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Lightning protection of structures and electrical systems inside of buildings

Lightning protection of structures and electrical systems inside of buildings

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Lightning Interaction with Power Systems - Volume 2: Applications — Recommend this title to your library

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The lightning protection of common buildings (common structures), including their installations and content as well as persons. The European Union (EU) accepted the IEC standard series and transferred it into the European EN 62305 standard series. The standard series is mandatory for all members of the EU. The lightning current is the primary source of damages and malfunctions. An indirect lightning strike (nearby lightning strike) to a building can cause failure or malfunction of the internal systems due to the coupling of the radiated electric and magnetic field.

Chapter Contents:

  • 6.1 Lightning currents
  • 6.1.1 Current components
  • 6.1.1.1 Impulsive currents
  • 6.1.1.2 Long-duration current
  • 6.1.2 Lightning protection level
  • 6.1.3 Simulation of the lightning currents for analytical purpose
  • 6.2 Lightning protection of buildings
  • 6.2.1 Lightning protection zone
  • 6.2.2 Lightning protection system
  • 6.2.2.1 External and internal LPS
  • 6.2.2.2 Classes of LPS
  • 6.2.3 Surge protection measure (SPM) system
  • 6.3 Volume protected against direct lightning strike
  • 6.3.1 Striking distance
  • 6.3.2 Rolling sphere method
  • 6.3.3 Simplifications of the rolling sphere method
  • 6.3.3.1 Protection angle method
  • 6.3.3.2 Mesh method
  • 6.4 Air-termination and down-conductor system
  • 6.4.1 Air-termination system
  • 6.4.1.1 Positioning of the air-termination system
  • 6.4.1.2 Natural components for the air-termination system
  • 6.4.2 Down-conductor system
  • 6.4.3 Materials and dimensions
  • 6.5 Earth-termination system
  • 6.5.1 Earth-termination system for the lightning protection system (LPS)
  • 6.5.2 Improved earth-termination system for the surge protection measure (SPM) system
  • 6.6 Lightning equipotential bonding
  • 6.6.1 Lightning equipotential bonding required for LPS
  • 6.6.2 Lightning equipotential bonding according to the surge protection measure (SPM) system
  • 6.6.2.1 Bonding network
  • 6.6.2.2 Configuration of the bonding conductors
  • 6.7 Separation distance
  • 6.7.1 Material coefficient km
  • 6.7.2 Current steepness coefficient ki
  • 6.7.3 Configuration coefficient kc
  • 6.7.3.1 Simplified approach for the configuration coefficient kc
  • 6.7.3.2 Detailed approach for the configuration coefficient kc
  • 6.8 Currents and voltages on lines
  • 6.8.1 Protection of connection lines at the entrance into LPZ
  • 6.8.2 Shielded connection lines
  • 6.8.3 Lines in reinforced concrete cable duct
  • 6.8.4 Current share on lines in case of direct lightning
  • 6.8.5 Reduction of the induced over-voltage on internal lines by line routing
  • 6.9 Grid-like spatial shield
  • 6.9.1 Magnetic field inside LPZ 1 in the case of a direct lightning strike
  • 6.9.2 Magnetic field inside LPZ 1 in the case of a nearby lightning strike
  • 6.9.3 Magnetic field inside LPZ 2 and higher
  • References

Inspec keywords: building management systems; failure analysis; magnetic fields; lightning protection; electric fields

Other keywords: European Union; electrical systems; European EN 62305 standard series; electric field; IEC standard series; magnetic field; internal systems failure; indirect lightning strike; lightning current; buildings lightning protection

Subjects: Reliability; Power system protection; Buildings (energy utilisation)

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