• BS EN 60521:1995

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Class 0.5, 1 and 2 alternating-current watthour meters

    Available format(s):  Hardcopy, PDF

    Superseded date:  04-07-2003

    Language(s):  English

    Published date:  15-09-1995

    Publisher:  British Standards Institution

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

    Explanatory foreword in relation to Class 0.5 meters
    Clause
    1. Scope
    2. Units
    3. Definitions
    4. Classification
    5. Mechanical requirements
    6. Electrical requirements
    7. Marking of Meters
    8. Accuracy
    9. Starting and running with no-load
    10. Adjustment
    APPENDIX A - Graphical symbols for watthour meters
    Annex ZA (normative) Other international publications
                         quoted in this standard with the
                         relevant publications
    Annex ZB (normative) Special national conditions
    TABLES
        I. Clearances and creepage distances
       II. Standard basic currents
      III. Standard reference voltages
       IV. Power loss
        V. Apparent power loss
       VI. Heating
      VII. A.C. Voltage tests
     VIII. Voltage marking
       IX. Voltage and current balance
        X. Reference conditions
       XI. Percentage error limits (single-phase meters and
           polyphase meters balanced loads)
      XII. Percentage error limits (polyphase meters carrying
           a single-phase load, but with balanced polyphase
           voltages applied to voltage circuits)
     XIII. Interpretation of test results
      XIV. Temperature coefficient
       XV. Influence quantities
      XVI. Variations due to short-time overcurrents
     XVII. Variations due to self-heating
    XVIII. Starting currents
      XIX. Minimum range of adjustment

    Abstract - (Show below) - (Hide below)

    Gives type tests for measurement of electrical energy in the frequency range 45 to 65 Hz having a voltage across connection terminals not exceeding 600 V.

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

    Committee PEL/13
    Development Note Supersedes BS 5685-1(1979) Inactive for new design. (03/2004)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS EN 60514:1995 Acceptance inspection of class 2 alternating-current watthour meters
    BS 7856:1996 Code of practice for design of alternating current, watthour meters for active energy (classes 1 and 2)

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

    BS 7003:1988 Specification for spring-operated impact-test apparatus and its calibration
    BS EN 60514:1995 Acceptance inspection of class 2 alternating-current watthour meters
    BS 6458-2.1:1984 Fire hazard testing for electrotechnical products. Test methods Glow-wire test
    BS EN 60060-2:1995 High-voltage test techniques Measuring systems
    BS 5458:1977 Specification for safety requirements for indicating and recording electrical measuring instruments and their accessories
    BS 7697:1993 Nominal voltages for low voltage public electricity supply systems
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