure, the facility, and the heights of the air terminals affect the size of this sphere. The key point here is to correctly determine the radius R of the sphere based on an accurate risk assessment and to start our design and calculations correctly from the very first step.<\/p>\n

According to the IEC 62305 Standard, the rolling sphere method is one of the design approaches carried out with passive air terminals. Active lightning rods are not included in these definitions. Rolling sphere method designs carried out with passive insulated air terminals stand out as the most reliable lightning protection system designs. The rolling sphere method does not attract lightning; it comes into play when lightning is about to strike and enables us to protect all sharp and corner points. Designs generally made with tripods and high air terminals stand out as more ergonomic and highly secure solutions.<\/p>\n

\"y\u0131lkomer<\/p>\n

With the rolling sphere method, all facilities such as industrial plants, energy facilities, mosques, and prefabricated structures can be protected.<\/p>\n

\"risk<\/p>\n

Within the scope of the standard, the risk of the facility to be protected must first be determined according to the risk analysis, and the radius R must be selected.<\/p>\n

\"Yar\u0131\u00e7ap\u0131<\/p>\n

Here, the rolling sphere radius can be taken as 20 meters for Risk 1, 30 meters for Risk 2, 45 meters for Risk 3, and 60 meters for Risk 4.<\/p>\n