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  • BS 3535-1(1996) : 1996

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    ISOLATING TRANSFORMERS AND SAFETY ISOLATING TRANSFORMERS - REQUIREMENTS

    Available format(s): 

    Superseded date:  07-04-2003

    Language(s): 

    Published date:  23-11-2012

    Publisher:  British Standards Institution

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

    General plan of the Standard
    Chapter 1: General requirements
    1 Scope and object
    2 Definitions
    3 General requirement
    4 General notes on tests
    5 Rating
    6 Classification
    7 Marking
    8 Protection against electric shock
    9 Change of input voltage setting
    10 Output voltage and output current under load
    11 No-load output voltage
    12 Short-circuit voltage
    13 Heating
    14 Short-circuit and overload protection
    15 Mechanical strength
    16 Protection against harmful ingress of water and
         moisture
    17 Insulation resistance and electric strength
    18 Construction
    19 Components
    20 Internal wiring
    21 Supply connection and external flexible cables and
         cords
    22 Terminals for external conductors
    23 Provision for protective earthing
    24 Screws and connections
    25 Creepage distances, clearances and distances through
         insulation
    26 Resistance to heat, abnormal heat, fire and tracking
    27 Resistance to rusting
    Appendix A
    Appendix IA Production tests
    Appendix IA Examples to be used as guide for sub-clause 8.6
    Appendix IC Examples of points of application of test
                voltages
    Appendix ID Measurement of creepage distances and
                clearances
    Appendix IE Examples of points of measurement of creepage
                distances and clearances
    Chapter II: Supplementary requirements for isolating
                transformers
    Section one - Isolating transformers for general use,
    shaver transformers and shaver supply units
    2 Definitions
    5 Rating
    7 Marking
    8 Protection against electric shock
    11 No-load output voltage
    13 Heating
    14 Short-circuit and overload protection
    15 Mechanical strength
    18 Construction
    19 Components
    21 Supply connection and external flexible cables and
         cords
    22 Terminals for external conductors
    23 Provision for earthing
    Appendix II-I-A Requirements for special socket-outlets
    for shaver supply units
    Chapter III: Supplementary requirements for safety
    isolating transformers
    Section one - Safety isolating transformers for general
    use
    5 Rating
    7 Marking
    8 Protection against electric shock
    11 No-load output voltage
    21 Supply connection and external flexible cables and
         cords
    Section two - Transformers for toys
    2 Definitions
    4 General notes on tests
    5 Rating
    7 Marking
    8 Protection against electric shock
    9 Change of input voltage setting
    10 Output voltage and output current under load
    11 No-load output voltage
    12 Short-circuit voltage
    14 Short-circuit and overload protection
    15 Mechanical strength
    18 Construction
    19 Components
    21 Supply connection and external flexible cables
         and cords
    Section three - Bell transformers
    2 Definitions
    4 General notes on tests
    5 Rating
    6 Classification
    7 Marking
    8 Protection against electric shock
    10 Output voltage and output current under load
    11 No-load output voltage
    13 Heating
    14 Short-circuit and overload protection
    15 Mechanical strength
    18 Construction
    19 Components
    21 Supply connection and external flexible cables and
         cords
    22 Terminals for external conductors
    23 Provision for earthing
    Appendix II-I-A Requirements for special socket-outlets
    for shaver supply units
    Chapter III: Supplementary requirements for safety
    isolating transformers
    Section one - Safety isolating transformers for general
    use
    5 Rating
    7 Marking
    8 Protection against electric shock
    11 No-load output voltage
    21 Supply connection and external flexible cables and
         cords
    Section two - Transformers for toys
    2 Definitions
    4 General notes on tests
    5 Rating
    7 Marking
    8 Protection against electric shock
    9 Change of input voltage setting
    10 Output voltage and output current under load
    11 No-load output voltage
    12 Short-circuit voltage
    14 Short-circuit and overload protection
    15 Mechanical strength
    18 Construction
    19 Components
    21 Supply connection and external flexible cables and
         cords
    Section three - Bell transformers
    2 Definitions
    4 General notes on tests
    5 Rating
    6 Classification
    7 Marking
    8 Protection against electric shock
    10 Output voltage and output current under load
    11 No-load output voltage
    13 Heating
    14 Short-circuit and overload protection
    15 Mechanical strength
    18 Construction
    19 Components
    21 Supply connection and external flexible cables and
         cords
    22 Terminals for external conductors
    24 Screws and connections
    Section four - Transformers for class III handlamps
    2 Definitions
    5 Rating
    7 Marking
    8 Protection against electric shock
    10 Output voltage and output current under load
    11 No-load output voltage
    18 Construction
    21 Supply connection and external flexible cables and
         cords
    Figures
    Annex ZA (normative) Testing of a series of transformers
    Annex ZB (normative) Other international publications
    quoted in this standard with the references of the
    relevant European publications
    Annex ZC (normative) Special national conditions

    Abstract - (Show below) - (Hide below)

    ALSO NUMBERED AS BS EN 60742 1996 Specifies requirements for stationary or portable, single-phase or polyphase air-cooled isolating and safety isolating transformers.

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

    Committee PEL/96
    Development Note Also numbered as BS EN 60742 Supersedes BS 3535-1(1990) which remains current. Supersedes 90/25293 DC (01/2003)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

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

    BS 4737-2(1986) : 1986 INTRUDER ALARM SYSTEMS IN BUILDINGS - PART 2: SPECIFICATION FOR INSTALLED SYSTEMS FOR DELIBERATE OPERATION
    BS EN 60598-2-6 : 1995 LUMINAIRES - PARTICULAR REQUIREMENTS - PART 2-6: LUMINAIRES WITH BUILT-IN TRANSFORMERS FOR FILAMENT LAMPS
    BS EN 61046 : 1995 SPECIFICATION FOR D.C. OR A.C. SUPPLIED ELECTRONIC STEP-DOWN CONVERTORS FOR FILAMENT LAMPS - GENERAL AND SAFETY REQUIREMENTS
    BS 3535-2(1990) : 1990 ISOLATING TRANSFORMERS AND SAFETY ISOLATING TRANSFORMERS - SPECIFICATION FOR TRANSFORMERS FOR REDUCED SYSTEM VOLTAGE
    DD ENV 1954 : 1997 INTERNAL AND EXTERNAL FAULT BEHAVIOUR OF SAFETY RELATED ELECTRONIC PARTS OF GAS APPLIANCES
    BS 7375(1996) : 1996 CODE OF PRACTICE FOR DISTRIBUTION OF ELECTRICITY ON CONSTRUCTION AND BUILDING SITES
    BS 6440(1999) : 1999 POWERED LIFTING PLATFORMS FOR USE BY DISABLED PERSONS - CODE OF PRACTICE
    BS 5900(1999) : 1999 SPECIFICATION FOR POWERED DOMESTIC LIFTS WITH PARTIALLY ENCLOSED CARS AND NO LIFT-WELL ENCLOSURES

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

    IEC 60038:2009 IEC standard voltages
    BS 6141(1991) : 1991 SPECIFICATION FOR INSULATED CABLES AND FLEXIBLE CORDS FOR USE IN HIGH TEMPERATURE ZONES
    BS 6004(2000) : 2000 ELECTRIC CABLES - PVC INSULATED, NON-ARMOURED CABLES FOR VOLTAGES UP TO AND INCLUDING 450/750 V, FOR ELECTRIC POWER, LIGHTING AND INTERNAL WIRING
    BS 4491-1(1989) : 1989 APPLIANCE COUPLERS FOR HOUSEHOLD AND SIMILAR GENERAL PURPOSES - SPECIFICATION OF GENERAL REQUIREMENTS
    IEC 60884-1:2002+AMD1:2006+AMD2:2013 CSV Plugs and socket-outlets for household and similar purposes - Part1: General requirements
    BS EN 60999 : 1993 CONNECTING DEVICES - SAFETY REQUIREMENTS FOR SCREW-TYPE AND SCREWLESS-TYPE CLAMPING UNITS FOR ELECTRICAL COPPER CONDUCTORS
    BS EN 60068-2-32 : 1993 ENVIRONMENTAL TESTING - TEST METHODS - TEST ED - FREE FALL
    BS 6726(1998) : 1998 SPECIFICATION FOR FESTOON AND TEMPORARY LIGHTING CABLES AND CORDS
    IEC 60685-2-1 : 1ED 80 CONNECTING DEVICES (JUNCTION AND/OR TAPPING) FOR HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS - PARTICULAR REQUIREMENTS, SCREWLESS TERMINALS CONNECTING COPPER CONDUCTORS WITHOUT SPECIAL PREPARATION
    BS 7211(1998) : 1998 ELECTRIC CABLES - THERMOSETTING INSULATED, NON-ARMOURED CABLES FOR VOLTAGES UP TO AND INCLUDING 450/750 V, FOR ELECTRIC POWER, LIGHTING AND INTERNAL WIRING, AND HAVING LOW EMISSION OF SMOKE AND CORROSIVE GASES WHEN AFFECTED BY FIRE
    BS 7671(2001) : 2001 AMD 14905 REQUIREMENTS FOR ELECTRICAL INSTALLATIONS
    BS 5099(1992) : 1992 SPECIFICATION FOR SPARK TESTING OF ELECTRIC CABLES
    BS EN 60269-2 : 1995 LOW-VOLTAGE FUSES - PART 2: SUPPLEMENTARY REQUIREMENTS FOR FUSES FOR USE BY AUTHORIZED PERSONS (FUSES MAINLY FOR INDUSTRIAL APPLICATION)
    IEC 60685-1 : 1ED 80 CONNECTING DEVICES (JUNCTION AND/OR TAPPING) FOR HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS - GENERAL REQUIREMENTS
    BS 2757(1986) : 1986 METHOD FOR DETERMINING THE THERMAL CLASSIFICATION OF ELECTRICAL INSULATION
    HD 365 : 200S3 CLASSIFICATION OF DEGREES OF PROTECTION PROVIDED BY ENCLOSURES
    BS EN 60068-2-2:2007 (published 2007-10) Environmental testing Tests. Test B. Dry heat
    BS 6899(1991) : 1991 SPECIFICATION FOR RUBBER INSULATION AND SHEATH OF ELECTRIC CABLES
    BS EN 60065 : 2014 AUDIO, VIDEO AND SIMILAR ELECTRONIC APPARATUS - SAFETY REQUIREMENTS (IEC 60065:2014, MODIFIED)
    BS EN 61058-1 : 2002 SWITCHES FOR APPLIANCES - PART 1: GENERAL REQUIREMENTS
    BS EN 60269-3 : 1995 LOW-VOLTAGE FUSES - PART 3: SUPPLEMENTARY REQUIREMENTS FOR FUSES FOR USE BY UNSKILLED PERSONS (FUSES MAINLY FOR HOUSEHOLD AND SIMILAR APPLICATIONS)
    BS 6007(2000) : 2000 ELECTRIC CABLES - SINGLE CORE UNSHEATHED HEAT RESISTING CABLES FOR VOLTAGES UP TO AND INCLUDING 450/750 V, FOR INTERNAL WIRING
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