Table of Contents

      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

Abstract

Deals with the classification of high-altitude EMP (HEMP) electromagnetic environments. Its aim is to assist in defining immunity criteria of items, for example, subsystem or equipment which contain electronic or electricl parts to make sure it will work during and after HEMP waveform exposure. Intended for those who write product or other immunity standards, and gives advice for selecting immunity test levels for any device, equipment, component, system or subsystem which has electrical circuits that could be unsettled by electromagnetic signals.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	SC 77C