• IEC 60079-11:2011

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  13-01-2023


    Published date:  30-06-2011

    Publisher:  International Electrotechnical Committee

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Grouping and classification of intrinsically safe
       apparatus and associated apparatus
    5 Levels of protection and ignition compliance
       requirements of electrical apparatus
    6 Apparatus construction
    7 Components on which intrinsic safety depends
    8 Infallible components, infallible assemblies of
       components and infallible connections on which
       intrinsic safety depends
    9 Supplementary requirements for specific apparatus
    10 Type verifications and type tests
    11 Routine verifications and tests
    12 Marking
    13 Documentation
    Annex A (normative) - Assessment of intrinsically safe
    Annex B (normative) - Spark test apparatus for intrinsically
                          safe circuits
    Annex C (informative) - Measurement of creepage distances,
                            clearances and separation distances
                            through casting compound and through
                            solid insulation
    Annex D (normative) - Encapsulation
    Annex E (informative) - Transient energy test
    Annex F (normative) - Alternative separation distances for
                          assembled printed circuit boards and
                          separation of components
    Annex G (normative) - Fieldbus intrinsically safe concept
                          (FISCO) - Apparatus requirements
    Annex H (informative) - Ignition testing of semiconductor
                            limiting power supply circuits

    Abstract - (Show below) - (Hide below)

    IEC 60079-11:2011 is now available as IEC Standards+ 60079-11:2011 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

    IEC 60079-11:2011 specifies the construction and testing of intrinsically safe apparatus intended for use in an explosive atmosphere and for associated apparatus, which is intended for connection to intrinsically safe circuits which enter such atmospheres. This type of protection is applicable to electrical equipment in which the electrical circuits themselves are incapable of causing an explosion in the surrounding explosive atmospheres. This standard is also applicable to electrical equipment or parts of electrical equipment located outside the explosive atmosphere or protected by another Type of Protection listed in IEC 60079-0, where the intrinsic safety of the electrical circuits in the explosive atmosphere may depend upon the design and construction of such electrical equipment or parts of such electrical equipment. The electrical circuits exposed to the explosive atmosphere are evaluated for use in such an atmosphere by applying this standard. The requirements for intrinsically safe systems are provided in IEC 60079-25. This standard supplements and modifies the general requirements of IEC 60079-0, except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirements of this standard shall take precedence. This sixth edition cancels and replaces the fifth edition of IEC 60079-11 published in 2006, the first edition of IEC 61241-11 published in 2005, and partially replaces the second edition of IEC 60079-27 published in 2008 and constitutes a full technical revision. The significant changes with respect to the previous edition are listed below:
    - Inclusion of non-edition specific references to IEC 60079-0.
    - The merging of the apparatus requirements for FISCO from IEC 60079-27.
    - The merging of the requirements for combustible dust atmospheres from IEC 61241-11.
    - Clarification of the requirements for accessories connected to intrinsically safe apparatus; such as chargers and data loggers.
    - Addition of new test requirements for opto-isolators.
    - Introduction of Annex H about ignition testing of semiconductor limiting power supply circuits.
    The contents of the corrigendum of January 2012, the interpretation sheet 1 of October 2014 and the interpretation sheet 2 and 3 of July 2016, 4 of April 2019, 5 of August 2019 and 6 of December 2019 have been included in this copy.

    General Product Information - (Show below) - (Hide below)

    Committee TC 31/SC 31G
    Development Note Supersedes IEC 60079-3 (03/2001) Supersedes IEC 61241-11 and IEC 60079-27. (07/2011) Stability Date: 2020. (09/2017) NEW CHILD ISH 6 2019 IS NOW ADDED
    Document Type Standard
    Product Note NEW CHILD ISH 6 2019 IS NOW ADDED
    Publisher International Electrotechnical Committee
    Status Superseded