Understanding the EN 61000-4-21:2021 Standard

Electromagnetic compatibility (EMC) is an important aspect of modern technology. With the increasing use of electronic devices in our daily lives, it's crucial to ensure that these devices can coexist without interfering with each other's operations. The EN 61000-4-21:2021 standard provides guidelines and test methods to evaluate the immunity of electronic equipment against voltage dips, interruptions, and variations in supply voltage.

Scope of the Standard

The EN 61000-4-21:2021 standard focuses on testing the immunity of electrical and electronic equipment to repetitive voltage disturbances. These disturbances can occur due to various factors such as transient or steady-state voltage fluctuations caused by faults in the power supply or switching operations. The standard applies to a wide range of equipment, including consumer electronics, industrial machinery, and medical devices.

Test Methods

The standard outlines test procedures to determine the capability of equipment to withstand voltage variations. One of the key parameters assessed is the flicker severity. Flickering lights, caused by voltage dips, can be not only annoying but also affect the normal functioning of sensitive electronic equipment. Test methods outlined in the standard help evaluate the susceptibility of devices to flickering conditions and set appropriate thresholds for acceptable behavior.

Another important aspect covered by the standard is the equipment's ability to cope with voltage interruptions. Voltage interruptions occur when the supply voltage drops below a certain level, affecting the operation of electrical devices. The standard provides guidelines to test the equipment's resistance to voltage interruptions and ensure uninterrupted operation within specified limits. This ensures that devices can handle unexpected voltage fluctuations without malfunctioning or experiencing significant downtime.

Conclusion

The EN 61000-4-21:2021 standard plays a crucial role in ensuring the reliable performance of electrical and electronic equipment in today's interconnected world. By defining test methods and criteria, it helps manufacturers evaluate the immunity of their devices against voltage dips, interruptions, and fluctuations. Compliance with this standard not only ensures a smooth operation of devices but also enhances safety and prevents potential damage in various applications, from consumer electronics to critical medical equipment.