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About This Item

 

Full Description

Preface:

This is the second edition of CSA IEC 61558-2-6, Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V — Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers, which is an adoption without modification of the identically titled IEC (International Electrotechnical Commission) Standard 61558-2-6 (second edition, 2009-02). It supersedes the previous edition published in 2003 as CAN/CSA-E61558-2-6 (adopted IEC 61558-2-6:1997), Safety of power transformers, power supply units and similar — Part 2: Particular requirements for safety isolating transformers for general use.

This Standard is intended to be used in conjunction with CAN/CSA-E61558-1:12, Safety of power transformers, power supplies, reactors and similar products — Part 1: General requirements and tests (adopted IEC 61558-1:2005+A1:2009, with Canadian deviations).

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Scope:

This part of IEC 61558 deals with the safety of safety isolating transformers for general applications and power supply units incorporating safety isolating transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard.

NOTE 1 Safety includes electrical, thermal and mechanical aspects.

Unless otherwise specified, from here onward, the term transformer covers safety isolating transformers for general applications and power supply units incorporating safety isolating transformers for general applications.

NOTE 2 For power supply units (linear) this part is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable together with this part.

This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry- type transformers. The windings may be encapsulated or non-encapsulated.

The rated supply voltage does not exceed 1 100 V a.c., and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz.

The rated output does not exceed:
  • 10 kVA for single-phase transformers;
  • 16 kVA for polyphase transformers.
This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer.

NOTE 3 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 50 V a.c. or 120 V ripple-free d.c.

This part is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers.

Transformers covered by this part are used in applications where double or reinforced insulation between circuits is required by the installation rules or by the end product standard.

NOTE 4 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.) may be necessary;
  • measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing should also be considered;
  • the different conditions for transportation, storage, and operation of the transformers should also be considered;
  • additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments.
NOTE 5 Future technological development of transformers may necessitate a need to increase the upper limit of the frequencies, until then this part may be used as a guidance document.
 

Document History

  1. CAN/CSA-IEC 61558-2-6:20

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    Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers

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  2. CAN/CSA E61558-2-6-03 (R2017)


    Safety of Power Transformers, Power Supply Units and Similar - Part 2: Particular Requirements for Safety Isolating Transformers for General Use (Adopted CEI/IEC 61558-2-6:1997, first edition, 1997-02) | Securite des transformateurs, blocs d'alimentation et analogues - Partie 2: Regles particuliere

    • Historical Version