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  • BS 5311:1988

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    SPECIFICATION FOR HIGH-VOLTAGE ALTERNATING CURRENT CIRCUIT BREAKERS

    Available format(s):  Hardcopy, PDF

    Superseded date:  15-04-1996

    Language(s):  English

    Published date:  01-01-1988

    Publisher:  British Standards Institution

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

    National foreword
    Committees responsible
    Chapter I: Service conditions, definitions, rating,
    construction and design
    1. Scope
    2. Normal and special service conditions
    3. Definitions
        3.101 General terms
        3.102 Switching devices
        3.103 Parts of circuit-breakers
        3.104 Operation
        3.105 Characteristic quantities of circuit-breakers
        3.106 Index of definitions
    4. Rating
        4.1 Rated voltage
        4.2 Rated insulation level
        4.3 Rated frequency
        4.4 Rated normal current and temperature rise
        4.5 Rated short-time withstand current
        4.6 Rated peak withstand current
        4.7 Rated duration of short-circuit
        4.8 Rated supply voltage of closing and opening
               devices and auxiliary circuits
        4.9 Rated supply frequency of closing and opening
               devices and auxiliary circuits
        4.10 Rated pressures of compressed gas supply for
               operation and for interruption
        4.101 Rated short-circuit breaking current
        4.102 Rated transient recovery voltage for terminal
               faults
        4.103 Rated short-circuit making current
        4.104 Rated operating sequence
        4.105 Rated characteristics for short-line faults
        4.106 Rated out-of-phase breaking current
        4.107 Rated line-charging breaking current
        4.108 Rated cable-charging breaking current
        4.109 Rated single capacitor bank breaking current
        4.110 Rated back-to-back capacitor bank breaking
               current
        4.111 Rated capacitor bank inrush making current
        4.112 Rated small inductive breaking current
        4.113 Rated time quantities
        4.114 Co-ordination of rated values
    5. Design and construction
        5.1 Requirements for liquids in circuit-breakers
        5.2 Requirements for gases in circuit-breakers
        5.3 Earthing of circuit-breakers
        5.4 Auxiliary equipment
        5.5 Dependent power closing
        5.6 Stored energy closing
        5.7 Operation of releases
        5.8 Low and high pressure interlocking devices
        5.9 Nameplates
        5.101 Requirements for simultaneity of poles
        5.102 General requirement for operation
        5.103 Pressure limits of compressed gas for
               interruption in gas blast circuit-breakers
        5.104 Vent outlets
    Figures 1 to 14
    Chapter II: Tests, selection, orders and installation
    6. Type tests
        6.1 Dielectric tests
        6.2 Radio interference voltage (r.i.v.) tests
        6.3 Temperature-rise tests
        6.4 Measurement of the resistance of the main
               circuit
        6.5 Short-time withstand current and peak
               withstand current tests
        6.101 Mechanical and environmental tests
        6.102 Miscellaneous provision for making and
               breaking tests
        6.103 Test circuits for short circuit making and
               breaking tests
        6.104 Short-circuit test quantities
        6.105 Short-circuit test procedure
        6.106 Basic short-circuit test-duties
        6.107 Critical current tests
        6.108 Single-phase short-circuits tests
        6.109 Short-line fault tests
        6.110 Out-of-phase making and breaking tests
        6.111 Capacitive current switching tests
        6.112 Magnetizing and small inductive current
               switching tests
    7. Routine tests
        7.1 Power frequency voltage withstand dry tests
               on the main circuit
        7.2 Voltage withstand tests on control and
               auxiliary circuits
        7.3 Measurement of the resistance of the main
               circuit
        7.101 Mechanical operating tests
        7.102 Design and visual checks
    8. Guide to the selection of circuit-breakers for
        service
        8.101 General
        8.102 Selection of rated values for service
               conditions
        8.103 Selection of rated values for fault conditions
    9. Information to be given with enquiries, tenders and
        orders
        9.101 Information to be given with enquiries and
               orders
        9.102 Information to be given with tenders
    10. Rules for transport, storage, erection and
        maintenance
        10.1 Conditions during transport, storage and
               erection
        10.2 Erection
        10.3 Maintenance
    Figures 15 to 32
    Chapter III: Appendices
    Appendix AA - Calculation of transient recovery voltages
                  for short-line faults from rated
                  characteristics
    Appendix BB - Capacitor bank inrush currents
    Appendix CC - Records and reports of type tests for
                  making, breaking and short-time current
                  performance
    Appendix DD - Determination of short-circuit power factor
    Appendix EE - Tightness specifications and tests
    Appendix FF - Method of drawing the envelope of the
                  prospective transient recovery voltage of
                  a circuit and determining the
                  representative parameters
    Appendix GG - Methods of determining prospective
                  transient recovery voltage waves
    Appendix HH - Example of a commissioning test programme

    Abstract - (Show below) - (Hide below)

    Describes a.c. circuit breakers for indoor or outdoor installation operating up to 60 Hz on systems above 1,000V. Applicable to three pole circuit breakers in three phase systems and single pole circuit breakers for use in single phase systems. Others subject to agreement between manufacturer and user. Applicable to operating devices of circuit breakers and auxiliary equipment. Circuit breakers with a closing mechanism for dependent manual operation not covered. Does not cover circuit breakers for use on motive power units of electrical traction equipment or those used with overhead lines which include series capacitors. Not applicable to circuit breakers for special conditions.

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

    Committee PEL/92
    Development Note REPLACES PARTS 1-7 OF BS 5311. IMPLEMENTS CENELEC HD 348
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Supersedes

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

    BS 7354:1990 CODE OF PRACTICE FOR DESIGN OF HIGH-VOLTAGE OPEN-TERMINAL STATIONS

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

    BS 923-1:1980 GUIDE ON HIGH-VOLTAGE TESTING TECHNIQUES - GENERAL
    BS 5622-2:1979 (published 1979-01) Guide for insulation co-ordination Application guide
    BS 4727-2:GRP06(1985) : 1985 GLOSSARY OF ELECTROTECHNICAL POWER TELECOMMUNICATION ELECTRONICS LIGHTING AND COLOUR TERMS - TERMS PARTICULAR TO POWER ENGINEERING - SWITCHGEAR & CONTROLGEAR TERMINOLOGY INCLUDING FUSE TERMINOLOGY
    BS 2011-2.1Sa:1977 ENVIRONMENTAL TESTING - TESTS - TEST Sa. SIMULATED SOLAR RADIATION AT GROUND LEVEL
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