What is IEC 60947-5-2:2019?

IEC 60947-5-2:2019, also known as Low-voltage switchgear and controlgear - Part 5-2, is a technical standard published by the International Electrotechnical Commission (IEC). It specifies requirements for circuit-breakers designed for use in electrical installations or equipment within a rated voltage of up to 1000 V AC or 1500 V DC. This article will explore the key aspects of IEC 60947-5-2:2019, its significance and the main changes it brings.

Improved Safety Measures

In order to align with modern safety standards, IEC 60947-5-2:2019 introduces several enhanced safety measures. It mandates features such as clear indication of the circuit-breaker status, visible warning signs, and proper identification of live parts. These measures aim to prevent accidents and provide essential safeguards for both users and maintenance personnel.

An important addition to this edition is an increased emphasis on arc fault containment. According to the standard, circuit-breakers must now be able to effectively extinguish internal arcing faults to avoid spreading fire hazards. This improvement significantly enhances the overall safety of low-voltage switchgear and controlgear.

Efficiency and Reliability

IEC 60947-5-2:2019 focuses not only on safety but also on efficiency and reliability. The standard sets specific performance criteria and tests for circuit-breakers to ensure they can operate under demanding conditions. It covers parameters such as current-carrying capacity, breaking capacity, and short-circuit withstand strength.

This updated version of the standard pays careful attention to the endurance of circuit-breakers. It outlines test procedures and requirements for endurance testing, ensuring that these devices can withstand repetitive switching operations without compromising their performance or reliability. These measures help manufacturers produce higher-quality products that meet the expectations of end-users.

Integration with Modern Technologies

Recognizing the advancements in technology, IEC 60947-5-2:2019 also addresses the integration of electronic components in switchgear and controlgear. It provides guidelines for incorporating these innovations while maintaining compatibility with existing installations.

The standard offers specific recommendations regarding electromagnetic compatibility (EMC). This ensures that when electronic components are used in conjunction with circuit-breakers, they do not interfere with each other's operation, nor cause disturbance in nearby electronic systems.

Furthermore, IEC 60947-5-2:2019 acknowledges the emergence of smart grid technologies and their potential impact on low-voltage switchgear and controlgear. It highlights the need for adaptability and interoperability of circuit-breakers to facilitate the integration of these technologies into electrical networks seamlessly.

In conclusion, IEC 60947-5-2:2019 is a critical standard that enhances the safety, efficiency, and reliability of low-voltage switchgear and controlgear. It introduces improved safety measures, focuses on endurance and performance, and considers the integration of modern technologies. Compliance with this standard assures users that the products they use meet stringent requirements and adhere to international best practices in electrical installations and equipment.