What is EN 61558-1:2020?

EN 61558-1:2020 is a technical standard that outlines safety requirements for transformers, power supply units, and similar devices used in electrical systems. This standard sets forth guidelines to ensure the safe operation of these devices and prevent electrical hazards. It was published by the International Electrotechnical Commission (IEC) to replace the previous edition, EN 61558-1:2005.

Scope and Purpose

The scope of EN 61558-1:2020 includes a wide range of electrical devices, including transformers, power supply units, reactors, control transformers, and combinations thereof. The standard aims to address potential safety hazards such as electric shock, thermal hazards, fire risks, and mechanical hazards associated with these devices. It establishes minimum requirements for electrical insulation, protective earthing, temperature limits, clearances, and creepage distances.

Key Requirements

EN 61558-1:2020 imposes several key requirements on manufacturers and users of electrical devices covered under its scope. Some of the important requirements include:

1. Dielectric strength: The devices must withstand specified voltage levels without failure or breakdown.

2. Clearances and creepage distances: Adequate distances must be maintained between conductive parts to prevent arcing or accidental contact.

3. Insulation resistance: The devices must have sufficient insulation resistance to avoid current leakage and electrical shock risks.

4. Temperature limits: Devices should operate within defined temperature limits to prevent overheating and thermal hazards.

5. Marking and labeling: Clear instructions and markings must be provided on devices to indicate proper usage, safety precautions, and technical details.

6. Mechanical strength: Devices should have appropriate mechanical strength to endure mechanical stress and prevent hazards due to breakage or deformation.

Compliance and Certification

To demonstrate compliance with EN 61558-1:2020, manufacturers need to ensure that their devices meet all the specified requirements mentioned in the standard. Compliance can be achieved through various means such as design verification, type testing, and production control. Additionally, obtaining certification from recognized organizations or agencies can provide assurance of compliance and help market the products globally.

In conclusion, EN 61558-1:2020 is a crucial standard that sets safety requirements for transformers, power supply units, and related devices. Following these requirements not only helps ensure safe operation but also promotes global acceptance of electrical products. Manufacturers and users should adhere to this standard to mitigate electrical hazards and create a safer environment.