YD/T 4518.1-2023
Electromagnetic compatibility requirements and test methods for composite equipment with integrated communication functions Part 1: Equipment used in residential, commercial and light industrial environments (English Version)

Standard No.

YD/T 4518.1-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

Latest

YD/T 4518.1-2023

Introduction

Interpretation of the core content of the standard

This document sets detailed electromagnetic compatibility (EMC) requirements for composite devices with integrated communication functions, which are particularly suitable for residential, commercial and light industrial environments. The standard subdivides device ports into seven categories, including AC power ports, DC power ports, and antenna ports, and specifies test methods for each.

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Key Technological Innovations

Technical Elements	Requirements of this Standard	Differences from Traditional Standards
Frequency Band Exemption Mechanism	Allows exclusion of wireless communication operating frequency bands from immunity tests	Traditional standards do not have such an exemption mechanism
Composite Equipment Classification	Clearly distinguishes between integrated equipment and combined equipment	Previous standards did not make a clear distinction
PLC Port Test	1.6MHz/30MHz frequency band requirements	Most standards do not consider PLC special scenarios

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Analysis of Implementation Key Points

Typical Application Scenarios

Take smart washing machine as an example, when the Wi-Fi module is integrated:

1. Non-communication functions need to meet the emission requirements of GB/T 9254.1
2. The Wi-Fi module is evaluated separately according to the communication standards
3. The maximum power consumption mode needs to be activated when testing the whole machine

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Analysis of Standard Evolution

This specification innovatively integrates:

• Composite device architecture of ETSI EN 303 446-1
• Multimedia device requirements of GB/T 9254.1
• Environmental classification method of GB 17799.3

For the first time, a standard applicable to IoT terminals.

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Test Implementation Suggestions

Enterprises should pay special attention to the following when implementing:

Test Type	Key Control Points	Common Problems
Radiated Interference	Need to test transmit/standby mode separately	Ignoring the exemption of working frequency band leads to misjudgment
Conducted Interference	Special application of the 3-meter cable rule	Wrong selection of DC port limit
RF Immunity	Antenna protection measures for exempted frequency bands	Failure to take attenuation leads to module damage

YD/T 4518.1-2023 Referenced Document

• EN 50561-1 Powerline communication apparatus used in low voltage installations - Radio disturbance characteristics - Limits and methods of measurement - Part 1: Apparatus for in-home use
• EN 50561-3 Power line communication apparatus used in low-voltage installations - Radio disturbance characteristics - Limits and methods of measurement - Part 3: Apparatus operating above 30 MHz
• GB 17625.1 Electromagnetic compatibility—Limits—Part 1: Limits for harmonic current emissions (equipment input current ≤ 16A per phase)
• GB 17799.3-2012 Electromagnetic compatibility (EMC).Generic standards.Emission standard for residential,commercial and light-industrial environments
• GB/T 9254.1-2021 Information technology equipment, multimedia equipment and receivers—Electromagnetic compatibility—Part 1: Emission requirements

YD/T 4518.1-2023 history

• 2023 YD/T 4518.1-2023 Electromagnetic compatibility requirements and test methods for composite equipment with integrated communication functions Part 1: Equipment used in residential, commercial and light industrial environments

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