What is IEC 61000-4-9:2019

Introduction

IEC 61000-4-9:2019 is an international standard that focuses on electromagnetic compatibility (EMC). It provides a framework for measuring and assessing the immunity of electrical and electronic equipment to conducted, common-mode disturbances in the frequency range of 0 Hz to 150 kHz. This technical article aims to present an easy-to-understand explanation of IEC 61000-4-9:2019.

The Importance of EMC

Electromagnetic compatibility is crucial in ensuring the proper functioning and coexistence of electrical and electronic devices in various environments. With the increasing use of electronic equipment in sectors like healthcare, automotive, aerospace, and telecommunications, the susceptibility to common-mode disturbances has become a significant concern. EMC standards, such as IEC 61000-4-9:2019, play a vital role in minimizing disruptions and ensuring the reliable performance of these devices.

Key Concepts in IEC 61000-4-9:2019

The IEC 61000-4-9:2019 standard focuses on conducted, common-mode disturbances caused by power supply systems. It defines test methods and performance criteria for evaluating the immunity of electrical and electronic equipment to these disturbances. Key concepts addressed in this standard include:

Disturbance Sources: IEC 61000-4-9:2019 identifies sources of disturbances, mainly related to the impedance and unbalance of power systems. These sources can lead to voltage fluctuations and transients.

Measurement Setup: The standard outlines the setup for conducting tests to evaluate the immunity of equipment. It considers aspects such as test generators, coupling/decoupling networks, and measurement instrumentation.

Test Procedure: IEC 61000-4-9:2019 provides a step-by-step procedure for performing the tests effectively, ensuring accurate and reliable results. This includes defining test levels, measuring equipment response, and evaluating compliance with the standard.

Performance Criteria: The standard specifies the limits for acceptable performance during conducted, common-mode disturbance tests. Compliance is evaluated based on defined criteria, enabling manufacturers to assess their equipment's immunity.

Conclusion

IEC 61000-4-9:2019 is a significant international standard that addresses the immunity of electrical and electronic equipment to conducted, common-mode disturbances. By adhering to this standard, manufacturers can ensure the reliability and proper functioning of their devices in various environments. As technology continues to evolve, complying with EMC standards becomes increasingly essential to ensure seamless integration and effective operation of electrical and electronic systems.