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• CCITT Rec. K.11 (11/1988) – PRINCIPLES OF PROTECTION AGAINST OVERVOLTAGES AND OVERCURRENTS
• PRINCIPLES OF PROTECTION AGAINST OVERVOLTAGES AND OVERCURRENTS
• Introduction
• 1 General considerations
  • 1.1 Origin of dangerous overvoltages and overcurrents
  • 1.2 Methods of protection
  • 1.3 Types of protective devices
  • 1.4 Residual effects
  • 1.5 Assessment of risk
  • 1.6 Decision on protection
• 2 Protection of lines
  • 2.1 Protective measures external to the conductors themselves
  • 2.2 Special cables
  • 2.3 Use of protective devices
  • 2.4 Installation of protective devices
  • 2.5 Planning of works
  • 2.6 Recommended policy
• 3 Protection of exchange and transmission equipment
  • 3.1 Need for protection external to the equipment
  • 3.2 Need for equipment to have a minimum level of electrical robustness
  • 3.3 Effect of switching conditions
• 4 Protection of subscribers' terminal equipment
  • 4.1 Degree of exposure
  • 4.2 Dielectric strength
  • 4.3 Use of protectors
  • 4.4 Common bonding
  • 4.5 National regulations
  • 4.6 High cost of maintenance of subscribers' installations
• References