This section at the ZANDZ website is intended for the specialists engaged in design and estimates of grounding and lightning protection systems for various facilities. The section contains useful information, recommendations, examples of typical designs in PDF and DWG, and total scopes of work to generate estimates.
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1. Examples of designs in DWG and PDF
The transformer substation is one of the most popular facilities causing many questions and clarifications. The grounding design for this facility requires special knowledge and attention to details. See how to create grounding for a transformer substation.
Oil farms as well as any other oil and gas facilities naturally require a special protection against lightnings. Regulatory documents classify them as special facilities hazardous for immediate environment. Therefore, you should be very careful when developing solutions to provide lightning protection for such facilities. See the example of such a solution!
This is an example design for the lightning protection of the facility classified as fire hazardous zone P-IIa. A metal roof structure is used as a natural lightning rod.
Example design for the grounding and lightning protection for a standalone flange-type metal light tower with the height of 16 m and diameter of 300 mm.
This is a unique example of the grounding and lightning protection design using a lightning grid as lightning rod equipment and grounding electrode at the same time.
A design for the lightning protection and grounding for a two-way railroad loading and receiving rack intended to service railroad oil tank cars with double-throw gangways and entrance ladders.
A design for a communication cabinet (telecoms cabinet) grounding circuit for an intermediate station of selective railroad communication system. The grounding is aimed to provide normal functioning of the equipment located in the cabinet. Soil resistivity: 150 Ohm*m. The solution is provided as five vertical electrodes made of copper-plated steel connected with a bar.
Lightning protection and grounding design for a car service station having dimensions 30.4 x 15.3 x 5.8 m and soil resistivity of 500 Ohm*m. The solution is based on 16 m vertical lightning rods and ZANDZ electrolytical grounding sets.
Shopping centers, malls, and large stores are often a headache for designers. A problem they may face is the need to preserve attractive appearance and still provide a reliable protection for these facilities. We offer an example of a successful solution!
Although residential buildings are classified as conventional facilities, the lightnings also strike them and are also dangerous for them. Considering the building binge, the issue of lightning protection of residential buildings has become very popular in designing. We offer an example of design for the lightning protection of a high-rise residential building!
Example design of a complex solution for a chapel including grounding with the resistance of 5.53 Ohm, lightning protection using a natural lightning rod as well as surge protection.
Example of a set of measures to protect against direct lightning strikes and dangerous interference for highly sensitive equipment in data centers!
Example of a set of measures to protect gas vents and breathing tubes against direct lightning strikes and dangerous interference.
Example of a set of measures to protect from direct lightning strikes and dangerous interference for a stadium.
Example design of a chemicals production building having dimensions 2.2x6x6.75 m (LxWxH). According to the explosion danger classification, as per the EIC, the rooms of the protected building are classified as Category B-I.
The lightning protection, protective and process (functional) grounding design for a wire broadcasting center having dimensions 12.5x10x8 m.
Example of calculation, schemes, and drawings of a typical grounding design for a passenger elevator in a business-centre with the estimated resistance of grounding arrangement of 2.25 Ohm. Number of storeys in a building: 10. Building dimensions in plan view: 58x18 m.
Soil resistivity at the site: 150 Ohm/m. The structure comprises a metal frame, concrete, roll roofing in the main building, metal steel coating over the access-way (station). Ventilation and air conditioning equipment are located on the roof.
Main bay: 900 m. Total bridge length: 2,145 m. Soil resistivity at the facility: 30 Ohm/m. Structure: metal frame, flat roof, reinforced concrete support.
Structure: metal frame, roof made of corrugated board, metal frame of roof lanterns. Pavilion length: 100 m. Antennas are located on the roof.
Facility: a sewerage pump station with an on-ground reservoir. Task: to calculate external and internal lightning protection and grounding with resistance not exceeding 10 Ohm, offer a solution to protect building and electrical equipment against surges.
Soil: clay loam. Soil resistivity: 150 Ohm*m. Task: to perform calculation of external and internal lightning protection and grounding with the resistance not exceeding 10 Ohm.
Facility: charcoal producing plant. Building dimensions: 30x40x10 m (LxWxH), area: 1,200 m2. Area of the facility is 2,800 m2. The building is the highest facility within 100 m. An expensive electrical equipment is used for production.
Facility: a facility with an external CCTV system. Soil resistivity: 160 Ohm*m. The rated resistance of the grounding arrangement is 7.14 Ohm, which is less than the required value 10 Ohm.
Area: 500 m2. Total building area: 1,100 m2. Soil resistivity at the facility: 300 Ohm/m. To protect the building and equipment, ZANDZ roof wire lightning protection is used on the roof.
Facility: a gasoline filling station with a conventional design without the maintenance station. The territory comprises a fuel dispenser under a shed, a reservoir farm, and an administration building with a cafe. To protect GFS against DLS, three standalone lightning rods (poles) H = 20 m shall be installed.
Facility: a building of Expocenter trade and exhibition complex. The structure includes a metal frame and a flat roof. To protect the building and the equipment located on the roof, lightning protection with the ZANDZ lightning protection rods is provided.
Facility: rotation camp for 150 employees. A modular building made of 64 typical container units. Dimensions: 40 x 13.7 m. It is required to perform calculation and develop a lightning protection and grounding arrangement design while meeting the requirements of the effective regulatory documents.
Soil resistivity is 100 Ohm/m. In this option, the linear voltage is 380 V; therefore, the resistance of the grounding arrangement should not be more than 4 Ohm. The solution includes a grounding arrangement consisting of three vertical electrodes.
The airplanes are grounded using ground wires with fixed plugs connected to the airplane sockets. This section considers the solution to develop a grounding arrangement for a flying line. The grounding arrangement is performed in accordance with the EIC Rev. 7, the RTOEIC, GOST 12.1.018.
Facility: a post whereon the Internet equipment is located (IoT, LPWAN, 4G). To protect power circuits, a one-pole combined SDP with an inbuilt fuse is installed.
The DGP is located in the Moscow Region. Soil is clay loam, soil resistivity is 100 Ohm*m. According to the EIC, Rev. 7, item 1.7.101, the resistance of the grounding arrangement should not be more than 4 Ohm.
2. Examples of estimates
The economic feasibility of the use of the ZANDZ modular grounding
(based on PTS 10/0.4 kV as an example).
Calculations for design and resistance of grounding arrangements for PTS 10/0.4 kV using three equipment options. In all cases, identical calculation conditions are used, where the total resistance of the grounding arrangement does not exceed 4 Ohm and is located within 3.5 to 4 Ohm.
- No. 1 — Technical calculation of a conventional grounding arrangement made of an angle bar
- No. 2 — Local estimate for the grounding made of an angle bar (.xls file)
- No. 3 — Technical calculation of a rod modular grounding arrangement made of copper steel
- No. 4 — Local estimate for the grounding made of copper-plated grounding electrodes (.xls file)
- No. 5 — Technical calculation of a rod modular grounding arrangement made of stainless steel
- No. 6 — Local estimate for the grounding made of stainless steel (.xls file)
3. Real-life cases of example calculations of grounding and lightning protection systems
Our company receives many requests to calculate grounding and lightning protection for various facilities. The ZANDZ technical specialists are happy to reply to such requests and offer the solutions meeting modern requirements.
See example calculations for real-life facilities on a separate webpage holiday camp, railway station, observation point, diesel generation plant, antenna, school, restaurant on the water, stadium, warehouse, church, residential building, summer cottage, etc.
4. Lightning strike probability calculation service
You can use a unique service for calculation of lightning strike probability to the facility protected with lightning rods, which have been developed by the ZANDZ team together with the Krzhizhanovsky Energy Institute (OAO ENIN).
The service allows verifying the lightning protection system's reliability and performing the most rational and correct design for the lightning protection via provision of:
- less cost of design and installation work, reduction in unnecessary stock and the use of smaller lightning rods which are cheaper for installation;
- less lightning strikes to the system by reducing the secondary negative effects, which is especially important for the facilities with multiple electronic devices (the number of lightning strikes is reduced along with the lightning rod's height decrease).
The service functions to calculate the efficiency of the designed lightning protection as clear parameters:
- the probability of the lightning strike into the system's facility (protection system reliability is 1 minus probability);
- the number of lightning strikes into the system per year;
- the number of lightning strikes that miss the protection per year.
With this detailed information, the designer may compare the customer's requirements and regulatory documents with the obtained reliability and take measures to change the lightning protection design.
To start calculations, follow the link.
5. Help in calculations and design
Do you need help in calculation, design, or estimating for the grounding and lightning protection systems? Send a request for consultation and our technical specialists will reply.