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  • BS 7657:1993

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 FUSES (CUT-OUTS), ANCILLARY TERMINAL BLOCKS AND INTERCONNECTING UNITS UP TO 100 A RATING, FOR POWER SUPPLIES TO BUILDINGS

    Available format(s):  Hardcopy, PDF

    Superseded date:  28-02-2010

    Language(s):  English

    Published date:  01-01-1993

    Publisher:  British Standards Institution

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

    Committees responsible
    Foreword
    Specification
    1. General
    1.1 Scope
    1.2 Vacant
    1.3 References
    2. Definitions
    3. Classification
    4. Characteristics
    4.1 General
    4.2 Type of equipment
    4.3 Rated and limiting values for the main
              circuits
    5. Product information
    5.1 Nature of information
    5.2 Marking
    5.3 Instructions for installation, operation and
              maintenance
    6. Normal service and mounting conditions
    6.1 Normal service conditions
    6.1.1 Ambient air temperature
    6.2 Vacant
    6.3 Mounting
    6.3.101 Type A fuses
    6.3.102 Type B fuses, terminal blocks and inter-
              connecting units
    7. Constructional and performance requirements
    7.1 Constructional requirements
    7.1.1 Materials
    7.1.2 Current carrying parts and their connections
    7.1.2.101 Fuse-carriers
    7.1.2.102 Fuse-bases
    7.1.3 Clearances and creepage distances
    7.1.4 Vacant
    7.1.5 Vacant
    7.1.6 Vacant
    7.1.7 Terminals
    7.1.7.1. Constructional requirements
    7.1.7.2 Connecting capacity
    7.1.7.3 Connection
    7.1.7.4 Terminal identification and marking
    7.1.8 Vacant
    7.1.9 Vacant
    7.1.10 Enclosures for equipment
    7.1.10.1 Design
    7.1.11 Degrees of protection of enclosed equipment
    7.2 Performance requirements
    7.2.1 Vacant
    7.2.2 Temperature-rise
    7.2.2.101 Long-term contact stability
    7.2.2.102 Mechanical endurance
    7.2.3 Dielectric properties
    7.2.101 Performance on overload and short circuits
    8. Tests
    8.1 Kinds of tests
    8.1.1 General
    8.1.2 Type test
    8.2 Conformity with constructional requirements
    8.2.1 Materials
    8.2.1.101 Flammability test
    8.2.2 Equipment
    8.2.2.101 Impact test
    8.2.2.102 Mechanical tests on security of sealing lugs
    8.2.3 Enclosures for equipment
    8.2.3.101 Degree of protection test
    8.2.4 Mechanical properties of terminals
    8.2.4.101 Terminal torque test
    8.3 Performance
    8.3.1 Test sequences
    8.3.2 General test conditions
    8.3.2.1 General requirements
    8.3.2.2 Test quantities
    8.3.2.3 Vacant
    8.3.2.4 Test reports
    8.3.3 Performance under no load, normal load and
              overload
    8.3.3.1 Vacant
    8.3.3.2 Vacant
    8.3.3.3 Temperature-rise
    8.3.3.4 Dielectric properties
    8.3.4 Performance under short-circuit conditions
              for type A and type B fuses
    Annexes
    AA. (informative) Guide to the uninterrupted rated
              current of fuses under various conditions of
              installation
    BB. (normative) Type test sequence for fuses
    Tables
    101. Peak test current
    102. Type tests
    103. Maximum temperature-rise at rated current
    104. Values of overload test current
    AA1. Examples of derating for typical installation
              methods
    Figures
    101. Pillar terminal with direct pressure
    102. Apparatus for impact test
    103. Mechanical tests on security sealing lugs
    List of references

    Abstract - (Show below) - (Hide below)

    Specifies the requirements for fuses (cut outs), ancillary terminal blocks and interconnecting units up to 100 A ratings, for the protection of power supplies to buildings. Coverage includes definitions, product information, and constructional and performance requirements.

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

    Committee PEL/17/2
    Development Note Supersedes 92/21883 DC (10/2005) Supersedes ENA TS 12-10. (05/2006) Reviewed and confirmed by BSI, November 2007. (10/2007)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

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

    BS 2874(1986) : 1986 SPECIFICATION FOR COPPER AND COPPER ALLOY RODS AND SECTIONS (OTHER THAN FORGING STOCK)
    BS 771-2(1980) : 1980 PHENOLIC MOULDING MATERIALS - SPECIFICATION FOR PHYSICAL PROPERTIES OF TYPE L2 MATERIAL
    BS 3643(1963) : LATEST
    BS 923-1(1990) : 1990 GUIDE ON HIGH-VOLTAGE TESTING TECHNIQUES - GENERAL
    BS 3456-201(1990) : 1990 SPECIFICATION FOR SAFETY OF HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - GENERAL REQUIREMENTS
    BS EN 60947-7-1:2009 (published 2009-07) Low-voltage switchgear and controlgear Ancillary equipment. Terminal blocks for copper conductors
    BS 6334(1983) : 1983 METHODS OF TEST FOR THE DETERMINATION OF THE FLAMMABILITY OF SOLID ELECTRICAL INSULATING MATERIALS WHEN EXPOSED TO AN IGNITING SOURCE
    BS 88-1(1988) : 1988 AMD 8310 CARTRIDGE FUSES FOR VOLTAGES UP TO AND INCLUDING 1000 V a.c. AND 1500 V d.c. - SPECIFICATION OF GENERAL REQUIREMENTS
    BS 1361(1971) : 1971 SPECIFICATION FOR CARTRIDGE FUSES FOR A.C. CIRCUITS IN DOMESTIC AND SIMILAR PREMISES
    BS EN 60947-1 : 2007 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 1: GENERAL RULES
    BS EN 60529:1992+A2:2013 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE)
    BS 5669-2(1989) : 1989 PARTICLEBOARD - SPECIFICATION FOR WOOD CHIPBOARD
    BS 1322(1992) : 1992 SPECIFICATION FOR AMINOPLASTIC MOULDING MATERIALS
    BS 771-1(1980) : 1980 PHENOLIC MOULDING MATERIALS - SPECIFICATION FOR PHYSICAL PROPERTIES (EXCLUDING TYPE L2 MATERIAL)
    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 6746(1990) : 1990 SPECIFICATION FOR PVC INSULATION AND SHEATH OF ELECTRIC CABLES
    BS 89-1(1990) : 1990 DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING INSTRUMENTS AND THEIR ACCESSORIES - SPECIFICATION FOR DEFINITIONS AND GENERAL REQUIREMENTS COMMON TO ALL PARTS
    BS 5486-1(1990) : 1990 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - REQUIREMENTS FOR TYPE-TESTED AND PARTIALLY TYPE-TESTED ASSEMBLIES
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