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

Foreword

This document is a standard or guiding technical document.

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document is Part 9 of GB/T (Z)30556, "Electromagnetic Compatibility Installation and Mitigation Guidelines". GB/T (Z)30556 has been published. The following parts were included.

---General requirements (GB /Z 30556.1);

---Grounding and wiring (GB /Z 30556.2);

---Protection concept against high-altitude nuclear electromagnetic pulse (HEMP) (GB /Z 30556.3);

---Part 5: HEMP Conducted Interference Protection Device Specification (GB/T 30556.5);

---Electromagnetic interference protection rating of the enclosure (EM code) (GB/T 30556.7);

---Part 8: HEMP Protection Methods for Distributed Infrastructure (GB /Z 30556.8);

---Part 9: System-level sensitivity assessment of HEMP and HPEM (GB /Z 30556.9).

This document is equivalent to IEC /T S61000-5-9.2009 "Electromagnetic compatibility (EMC) - Part 5-9.Installation and mitigation guidelines". System-level sensitivity assessment of HEMP and HPEM.

The following minimal editorial changes have been made to this document.

---To align with my country's standards system, the standard name has been changed to "Electromagnetic Compatibility Installation and Mitigation Guidelines Part 9: HEMP". "System-level Sensitivity Assessment of HPEM" ---Corrected the error in the original formula (G.1), changing "Tx" to "Tsc";

---Corrected the error in the original formula (G.3), changing "Icable(f)=Tec(f)=Einc2(f)(A/Hz)" to "Icable(f)= ---Corrected the incorrect formula numbering in Section G.4 of the original text, changing "Formula (1)" to "Formula (G.1)";

---The ambiguous title in Figure I.3 of the original text has been corrected; "convolution process" has been changed to "the transfer function and loop used in the convolution process". "The spectrum of the environment".

Introduction

Electromagnetic compatibility (EMC) refers to the ability of electrical and electronic equipment or systems to function properly in their electromagnetic environment without posing a threat to anything in that environment.

The ability to withstand electromagnetic interference. Electromagnetic compatibility (EMC) issues are a significant factor affecting the environment and product quality, and standardization efforts have been undertaken.

This has attracted widespread attention both domestically and internationally. In this regard, the IEC 61000 series of standards developed by the International Electrotechnical Commission (IEC) are crucial for the manufacturing and information industries.

General standards in fields such as industry, electrical engineering and energy, transportation, social services and health, and consumer product quality and safety are divided into comprehensive standards.

The standards are categorized into six main types. description, environment, limits, testing and measurement techniques, installation and mitigation guidelines, and general standards. my country has already begun developing standards for this series.

Domestic transformation work has been carried out, and a corresponding national standard system has been established.

Within this standard system, GB/T (Z)30556 "Electromagnetic Compatibility Installation and Mitigation Guidelines" pertains to installation and mitigation procedures in the field of electromagnetic compatibility.

The basic standards for measures aim to describe electromagnetic environment protection methods, devices, and mitigation methods, and are planned to consist of 10 parts.

---Part 1: General Requirements. The purpose is to provide general requirements and guidelines for mitigation methods to ensure effectiveness in residential, commercial, and industrial settings.

Electromagnetic compatibility of electrical and electronic equipment or systems used in the environment.

---Part 2: Grounding and Wiring. The purpose is to provide guidelines for grounding and wiring in electrical and electronic equipment and installations to ensure electrical safety. Electromagnetic compatibility of gases and electronic equipment or systems.

---Part 3: Protection Concepts Against High-Altitude Nuclear Electromagnetic Pulse (HEMP). The purpose is to provide information on HEMP protection for civilian facilities.

The analysis includes aspects such as protective design, assessment of existing protection against the strength of the HEMP, and differences between HEMP protection and lightning protection requirements. Basic information about the surface.

---Part 4: HEMP Immunity Technical Specifications for HEMP Disturbance Protection Devices. The purpose is to protect civilian systems by specifying regulations.

To unify the protective devices used to protect against HEMP, and to standardize the technical specifications that have been or will be released by all parties.

---Part 5: HEMP Conducted Interference Protection Device Specification. The purpose is to describe HEMP conducted interference protection devices.

The corresponding parameter specifications are guaranteed by the manufacturers of protection devices, electronic equipment manufacturers, official agencies, and other end users. Consistency between existing or drafted standards issued by the user.

---Part 6: Mitigation of External Electromagnetic Influences. The aim is to describe mitigation measures for external electromagnetic influences such as lightning, radio frequency transmitters, etc.

Guidelines for electromagnetic influences such as power transmission lines and telecommunications transients to ensure electromagnetic compatibility between electrical and electronic instruments or systems.

---Part 7: Electromagnetic Interference Protection Rating (EM Code) of Enclosure. The purpose is to provide a repeatable test method for evaluating the mechanical... The shielding performance of empty structural enclosures such as boxes and racks is specified and coded, allowing manufacturers to determine the electromagnetic field attenuation capability based on known specifications. Choose the casing.

---Part 8: HEMP Protection Methods for Distributed Infrastructure. The purpose is to provide methods for protecting distributed infrastructure (electricity, power, etc.).

Provides guidance on protecting communications, transportation, pipeline networks, etc. from HEMP threats.

---Part 9: System-level sensitivity assessment of HEMP and HPEM. The aim is to provide a system-level sensitivity assessment of HEMP and HPEM.

This paper proposes effective methods for assessing the system-level sensitivity of electronic systems to environmental conditions, and discusses the advantages, disadvantages, and application examples of these methods.

---Part 10: Protection Guidelines for HEMP and IEMI Facilities. The purpose is to provide guidance on protecting commercial facilities from HEMP and IEMI. MI provides guidance.

The formulation of GB /Z 30556.9 this time focuses on the impact of high-altitude electromagnetic pulse (HEMP) and high-power electromagnetic (HPEM) environments on electricity.

The system-level sensitivity assessment method for the impact of subsystems is defined, the system-level sensitivity assessment process is clarified, and the specific methods for each assessment stage are specified.

These requirements enhance the systematic and holistic nature of sensitivity assessment for electronic systems, providing a framework for technical committees, product committees, and conformity assessment bodies.

Providing guidance for sensitivity assessments enables domestic technical committees related to electromagnetic compatibility to address high-altitude electromagnetic pulses (HEMPs) and high-power electromagnetic interference (HMPs).

The handling of system-level sensitivity in electromagnetic (HPEM) environments is consistent. Electromagnetic Compatibility Installation and Mitigation Guidelines Part 9. System-level sensitivity assessment of HEMP and HPEM

1 Scope

This document aims to propose a method for evaluating the effects of high-altitude electromagnetic pulse (HEMP) and high-power electromagnetic (HPEM) environments on electronic systems.

The impact. Here, a system refers to a collection of subsystems, devices, and components grouped together to perform a specific function (see [link to definition] for a more complete definition).

3.20). This document will introduce the techniques related to this method, their advantages and disadvantages, and provide examples of applying this technique to evaluate electronic systems (such as devices).

An example of sensitivity. This is closely related to assessing sensitivity at the EMC system level.

This document aims to provide effective methods for evaluating system-level sensitivities in HEMP and HPEM environments, and discusses these methods. Advantages, disadvantages, 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 security issues or conflict with ITU-T rules on the protection of telecommunications equipment [21].

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document.

Note: GB/T 4365-2024 Electromagnetic compatibility (IEC 60050-161:2021, MOD)

IEC 61000-1-5 Electromagnetic compatibility (EMC) - Part 1-5.General - Impact of high-power electromagnetic (HPEM) environments on civil systems

3 Terms and Definitions

The terms and definitions defined in IEC 60050-161 and the following terms and definitions apply to this document.