95/210789 DC : DRAFT AUG 1995

1 Scope and summary
  1.1 Scope
  1.2 Shields and interfaces
  1.3 Summary
2 Normative references
3 Definitions
4 Mitigation of radiated and conducted disturbances
  4.1 Topological concept
  4.2 Mitigation needs
  4.3 The general concept of enclosure
  4.4 Interactions at the enclosure boundary
5 Shielding
  5.1 General
  5.2 Classification of protection zones
      5.2.1 Zone 1 - Building shield
      5.2.2 Zone 2 - Room shield
      5.2.3 Zone 3 - Equipment shield
      5.2.4 Zone 4 - Apparatus shield
  5.3 Design principles for shielding
      5.3.1 General
      5.3.2 Shielding effectiveness
      5.3.3 Maintaining shielding effectiveness
  5.4 Implementation of shielding
      5.4.1 Sensitive apparatus
      5.4.2 Shielding of racks and chassis
      5.4.3 EMI-tested cabinets
      5.4.4 Shielding of rooms
      5.4.5 Shielding of buildings
      5.4.6 Dealing with apertures
6 Filters
  6.1 General
  6.2 Fundamental filter characteristics
      6.2.1 Attenuation and insertion loss
      6.2.2 Basic types of filters
  6.3 Functional tasks
  6.4 Additional filtering concerns
      6.4.1 Technical aspects
      6.4.2 Economic aspects
  6.5 Selection criteria
      6.5.1 Voltage rating
      6.5.2 Current rating
      6.5.3 Duty-cycle and overload operating conditions
      6.5.4 Operating frequency and range of frequencies
             to be filtered
      6.5.5 Voltage drop and signal loss
      6.5.6 Ambient temperature range
      6.5.7 Insertion loss and attenuation
      6.5.8 Withstand voltage
      6.5.9 Attenuation of HF transient disturbances
      6.5.10 Leakage current to protective earth
      6.5.11 Permissible reactive current
  6.6 Filter installation
      6.6.1 Installation and mounting techniques
      6.6.2 Wiring
      6.6.3 Installation of cabinet filters
  6.7 Filter testing
      6.7.1 General considerations
      6.7.2 Insulation to earth and withstand voltage of
             installed filters
      6.7.3 Insertion loss
      6.7.4 Attenuation of HF transient disturbances
7 Decoupling devices
  7.1 Isolation transformers
  7.2 Motor-generator sets
  7.3 Engine-generators
  7.4 Uninterruptible power supplies (UPS)
  7.5 Optical links
8 Surge-protective devices
  8.1 General
  8.2 Direct equipment protection
  8.3 Installation of multiple SPDs
  8.4 Side-effects of uncoordinated cascades
      8.5.1 Voltage limiting type SPDs
      8.5.2 Voltage switching type SPDs
Informative Annex - Bibliography