# Lightning Protection for a Mining Farm in a Metal Container

Mining means crypto-currency production, most often bitcoins. Computers process information, and the owner gets rewarded for this. Such process requires stable operation of the equipment and reliable lightning protection. Such facilities are classified as special types according to the regulatory documents and require installation of standalone lightning arresters. The ZANDZ Technical Center has received a request to calculate the lightning protection for a mining farm in a metal container. Let us continue with more detailed review of our offered solution.

Calculation of lightning protection for a mining farm in a metal container

Facility: a mining farm in a metal container

Figure 1. Facility plan.

Task: To calculate the lightning protection system for the mining farm in a metal container

Solutions to meet the requirements to the lightning protection system of the mining farm in a metal container are:

1. The lightning protection is made in accordance with the Electrical Installations Code (EIC), Rev. 7, SO 153-34.21.122-2003 "Guidelines for the lightning protection of buildings, structures and industrial infrastructure" (hereinafter referred to as SO) and RD 34.21.122-87 "Guidelines for the lightning protection of buildings and structures" (hereinafter referred to as the RD).
2. The facility is classified as a special one according to SO. The system's reliability should be at least 0.999.
3. A 12-m standalone lightning arrester is installed.
4. For the lighting arrester, a grounding arrangement is installed as follows:
• Laying a horizontal ground electrode for current spreading in two directions at 90 degrees between them. The ground electrode is made of a corrosion-resistant steel copper-plated strip with a cross-section of 4 x 30 mm (GL-11075), the laying depth is 0.5 m;
• in each direction at the distance of 5 m from the lightning arrester, one 3-m vertical electrode is installed;
• vertical and horizontal electrodes, as well as horizontal electrodes with the interception rod are connected using clamps ZZ-005-064.

Figure 2 shows hardware layout.
Table 1 includes the list of required hardware and materials.

Условные обозначения: - Legend:
- стержневой молниеприемник h=12 м; - Lightning rod h = 12 m;
- горизонтальный заземлитель; - Horizontal grounding electrode;
- вертикальный заземлитель длиной 3 м; - 3 m vertical grounding electrode;
- зажим для подключения проводника - Conductor connecting clamp
Зона защиты на отм. +2,500 - Protection zone at + 2.500
с надежностью 0,999 СО - with reliability 0.999 according to SO

Figure 2. Layout of equipment for lightning protection of a mining farm in a metal container

Table 1. List of material requirements.

 Item # Part number Product Q-ty 1. ZZ-201-012 ZANDZ 12 m vertical lightning arrester (galvanized steel; with parts embedded under the foundation) 1 2. ZZ-005-064 ZANDZ Conductor connection clamp (up to 40 mm) 4 3. GL-11075-10 GALMAR Copper-clad strip (30x4 mm/S 120 mm²; 10-meter strip bundle) 1 4. ZZ-001-065 ZANDZ Copper-plated threaded grounding rod (D14; 1,5 m) 4 5. ZZ-002-061 ZANDZ Threaded coupling 3 6. ZZ-003-061 ZANDZ Termination 2 7. ZZ-004-060 ZANDZ Guide head for jackhammer attachment 1 8. ZZ-006-000 ZANDZ Conductive grease 1 9. ZZ-007-030 ZANDZ Waterproofing tape 1 10. ZZ-008-000 ZANDZ Attachment to the hammer (SDS max) 1

Do you have any questions about lightning protection of the mining farm or other facilities? Please, contact the ZANDZ Technical Center!

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