Overvoltage protection

In this chapter, you will find technical reference about:

• the different types of overvoltage, their characteristics and potential impacts on electrical equipment
• the lightning protection principles, to protect the building structure and the building electrical installation
• how to design the lightning protection
• the characteristics of Surge Protection Devices (SPDs), how to select them, and the important rules to follow when installing them

Chapter J - Contents

• Overvoltage of atmospheric origin
  • Overvoltage definitions
  • Overvoltage characteristics of atmospheric origin
  • Effects on electrical installations
  • Characterization of the lightning wave
• Principle of lightning protection
  • General rules of lightning protection
  • Building protection system
  • Lightning protection - Electrical installation protection system
  • The Surge Protection Device (SPD)
• Design of the electrical installation protection system
  • Design rules of the electrical installation protection system
  • Elements of the protection system
  • Common characteristics of SPDs according to the installation characteristics
  • Selection of a Type 1 SPD
  • Selection of a Type 2 SPD
  • Selection of external Short Circuit Protection Device (SCPD)
  • SPD and protection device coordination table
• Installation of Surge Protection Device
  • Connection of Surge Protection Device
  • Cabling rules of Surge Protection Device
• Surge protection Application examples
  • SPD application example in Supermarket
  • SPD for photovoltaic applications
• Surge protection technical supplements
  • Lightning protection standards
  • The components of a SPD
  • End-of-life indication of a SPD
  • Detailed characteristics of the external SCPD
  • Propagation of a lightning wave
  • Example of lightning current in TT system

External links

• Surge Protection Devices
• Surge Arresters