BS EN IEC 61558-2-1:2025

Safety of Transformers, Reactors, Power Supply Units and Combinations Thereof

Particular Requirements and Tests for Separating Transformers and Power Supply Units Incorporating Separating Transformers for General Applications

Introducing the BS EN IEC 61558-2-1:2025, a comprehensive standard that sets the benchmark for safety in the design and operation of transformers, reactors, power supply units, and their combinations. This standard is essential for manufacturers, engineers, and safety professionals who are involved in the development and application of electrical equipment that incorporates separating transformers.

Released on March 20, 2025, this standard is the latest in the series, ensuring that your products meet the most current safety requirements. With a total of 20 pages, it provides detailed guidelines and testing procedures to ensure the highest level of safety and performance.

Key Features and Benefits

• Comprehensive Coverage: This standard covers all aspects of safety for separating transformers and power supply units, ensuring that your products are compliant with the latest safety regulations.
• Up-to-Date Requirements: As a 2025 release, it incorporates the latest technological advancements and safety considerations, providing you with the most current guidelines.
• Detailed Testing Procedures: The standard includes specific tests that must be conducted to verify the safety and reliability of your equipment, ensuring that it meets the highest standards.
• International Recognition: Being part of the IEC standards, it is recognized globally, facilitating international trade and compliance.

Who Should Use This Standard?

This standard is indispensable for a wide range of professionals, including:

• Manufacturers: Ensure that your products are designed and manufactured to meet the latest safety standards, enhancing their marketability and compliance.
• Engineers: Gain a thorough understanding of the safety requirements and testing procedures necessary for the development of safe and reliable electrical equipment.
• Safety Inspectors: Use this standard as a reference to evaluate the safety and compliance of electrical equipment in various applications.
• Regulatory Bodies: Establish guidelines and regulations based on the latest international standards to ensure public safety and product reliability.

Why Choose BS EN IEC 61558-2-1:2025?

Choosing the BS EN IEC 61558-2-1:2025 standard means choosing safety, reliability, and compliance. This standard is meticulously crafted to address the specific needs of separating transformers and power supply units, providing a robust framework for ensuring their safe operation. By adhering to this standard, you not only enhance the safety of your products but also boost their credibility and acceptance in the global market.

Technical Details

Here are some technical details about the standard:

• Standard Number: BS EN IEC 61558-2-1:2025
• Pages: 20
• Release Date: March 20, 2025
• ISBN: 978 0 539 05618 1
• Status: Standard

Conclusion

In a world where safety and compliance are paramount, the BS EN IEC 61558-2-1:2025 standard stands as a critical resource for ensuring the safety and reliability of electrical equipment. Whether you are a manufacturer, engineer, or safety inspector, this standard provides the essential guidelines and testing procedures needed to meet the highest safety standards. Embrace the future of electrical safety with this indispensable standard.

BS EN IEC 61558-2-1:2025

This standard BS EN IEC 61558-2-1:2025 Safety of transformers, reactors, power supply units and combinations thereof is classified in these ICS categories:

• 29.180 Transformers. Reactors

This part of IEC 61558 deals with the safety of separating transformers for general applications and power supply units incorporating separating transformers for general applications. Transformers incorporating electronic circuits are also covered by this document. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers separating transformers for general applications and power supply units incorporating separating transformers for general applications. For power supply units (linear), this document is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable. This document does not apply to transformers covered by IEC 60076-11. This document is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry- type transformers. The windings can be encapsulated or non-encapsulated. The rated supply voltage does not exceed 1 000 V AC and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz. The rated output does not exceed: - 1 kVA for single-phase transformers, - 5 kVA for polyphase transformers; This document is applicable to transformers without limitation of the rated output, subject to an agreement between the purchaser and the manufacturer. NOTE 2 Transformers intended to supply distribution networks are not included in the scope. The no-load output voltage or the rated output voltage does not exceed 1 000 V AC or 1 415 V ripple-free DC. For independent transformers the no-load output voltage and / or the rated output voltage is not less than 50 V AC or 120 V ripple-free DC. This document is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. NOTE 3 Transformers covered by this document are only used in applications where double or reinforced insulation between circuits is not required by the installation rules or by the end product standard. NOTE 4 Normally the separating transformers are intended to be used with equipment to provide voltages different from the supply voltage for the functional requirements of the equipment. The protection against electric shock may be provided or completed by other features of the equipment, such as the body. Parts of output circuits may be connected to the input circuits or to protective earthing. Attention is drawn to the following: - for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.); - measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing; - the different conditions for transportation, storage, and operation of the transformers; - additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments. Future technological development of transformers may necessitate a need to increase the upper limit of the frequencies. Until then this document may be used as a guidance document. This group safety publication focusing on safety guidance is primarily intended to be used as a product safety standard for the products mentioned in the scope, but is also intended to be used by technical committees in the preparation of publications for products similar to those mentioned in the scope of this group safety publication, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51. One of the responsibilities of a technical committee is, wherever applicable, to make use of BSPs and/or GSPs in the preparation of its publications.