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GB/T 38659.5-2025Electromagnetic compatibility — Risk assessment — Part 5: 150 kHz~30 MHz conducted disturbance (English PDF)

电磁兼容风险评估第5部分：150kHz~30MHz传导骚扰

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 25, 2025

Implementation date

November 1, 2025

Scope

GB/T 38659.5-2025 is the English-translated version of 电磁兼容风险评估第5部分：150kHz~30MHz传导骚扰.

GB/T 38659.5-2025 is the Chinese national standard covering judging a product's conducted emission risk before it is built — the classification of the product and the system, the ports assessed and the division into units, the risk indicator levels for Class A and Class B equipment and for vehicle, ship and engine parts, each tied one for one to a test level, the ideal model, the risk factors, the analysis and the assessment, and the report. The 150 kHz to 30 MHz band is where a switching supply puts its noise back onto the mains, and it is the band a product most often fails on. Part 5 of the series, first edition. In force from 1 November 2025. Issued on 25 April 2025, it has been in force since 1 November 2025.

Document preview — GB/T 38659.5-2025

National Standard of the People's Republic of China

ICS: 33.100
Classification: L 06

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
IntroductionIV
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 General requirements3
4.1 Product and system classification3
4.2 Tool Requirements3
5 Conducted Disturbance Risk Assessment Procedure4
6 Conducted disturbance risk assessment port4
7 Division of conducted disturbance risk assessment units5
8 Conducted disturbance risk assessment risk indicator level5
8.1 Class A equipment5
8.2 Class B equipment6
8.3 Vehicle, ship and internal combustion engine parts/modules7
9 Ideal Model for Conducted Disturbance Risk Assessment8
10 Conducted disturbance risk factors9
11 Conducted disturbance risk analysis9
12 Conducted disturbance risk assessment10
13 Reporting requirements12 Reference13

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is part 5 of GB/T 38659 "Electromagnetic Compatibility Risk Assessment". GB/T 38659 has published the following parts.

— Part 1: Electrical and electronic equipment;

— Part 2: Electrical and electronic systems;

— Part 3: Equipment risk analysis method;

— Part 4: System risk analysis methods;

— Part 5: Conducted disturbances from 150kHz to 30MHz.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the National Technical Committee for Radio Interference Standardization (SAC/TC79).

This document was drafted by: Shanghai Electric Science Research Institute, Dalian Zongyi Technology Co., Ltd., Shanghai Robotics Industry Technology Research Institute Co., Ltd., Shenzhen Anweipu Technology Co., Ltd., Zhejiang Qianjiang Robot Co., Ltd., Nanjing Panda Electronics Co., Ltd., Guangdong Province Zhuhai Quality and Metrology Supervision and Inspection Institute, Zhongrui Technology Co., Ltd., China Automotive Research Institute Automobile Inspection Center (Changzhou) Co., Ltd., Shenzhen Tengyuan Zhituo Electronics Co., Ltd., Shanghai Electrical Equipment Testing Institute Co., Ltd., China Automotive Research Institute New Energy Vehicle Inspection Center (Tianjin) Co., Ltd., Xi'an Qingan Aviation Electronics Co., Ltd., Jiangsu Electronic Information Product Quality Supervision and Inspection Institute, China Automotive Engineering Research Institute Co., Ltd.

Shanghai Medical Device Inspection Institute, Wuhan Branch of China Electric Power Research Institute Co., Ltd., Shenzhen Zhenhua Microelectronics Co., Ltd., Guangdong Gaofeng Technology Co., Ltd., Changzhou Hongguang Energy Technology Co., Ltd., Chaoyue Technology Co., Ltd., Aotu Technology Co., Ltd.

Co., Ltd., Ningde Tebo Motor Co., Ltd., Shanghai Electric Research Institute (Group) Co., Ltd., Shenzhen Helishi Intelligent Equipment Co., Ltd., Shenzhen Lianming Power Supply Co., Ltd., Shaoxing Yiqiang Electric Technology Co., Ltd., Xiamen Coster Electronics Co., Ltd., Huzhou Jiuding Electric Co., Ltd., Shenzhen Longxingchen Power Supply Co., Ltd., Shanghai Wireless Radio Testing Laboratory Co., Ltd., Tianjin Aerospace Ruilai Technology Co., Ltd.

Co., Ltd., Shenzhen Zhiyouting Technology Co., Ltd., Shenzhen Yansheng Xinkong Electronic Technology Co., Ltd., Shenzhen Xinguang Xinzhi Device Co., Ltd., Cixi Yueda Electronic Technology Co., Ltd., Shenzhen Jinyu Technology Co., Ltd., Luoding Baojie Electronics Co., Ltd., Shenzhen Qiaotong IoT Technology Co., Ltd., Shenzhen Tongxin Technology Co., Ltd., Shenzhen Siken 3D Technology Development Co., Ltd., Shenzhen WeiChuang Hi-Tech Electronics Co., Ltd.

Limited Company, Leiden Elevator Co., Ltd., Guigang Jialong Haijie Electronic Technology Co., Ltd., Shenzhen Shenggena Electronics Co., Ltd., Shenzhen Lan Special Circuit Board Co., Ltd., Hangzhou Youlai Technology Co., Ltd., Shenzhen Jiemeikang Electromechanical Co., Ltd., Shenzhen Nengxiao Electrical Technology Co., Ltd.

Co., Ltd., Zhejiang Ruigao New Materials Co., Ltd.

The main drafters of this document are: Zheng Junqi, Wang Pengcheng, Chen Hao, Bie Tijun, Liu Chang, Li Yang, Liang Guansheng, Pan Renxing, Yu Jintao, Liu Daoxuan, Yu Chao, Guo Jiandong, Huo Yanning, Meng Fanjun, Zeng Xia, Lu Weiwei, Yuan Tian, Zhang Tianhui, Huang Feng, Liu Jiangang, Zhang Lei, Xie Meng, Lin Lijin, Tian Tian, Zhou Huaguo, Zhang Zhenwei, Jiang Zongyi, Ming Guangxi, Chen Jinhua, Hao Chengjun, Qian Chong, Yang Manjun, Lu Jiyong, Zhong Huang, Zhu Xuejun, Niu Junying, Ren Yi, Ning Guohu, Zhang Yunchao, He Qinglong, Xue Chunlan, Su Xianhong, Xie Liwei, Liu Haicheng, Yao Qian, Wang Bugao, Zhang Lei, Wei Zeming, Wang Jinjin, and Zhai Zhongjie.

Introduction

Electromagnetic compatibility (EMC) risk assessment technology is based on EMC design methods and uses common risk assessment methods to The risk assessment procedure is to classify risk levels, establish an ideal model for equipment design, and determine risk factors to identify EMC risks.

GB/T 38659 "Electromagnetic Compatibility Risk Assessment" aims to provide physical model-based analysis and suggestions for effective EMC risk response. It consists of five parts.

— Part 1: Electrical and electronic equipment. The purpose is to give the electromagnetic compatibility risk assessment of electrical and electronic equipment.

— Part 2: Electrical and electronic systems. The purpose is to assess the electromagnetic compatibility risk of a given electrical and electronic system.

— Part 3: Equipment risk analysis method. The purpose is to analyze the risk of electrical and electronic equipment.

— Part 4: System risk analysis method. The purpose is to analyze the risk of electronic and electrical systems.

— Part 5: Conducted disturbances from 150kHz to 30MHz. The purpose is to provide a frequency range of 150kHz to 30MHz Risk assessment method for conducted disturbance electromagnetic compatibility (EMC).

Electromagnetic compatibility risk assessment Part 5: Conducted disturbances from 150kHz to 30MHz

1 Scope

This document specifies the general requirements, procedures, ports, unit divisions, risk indicator levels, ideal models, requirements, and factors, risk analysis and risk assessment and reporting requirements.

This document is applicable to the risk assessment of conducted disturbances (frequency range 150kHz~30MHz) of various products, including those used in industry, Equipment in the fields of science, medicine, rail transportation equipment, household appliances and similar appliances, multimedia equipment, vehicles, ships and internal combustion engine parts Pieces, etc.

2 Normative references

GB 4343.1-2024

GB/T 4365-2024

GB 4824

GB/T 9254.1-2021

GB/T 17743-2021

GB 17799.3-2023

GB 17799.4-2022

GB/T 18655

GB/T 38659

GB/T 38659.1-2020

3 Terms and definitions

The terms and definitions defined in GB/T 4365-2024 and GB/T 38659 (all parts) and the following apply to this document.

3.1 Conducted disturbance

Electromagnetic disturbance that transfers energy through one or more conductors.

[Source. GB/T 4365-2024, 3.3.27]

3.2 Risk Index Level riskindexlevel

Determined based on the electromagnetic compatibility requirements of the product application environment.

Note. There is a one-to-one correspondence between risk indicators and test levels.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 4365-2024 · GB/T 9254.1-2021 · GB/T 17743-2021 · GB 17799.4-2022 · GB/T 18655 · GB/T 38659

Editions of GB/T 38659.5

Edition	Title	Revision	Status
GB/T 38659.5-2025	Electromagnetic compatibility - Risk assessment - Part 5: 150 kHz~30 MHz conducted disturbance	current edition	Current

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