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  • BSI
    BS EN IEC 61558-2-14:2025 Safety of transformers, reactors, power supply units and combinations thereof - Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications
    Edition: 2025
    $447.80
    / user per year

Description of BS EN IEC 61558-2-14:2025 2025

This part of IEC 61558 deals with the safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Variable transformers incorporating electronic circuits are also covered by this document. NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects. Unless otherwise specified, from here onward, the term transformer covers variable transformers for general applications and power supply units incorporating variable 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 together with this document. Where two requirements are in conflict, the most severe take precedence. 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 variable dry-type transformers. - variable auto-transformers; - variable separating transformers; - variable isolating transformers; - variable safety isolating 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 operational frequencies do not exceed 500 Hz. The rated output does not exceed: - 40 kVA for single-phase variable auto-transformers; - 200 kVA for poly-phase variable auto-transformers; - 1 kVA for single-phase variable separating transformers; - 5 kVA for poly-phase variable separating transformers; - 25 kVA for single-phase variable isolating transformers; - 40 kVA for poly-phase variable isolating transformers; - 10 kVA for single-phase variable safety isolating transformers; - 16 kVA for poly-phase variable safety isolating transformers. This document is applicable to variable 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. [...]

Standard NumberBS EN IEC 61558-2-14:2025
TitleSafety of transformers, reactors, power supply units and combinations thereof - Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications
StatusDefinitive
Publication Date2025-03-20
ReplacesBS EN 61558-2-14:2013
Identical National Standard OfEN 61558-2-14 Ed.2.0, IEC 61558-2-14 Ed.2.0
DescriptorsPower transformers, Autotransformers, Electrical equipment, Rated power, Safety isolating transformers, Isolating transformers, Dry-type transformers, Induction-voltage regulators, Thermal properties of materials, Rated frequencies, Mechanical properties of materials, Rated voltage, Electric power systems, Electrical safety, Variable
ICS29.180 Transformers. Reactors
CommitteePEL/96
ISBN978 0 539 17156 3
PublisherBSI
Pages24



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About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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