IEC 61000-2-11:1999

Foreword
      Introduction
1 Scope
2 Normative References
3 General
4 Definitions
5 Description of Protective Concepts
6 Classification of Environments, Early-Time HEMP
7 Classification of Environments, Intermediate-Time HEMP
8 Classification of Environments, Late-Time HEMP
9 Principles of the selection of Immunity Levels
      9.1 Approach
      9.2 Test Uncertainties
      9.3 Criticality Criteria
      9.4 Conclusion
Table 1 - Minimum required attenuation of peak time domain
          external environments for the six principal
          protection concepts
Table 2 - Classification of radiated early-time HEMP
          environments
Table 3 - Classification of conducted common-mode early-time
          HEMP environments
Table 4 - Classification of radiated intermediate-time HEMP
          environments
Table 5 - Classification of conducted common-mode
          intermediate-time HEMP environments for power or
          communications lines
Table 6 - Classification example of electric field and
          conducted common-mode late-time HEMP environment
          for a grounded power transmission line
Table 7 - Classification example of electric field and
          conducted common-mode late-time HEMP environment
          for a telecommunication line
Bibliography

The purpose of this publication is to help specify the immunity requirements of an item (e.g. equipment or subsystem) containing electrical or electronic parts to ensure that it will operate during and/or after exposure to a high-altitude electromagnetic pulse (HEMP) waveform. It provides basic guidance for the selection of immunity test levels for any component, device, equipment, subsystem or system which contains electrical circuits that may be disturbed by electromagnetic signals.