• I.S. EN 60027-1:2006

    Current The latest, up-to-date edition.

    LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY - PART 1: GENERAL

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2006

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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

    FOREWORD
    SECTION 0: GENERAL
    Scope
    SECTION 1: RECOMMENDATIONS FOR PRINTING SYMBOLS AND NUMBERS
    1.1 Symbols for quantities
        1.1.1 Symbols
        1.1.2 Rules for printing of subscripts and use of subscripts
              in electrical technology
        1.1.3 Rules
        1.1.4 Combination of symbols for quantities; elementary
              operations with quantities
        1.1.5 Substitution of letters
    1.2 Names and symbols for units
        1.2.1 International symbols for units
        1.2.2 Combination of symbols for units
        1.2.3 Printing of symbols for units
        1.2.4 Printing and use of prefixes
        1.2.5 Spelling of names of units in the English language
    1.3 Numbers
        1.3.1 Printing of numbers
        1.3.2 Decimal sign
        1.3.3 Multiplication of numbers
    1.4 Mathematical signs and symbols
    1.5 Expressions for quantities
    1.6 Complex representation of quantities
    SECTION 2: GENERAL RECOMMENDATIONS FOR TIME-DEPENDENT QUANTITIES
    2.1 Quantities that vary with time periodically
    2.2 Quantities that vary with time non-periodically
    SECTION 3: SYMBOLS FOR QUANTITIES AND THEIR UNITS, SELECTED
               CONSTANTS AND SIGNS
    3.1 Introduction to tables for quantities and their units
    3.2 Introduction to the tables for subscripts
    3.3 Introduction to the table for mathematical signs and symbols
    3.4 Introduction to the tables for time-dependent quantities
    Annexes
    A Greek alphabet
    B Glossary of terms concerning letter symbols
      B.1 Terms concerning the structure of letter symbols
      B.2 Styles of letters
          B.2.1 Names of various marks added to a kernel (X)
          B.2.2 Illustrative examples
    C Examples of time-dependent quantities
      C.1 Examples of periodic quantities
      C.2 Examples of transient quantities
      C.3 Example of a random quantity
    D Examples of use of source voltage and source current in
      equivalent circuits
    E Special note concerning the rules for the names of
      quantities and units
    F Systems of units and quantities
    G Bibliography

    Abstract - (Show below) - (Hide below)

    Presents information about general quantities, units and their letter symbols and mathematical symbols that are to be used in electrical technology.

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

    Development Note Supersedes I.S. HD 60027-1. (11/2006) For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 31-11:1992 Quantities and units Part 11: Mathematical signs and symbols for use in the physical sciences and technology
    IEC 60375:2003 Conventions concerning electric and magnetic circuits
    ISO 31-2:1992 Quantities and units Part 2: Periodic and related phenomena
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