Organization of grounding at substations with a high voltage of 110 kV and more is more difficult than at any other facility. Upon the request of EIC 7th ed., Paragraph 1.7.90, uch electrical installations having a source with an efficiently or grounded neutral must be equipped with a grounding device with a resistance of up to 0.5 Ohms.
Read moreRecently, the ZANDZ Technical Center received the task of calculating the lightning protection of a loading and unloading rack, ensuring a system reliability of at least 0.95. Our technical experts offered a solution, which we are sharing with you.
Read moreThe development of oil fields in remote areas is usually accompanied by the construction of buildings in which the personnel will live. The ZANDZ Technical Center received a request for calculation of lightning protection of one of these buildings - a hostel located in the oil and gas condensate field.
Read moreThere are no special requirements for lightning protection of office buildings in the AD. But it’s important for designers to remember that the office is the “visiting card” of any large organization, so lightning protection should not spoil its appearance. This nuance was taken into account by the engineers of the ZANDZ Technical Centerwhen they were given the task to calculate lightning protection for one of the office buildings of the Russian Post company. Our experts located lightning rods inside the perimeter of the roof so that they were not too noticeable from the street and did not change the exterior of the building.
Another feature of this project is the low resistance of the grounding device. The office building is large in perimeter, and since the project involves laying a grounding contour along its entire length, the grounding resistance is less than 1 ohm.
Read moreThe safety of passengers depends on the stable operation of communication equipment used by railway workers. Therefore, grounding of telecommunication cabinets on the railway should be as reliable as possible. A request for the calculation of such grounding for one of the railway stations of the Russian Railways came to the ZANDZ Technical Center. A feature of the object is the cramped conditions for the installation of the grounding device. To install it, it is necessary to bypass high-voltage cables and the foundations of fences. Our technical experts offered a solution, which we are sharing with you.
Read moreWinter holidays are in full swing, and lovers of active winter holidays rush to the ski resorts. The modern ski resort is a complicated complex of structures and infrastructure elements: technical and administrative buildings, hotels, lifts, transformer substation and lighting system. Is it necessary to protect it from lightning, because in winter this natural phenomenon is a rarity? In fact it is, by all means. First of all, because a “rare event” does not mean “impossible”. For example, in this video you can see what a direct lightning strike during a winter thunderstorm leads to.
Read moreUsually single-family houses are protected by lightning rods, located on their roofs. But sometimes customers do not want to install any additional elements on the building , in order not to change its exterior. In such cases it is possible to protect the house from atmospheric discharges by detached lightning rods. If the building is two- or three-storeyed, then in order to guarantee reliable protection, the interception rod must be sufficiently high. 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. We proposed a solution using air-terminals masts located at a distance from the house. Let's study it in more detail.
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