What is EN 61558-1:2020?

EN 61558 is a series of safety standards for transformers, reactors, power supply units, and similar devices used in electrical equipment. The latest version, EN 61558-1:2020, was issued by the European Committee for Electrotechnical Standardization (CENELEC) and is recognized as the harmonized standard under the Low Voltage Directive in the European Union.

Scope and Purpose

The scope of EN 61558-1:2020 is to ensure the safety of power transformers, instrument transformers, reactors, and similar devices. The standard defines the safety requirements that these devices must meet in order to protect users, prevent hazards resulting from electric shock, and minimize the risk of fire or mechanical injuries.

EN 61558-1:2020 specifies general requirements applicable to all types of transformers and other related devices, regardless of their power rating. It covers aspects such as electrical, thermal, and mechanical characteristics, as well as necessary insulation and environmental conditions.

Main Changes and Updates

EN 61558-1:2020 introduces several important updates compared to its predecessor, EN 61558-1:2005. These changes aim to align the standard with current technological advancements and address potential safety concerns. Some key revisions include:

Updated definitions and terminology to improve clarity and consistency in understanding.

Revised requirements for clearances, creepage distances, and insulation coordination.

Enhanced provisions for protection against moisture and dust ingress.

Improved testing procedures and criteria to ensure compliance.

Compliance and Certification

Manufacturers and suppliers of transformers, reactors, and related devices need to ensure that their products conform to the requirements specified in EN 61558-1:2020. Compliance with this standard is essential for obtaining the CE marking and demonstrating conformity with the Low Voltage Directive in the European market.

Certification bodies carry out testing and assessment procedures to verify compliance with the standard. Once a product has successfully met all the requirements, it can be issued the necessary certification, providing assurance to customers and authorities that the device meets the required safety standards.

Conclusion

EN 61558-1:2020 plays a crucial role in ensuring the safety and performance of power transformers, reactors, and similar electrical devices. By adhering to the requirements outlined in this standard, manufacturers can provide reliable and safe products to consumers, while users can have confidence in the devices they use. Continuous updates and improvements in standards like EN 61558-1:2020 are vital to keeping pace with technological advancements and protecting individuals from potential hazards associated with electrical equipment.