Is An Isolated Lightning Protection Feasible Today?

прошел 30.06.21

Is An Isolated Lightning Protection Feasible Today?

Целесообразна ли сегодня изолированная молниезащита? - Is An Isolated Lightning Protection Feasible Today?

Вебинар профессора Э.М. Базеляна «Целесообразна ли сегодня изолированная молниезащита?»

Лектор: Э. М. Базелян, д.т.н., профессор; Энергетический институт им/ Г.М. Кржижановского, г. Москва

Isolated lightning protection is not something new. In the Russian regulatory documents, including Instructions RD 34.32.122-87, a concept of standalone lightning arresters has already existed. They were not installed on a protected facility but were spaced apart from it for a particular distance in the ground and air. Actually, these were isolated lightning arresters. Their task is to avoid lightning current distribution along metal structures of the protected facility and thus prevent damage to internal equipment and people's injuries.

Both tasks have remained significant even today due to rapid development of Smart technical systems. However, in technological respect, the complexity of creating an isolated lightning protection has increased manifold. First, due to the structure's height growth; second, due to a very rapid decrease in electrical strength of microelectronic modules and increase in their damage severity.

Lightning arresters are usually located on the ground rather than on the roofs of high-rise structures, but the current from them is transported along current collectors having a high-voltage insulation in relation to metal structures, which in no case should take any significant current load. But grounding devices of the isolated lightning protection system are no less significant challenge. It is common when they almost nullify the proposed protective effect of isolated lightning arresters.

Today, the use of isolated lightning arresters has not been elaborated methodologically in full, although a series of technological solutions has been proven well in practice and can be recommended. To avoid mistakes and unnecessary expenses for the consumer, we have to credibly evaluate surge levels, which affect isolating structures of lightning arresters, and discard any fantastic proposals requiring lengthy current collectors with insulations unavailable yet for today's technologies.

These and other implicit aspects of insulated lightning protection will be discussed during the webinar. Register to learn more.

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