Design Calculations of Lightning Protection Systems - Part ... It can be calculated according to following formula; The protection radius of an ESEAT is related to its height (h) relative to the surface to be protected, to its efficiency and to the selected protection level (see Annex A). Design the lightning protection system / Step by step ... The lightning rod requires a connection to earth to give a building protection. Following these guidelines for sizing and placing SPDs throughout an electrical distribution system takes the guess work out of it and maximizes surge suppression at every point. The lightning protection zone (LPZ) as shown in Fig. For non-MATLAB users : Download the standalone executable Lightning Protection Design Calculator (.exe). The zone boundaries of an LPZ are not necessarily physical boundaries (e.g. BIL or Basic Insulation Level Definition Table and Calculation These calculations are according to IEC Standard 62305-2. PDF Lightning Protection Solutions There are four lightning protection levels, I-IV, with I having the highest level of protection. Calculus is a free tool that allows the generation of a downloadable PDF report with the system. 4.2.2.8 The study must culminate in a design report where Strike Distance calculations, 3D model of the substation and a protection coverage plan are provided to ElectraNet for review. Classes of LPS I, II, III and IV are defined as a set of construction rules based on the corresponding lightning protection level (LPL). Energy Handling Capability The MOV blocks tend to leak a minuscule amount of current at operating voltage, generating heat in the process. Lightning Protection Calculators by ArresterWorks Lightning Risk Assessment Guide | ECLE The NFPA recommends a striking distance of 30 m or 46 m. The SCHIRTEC E.S.E. These parameters are shown in Table 6. Protection measures such as the lightning protection system (LPS), shielding wires, magnetic shields, and SPD determine the LPZs. The lightning protection system for the site must comply with IEEE 998. The lightning protection industry began in the United States when Benjamin Franklin postulated that lightning was electricity, and a metal rod could be used to carry the lightning away from a building. IEC 62305 - Protection Against Lightning, is the apex level document that informs the standards for lightning protection around the world. Determine the value of CFO (or BIL). R (h) = 2rh − h2 + Δ(2r + Δ) p for h ≥ 5 m and Rp = h x Rp(5) / 5 for 2 m ≤ h ≤ 5 m where The BS EN/IEC 62305 Standard for lightning protection was originally published in September 2006, to supersede the previous standard, BS 6651:1999. Calculate Number of Down Conductor. All these calculations are based on:. As a result of the analysis, the radius of the lightning rod coverage is 79m in areas with risk level 1, which can increase up to 107m in an area with risk level 3. If it needs LPS than at which level of protection we have to design the system. Several protection levels of SPD allows the energy to be distributed among several SPDs, as shown in Figure J22 in which the three types of SPD are provided for: Type 1: when the building is fitted with a lightning protection system and located at the incoming end of the installation, it absorbs a very large quantity of energy; Both voltage and current threat levels, along with their waveform types, are defined in Section 22, Tables Lightning RisksLightning Risks • Ri k t i b d li ht i t ik d itRisk assessment is based on lightning strike density maps called isokeraunic (or isoceraunic)maps, plus: • The structureThe structure s's 'effective collection areaeffective collection area' for lightning strikes. IEC 62305 also introduces four lightning protection levels (LPL) I-IV. Abstract: Lightning is the main cause of transmission line failure, and it is important to improve the lightning protection level of the transmission line for the stability of the power system. The protection area depends on a number of factors : • h(m) : is the height of the ESEAT tip over the horizontal plane through the furthest point of the object/area to be protected. Lightning rods come in many different forms, including hollow, solid, pointed or rounded. If not then at what level of protection (LEVEL I-IV), the structure will be protected. The maximum values have been used in the design of products such as . Calculate Probable No of Strike on Structure. As per IEC 62305-2, tolerable risks are as follows. Type of Loss Tolerable Risk 1 RT1 Loss of human life 10-5 Risk of 1 in 100,000 LPL I, II or III) a smaller rolling sphere radius would be used. In Article " Design Calculations of Lightning Protection Systems - Part Two ", I indicated the lightning protection design process involves a number of design steps as in below Fig.1. • IEEE 998 lightning strike shielding analysis: This assessment analyzes the lightning protection system to be installed at the site and its capacity to handle lighting strikes along with other important data. Each level has a fixed set of maximum and minimum lightning current parameters. Capture system: Device for picking up lightning. Each set comprises level-dependent (e.g. For higher altitude use correction factor for BIL. Since the middle of the 18th century it began with the work of Benjamin Franklin by protecting structures against Lightning protection rods and wires as lightning arresters. The protection angle is selected based on the acceptable level of exposure. Every class have different value D for calculation position of lightning rod Figure 3 - IEC 62305-3 class of protection level The Protection Level is correlated to the damage probability on the considered structure For two heights, use the higher level heights. This level would provide protection against 99% of return strokes. For two heights, use the higher level heights. LIGHTNING PROTECTION DESIGN •The project objective was to design a direct strike Lightning Protection System (LPS) for the plant. Collection Area (Ac)= (L x W) + 2 (L x H) + 2 (W x H) + (3.14 x H2) Probable No of Strikes to Building / Structure (P)= Ac x Ng x 10 -6 No's / Year. All these calculations are based on: lightning strike density in that particular area ( provided by OMV i.e. As per IEC 62305-2, tolerable risks are as follows. These calclators are for your education on the subject. km / year) Yearly average flash density from map on Tab 2 Yearly average flash density (from map on Tab 2 ) Lightning Risk Assessment from NFPA # 780 - 2008 edition 000000 20.00 20.00 10.00 4.00 0.25 30.00 3.00 0.50 1.00 2.00 0.50 0.50 1.00 . Course Description: This course is intended to prepare the targeted persons with the following: Knowing the steps of Lightning Protection System Design Process, Knowing the definitions of Main Terms in Lightning Protection System Design Process, Knowing IEC 62305-2 method . Don't forget to subscribe to our channel for more electrical engineering online courses Free Courses:1- Basic Concepts of Electric Circuits:https://www.kha. The lightning protection level (LPL) is generally recommended to be LPL1, which is the highest level of protection. interest in lightning. All lightning rods are made of conductive materials, such as copper and aluminum. That software of INGESCO is a tool to perform the calculation of the level of protection against lightning according to the regulations IEC 62.305-2, UNE 26.186: 2011, NFC 17.102: 2011. This is achieved by establishing equipotential bonding or maintaining a separation distance between the components of the lightning protection system and other electrically conductive elements inside the structure. (every other pole will help if insulation levels are kept high at the unprotected poles). Tolerable Risk denoted by RT, is the maximum value of the risk which can be tolerated for the structure to be protected. As an example, it can be shown that a building . Lightning is the main cause of transmission line failure, and it is important to improve the lightning protection level of transmission line for the stability of the power system. Capture the lightning strike protection levels and suppressor placement required for its myriad of power and signal lines. Calculation. When the electric field reach this level representing a minimum risk for a lightning, the OPR begins to get activated and generates high voltage pulses, helping to Abstract Protection of structures against lightning has been an area of study for a very long time. To offer a greater lightning protection level (e.g. A List of the effectiveness of lightning conductor with corresponding protection levels follows below. Sr. Tolerable Risk denoted by RT, is the maximum value of the risk which can be tolerated for the structure to be protected. The zones are areas characterized according to threat of direct or indirect lightning flashes and full or partial electromagnetic field. Outcome of lightning protection calculations: Install a combination of lightning masts and shield wires that provides adequate lightning strike coverage. Lightning-caused transient voltages are defined in the Aircraft Standard RTCA/DO-160E. SPD Class 1; SPD Class 1+2; SPD Class 2; SPD Class 3; SPD for ITC Systems; Gas Discharge Tube; Technical Information. Lightning Protection Levels (LPL) Four protection levels have been determined based on parameters obtained from previously published technical papers. It contains "Simplified Risk Assessment" calculations to determine if an LPS is recommended for a building. Calculate Area of Building / Structure. This calculator is designed in compliance with IS/IEC 62305 and NBC 2016. • lightning impulse protective level of a surge-protective device: The maximum lightning impulse voltage expected at the terminals of a surge-protective device under specified conditions of operation. Lightning Stock Flushing Density Number of Thunderstorm (N)= 80.00 Days/Year Lightning Flash Density (Ng)=69 km2/Year For details on Lightning Protective Level (LPL) and Switching Protective Level parameters, check out this resource. Figure 1: Lightning Protection for the Substation - Rolling Sphere Method 2.0 Shielding Coverage with Fixed Angle Method Fixed angle method is a technique that uses vertical angles to determine the number, position, and height of shielding wires or masts. level of lightning protection level to contain the risk with in tolerable limits. The lightning parameters are peak current, flash charge, specific energy and average steepness. 4.2 Design and Construction . Calculate No of Down Conductor for Lightning Protection Area of Building / Structure: Length of Building (L) = 60 Meter. statistical calculations should, however, be viewed with caution. Calculate whether Lighting Protection Required or Not. • Its use. Fig.1: The Lightning Protection Design Process. Design Calculations of Lightning Protection Systems - Part Twenty. The Lightning Protection Institute is a nationwide not-for-profit organization founded in 1955 to promote lightning protection education, awareness, and safety. The standards define an effective lightning protection system as a set of equipment and devices to capture (never to attract) lightning and conduct it safely to ground. Surge Protection Devices. Lightning protection, grounding, equipotential bonding . Hence, the insulation of such equipment must be designed to withstand a certain minimum voltage before the lightning impulse over voltage gets discharged through surge protecting devices. Why conduct lightning protection calculations? With this software one can ensure whether his structure is protected without lightning protection system. All these calculations are based on lightning strike density in that particular area ( provided by OMV i.e. 4.2.3 Requirements . Lightning Protection Calculators. (Values in red are calculations - DO NOT DISTURB) Comparison Answer = SHOULD BE INSTALLED (flashes / sq. General Industry Information. lightning protection strategy, nVent has incorporated several major concepts into a Six Point Plan of Protection: 1. Lightning equipotential bonding; Classes of LPS. Substations need a shield to protect itself from lightning strikes. Calculate bus Surge Impedance Z s from the geometry. However, the scientific and technical basis for this improved performance is far from certain and the efficacy of these . • Its type of construction. Lightning monitoring system 26 5.1 Smart monitoring 26 5.2 Lightning current detection 27 6. The design requirements, protection level calculations and protection radius are obtained from this standard. Improved lightning protection of overhead distribution lines against faults is . This will automatically install the MATLAB Compiler Runtime (MCR) if it is not installed on your machine. The areas under the protection of lightning rods are identified according to the "lightning risk calculation" carried out for the facility to be protected. It is not intended to replace the detailed risk assessment calculation and, when the necessary information ultimately becomes available, a full risk assessment should be carried out. This standard has a comprehensive risk assessment section that is based on IEC standards, well written rules for the design of lightning protection systems, guidance planning • Lumen method calculations (light flux method) • Determines average illuminancein large open areas • Good for general lighting • Point-by-point computer calculations Arresterworks is not responsible for how the data is applied. It assesses the lightening risks to the facility according to international standards requirements. MCR or MATLAB is required to run the GUI. accepted practices are just as effective as detailed calculations. Typical Calculations • Predict general & ambient light levels • Rough estimation based on a Watts/sq.m method • Not very accurate, but good for prelim. IEEE C62.41.2 defines the types of expected surges within a facility as: Category C: Service Entrance, more severe environment:… These parameters are shown in Table 6. The design requirements, protection level calculations and protection radius are obtained from this standard. Width of Building ( W ) = 28 Meter. For higher altitude use correction factor for BIL. For direct lightning strikes, SPDs alone are not a replacement for comprehensive lightning protection (refer to UL96A Master Lightning Certification). When lightning impulse over voltage appears in the system, it is discharged through surge protecting devices before the equipments of the system gets damaged. 8.11 and Table 8.2 was introduced in the IEC 62305 for lightning protection design. Lightning Induced Transient Susceptibility RTCA/DO-160, Section 22 As discussed above, the direct lightning strike on an aircraft causes indirect voltage transients due to magnetic or electric field coupling. Protection Radius Theory; E.S.E Theory; Surge Protection Theory; Lightning Protection Theory; Animation; Installation Chart; Protection Level Calculator Type of Loss Tolerable Risk 1 RT1 Loss of human life 10-5 Risk of 1 in 100,000 All these calculations are little bit complicated and hence to make it easier for the calculation, JMV has developed a Lightning Risk . Calculate Collection area of Structure. Clause 7 . protection level IEC 62305 have 4 class of lightning protection, which every subject will calculation put on which class. Building Lighting Protection Calculation (Excel) September 20, 2015 17 Comments. •The key design criteria were: -Fully compliant with AS1768:2007 -Confirm the need for direct strike protection; and that the level of protection manages to an acceptable level of risk. Ng = 8 ), Danger for people, Occupation coefficient of structure, Relative location of site, Fire Risk, Associated services, Electrical Lines, Lightning Protection Level, NFPA 780 is the North American standard for lightning protection systems (LPS). The level of LPS dictates the angle of protection depending on the reference height, see figure 9. Course Lightning-2: Lightning Protection System Design and Calculations. Size of Surge Protection Device (SPD) depends upon Location of Panel: Panel location within the electrical system is more important than the panel's size. The function of the internal lightning protection system is to prevent dangerous sparking inside the structure. 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