What is EN 61558-2-22:2020?

EN 61558-2-22:2020 is an internationally recognized technical standard that sets the requirements for safety isolating transformers, also known as power transformers. This standard specifies the necessary characteristics and tests to ensure the safety and reliability of these transformers when used in various electrical installations.

Importance of EN 61558-2-22:2020

Safety isolating transformers play a critical role in protecting people and equipment from electrical hazards. They provide galvanic isolation between the input and output circuits, minimizing the risk of electric shock and preventing potential damage caused by voltage surges or faults in the electrical system.

The compliance with EN 61558-2-22:2020 ensures that these transformers are designed and manufactured to meet specific safety requirements, making them suitable for use in a wide range of applications where electrical insulation and protection are paramount.

Main Requirements of EN 61558-2-22:2020

EN 61558-2-22:2020 covers various aspects of safety isolating transformers, including construction, clearances, creepage distances, dielectric strength, thermal resistance, and many others. The standard also addresses protection against overcurrents and short circuits, as well as requirements regarding markings, documentation, and testing procedures.

One notable requirement of this standard is the provision of double or reinforced insulation in transformers to ensure an extra level of protection against electric shock. Additionally, the standard specifies maximum temperature limits for the transformer's components, ensuring they do not overheat and cause any safety hazards during operation.

Compliance and Certification

To comply with EN 61558-2-22:2020, manufacturers must rigorously test their safety isolating transformers according to the standard's specified procedures. Once a transformer meets all the requirements, it can be certified and labeled accordingly. The certification provides confidence to users that the transformer they are using has undergone thorough testing and meets the necessary safety standards.

When selecting a safety isolating transformer, it is essential to check whether it complies with EN 61558-2-22:2020. This ensures the transformer has been designed and manufactured to the highest safety standards, providing peace of mind for both installers and end-users.

EN 61558-2-22:2020 plays a vital role in ensuring the safety and reliability of safety isolating transformers. Its requirements set the foundation for the design, manufacturing, and testing processes, ultimately guaranteeing the protection against electrical hazards. Compliance with this standard not only enhances user safety but also contributes to the overall quality and efficiency of electrical installations.