GB/Z 30556.9-2025 Electromagnetic compatibility—Installation and mitigation guidelines—Part 9:System-level susceptibility assessments for HEMP and HPEM

Scope

This document aims to propose a method for assessing the impact of high-altitude electromagnetic pulses (HEMPs) and high-power electromagnetic (HPEM) environments on electronic systems. Here, a system refers to a collection of subsystems, devices, and components combined together to perform a specific function (for a more complete definition, see 3.20). This document will introduce the technologies related to this method, its advantages and disadvantages, and provide examples of applying this technology to assess the sensitivity of electronic systems (such as those in devices). This is closely related to assessing the sensitivity of EMC systems at the system level. This document aims to provide an effective method for assessing system-level sensitivity in HEMP and HPEM environments, and discuss the advantages and disadvantages of these methods and application examples. Typical systems have wired or wireless external connections, and their evaluation is also included in this document. This document provides general guidance and does not address safety issues or conflict with ITUT's rules on the protection of telecommunications equipment [21].

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