We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
  • AS/NZS 3947.3:2001

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You have already added this standard to your Watchlist.
    Visit My Watchlist to view the full list.

    Low-voltage switchgear and controlgear Switches, disconnectors, switch-disconnectors and fuse-combination units

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  25-06-2021

    Language(s):  English

    Published date:  04-10-2001

    Publisher:  Standards Australia

    Add to Watchlist

    Add To Cart

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

    1 - AS/NZS 3947.3:2001 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - SWITCHES, DISCONNECTORS, SWITCH-DISCONNECTORS AND FUSE-COMBINATIO
    4 - PREFACE
    6 - CONTENTS
    9 - 1 General
    9 - 1.1 Scope and object
    10 - 1.2 Normative references
    11 - 2 Definitions
    12 - 2.1 switch (mechanical)
    12 - 2.2 disconnector
    12 - 2.3 switch-disconnector
    12 - 2.4 fuse-combination unit
    12 - 2.5 switch-fuse
    12 - 2.6 fuse-switch
    12 - 2.7 disconnector-fuse
    12 - 2.8 fuse-disconnector
    12 - 2.9 switch-disconnector-fuse
    13 - 2.10 fuse-switch-disconnector
    13 - 2.11 dependent manual operation (of a mechanical switching device)
    13 - 2.12 independent manual operation (of a mechanical switching device)
    13 - 2.13 semi-independent manual operation
    13 - 2.14 stored energy operation (of a mechanical switching device)
    14 - 3 Classification
    14 - 3.1 According to the utilization category
    14 - 3.2 According to the method of operation of manually operated equipment
    14 - 3.3 According to suitability for isolation
    14 - 3.4 According to the degree of protection provided
    15 - 4 Characteristics
    15 - 4.1 Summary of characteristics
    15 - 4.2 Type of equipment
    15 - 4.2.1 Number of poles
    15 - 4.2.2 Kind of current
    15 - 4.2.3 Number of positions of the main contacts
    15 - 4.3 Rated and limiting values for the main circuit
    15 - 4.3.1 Rated voltages
    15 - 4.3.2 Currents
    16 - 4.3.3 Rated frequency
    16 - 4.3.4 Rated duty
    16 - 4.3.5 Normal load and overload characteristics
    17 - 4.3.6 Short-circuit characteristics
    17 - 4.4 Utilization category
    18 - 4.5 Control circuits
    18 - 4.6 Auxiliary circuits
    18 - 4.7 Relays and releases
    18 - 4.8 Vacant
    18 - 4.9 Switching overvoltages
    18 - 5 Product information
    18 - 5.1 Nature of information
    19 - 5.2 Marking
    20 - 5.3 Instructions for installation, operation and maintenance
    20 - 6 Normal service, mounting and transport conditions
    20 - 7 Constructional and performance requirements
    20 - 7.1 Constructional requirements
    20 - 7.1.1 Materials
    20 - 7.1.3 Clearances and creepage distances
    21 - 7.1.4 Actuator
    21 - 7.1.6 Additional requirements for equipment suitable for isolation
    22 - 7.1.11 Degrees of protection of enclosed equipment
    22 - 7.1.8 Additional requirements for equipment provided with a neutral pole
    22 - 7.2 Performance requirements
    22 - 7.2.1 Operating conditions
    23 - 7.2.2 Temperature rise
    23 - 7.2.3 Dielectric properties
    23 - 7.2.4 Ability to make and break under no-load, normal load and overload conditions
    25 - 7.2.5 Ability to make, break or withstand short-circuit currents
    25 - 7.2.6 Vacant
    25 - 7.2.7 Additional performance requirements for equipment suitable for isolation
    26 - 7.2.8 Vacant
    26 - 7.2.9 Overload requirements for equipment incorporating fuses
    26 - 7.3 Electromagnetic compatibility
    26 - 7.3.1 Vacant
    26 - 7.3.2 Immunity
    26 - 7.3.3 Emission
    27 - 8 Tests
    27 - 8.1 Kind of tests
    27 - 8.1.1 General
    27 - 8.1.2 Type tests
    27 - 8.1.3 Routine tests
    28 - 8.1.4 Sampling tests
    28 - 8.1.5 Special tests
    28 - 8.2 Type tests for constructional requirements
    28 - 8.2.4 Mechanical properties of terminals
    29 - 8.2.5 Verification of the strength of actuator mechanism and position indicating device
    32 - 8.3 Type tests for performance
    32 - 8.3.1 Test sequences
    33 - 8.3.2 General test conditions
    35 - 8.3.3 Test sequence I: General performance characteristics
    38 - 8.3.4 Test sequence II: Operational performance capability
    40 - 8.3.5 Test sequence III: Short-circuit performance capability
    44 - 8.3.6 Test sequence IV: Conditional short-circuit current
    46 - 8.3.7 Test sequence V: Overload performance capability
    47 - 8.4 Electromagnetic compatibility tests
    47 - 8.4.1 Immunity
    47 - 8.4.2 Emission
    47 - 8.5 Special tests
    48 - 8.5.1 Mechanical durability
    48 - 8.5.2 Electrical durability
    49 - Annex A - Equipment for direct switching of a single motor
    49 - A.1 Rated duty
    49 - A.2 Making and breaking capacities
    49 - A.3 Utilization category
    51 - A.4 Operational performance
    52 - A.4 Mechanical durability
    52 - A.5 Electrical durability
    52 - A.6 Verification of making and breaking capacities
    52 - A.7 Operational performance test
    52 - A.8 Special tests
    55 - Annex B - Items subject to agreement between manufacturer and user

    Abstract - (Show below) - (Hide below)

    Applies to switches, disconnectors, switch-disconnectors and fuse-combination units to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1000 V a.c. or 1500 V d.c. Specifies characteristics of equipment, conditions with which the equipment shall comply with reference to operation and behaviour in normal service and specified abnormal conditions and dielectric properties, tests for confirming that these conditions have been met and the methods to be adopted for these tests and the information to be marked on the equipment or supplied by the manufacturer. This Standard is identical to and reproduced from IEC 60947-3:1999 and includes variations made to this document by its Corrigendum:1999/07 and Amendment 1:2001.

    Scope - (Show below) - (Hide below)

    This standard applies to switches, disconnectors, switch-disconnectors and fuse-combination units to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V a.c. or 1 500 V d.c.The manufacturer shall specify the type, ratings and characteristics according to the relevant standard of any incorporated fuses.This standard does not apply to equipment coming within the scope of IEC 60947-2, IEC 60947-4-1 and IEC 60947-5-1; however, when switches and fuse-combination units coming into the scope of this standard are normally used to start, accelerate and/or stop an individual motor they shall also comply with the additional requirements given in annex A.Auxiliary switches fitted to equipment within the scope of this standard shall comply with the requirements of IEC 60947-5-1.This standard does not include the additional requirements necessary for electrical apparatus for explosive gas atmospheres.NOTE 1 – Depending on its design, a switch (or disconnector) can be referred to as "a rotary switch (disconnector)", "cam-operated switch (disconnector)", "knife-switch (disconnector)", etc.NOTE 2 — If they are not manually operated, switches and disconnectors may have to comply with additional requirements.NOTE 2 – In this standard, the word "switch" also applies to the apparatus referred to in French as "commutateurs", intended to modify the connections between several circuits and inter alia to substitute a part of a circuit for another.NOTE 3 – In general, throughout this standard switches, disconnectors, switch-disconnectors and fuse-combination units will be referred to as "equipment".The object of this standard is to statea) the characteristics of the equipment;b) the conditions with which the equipment shall comply with reference to1) operation and behaviour in normal service;2) operation and behaviour in case of specified abnormal conditions, e.g. short circuit;3) dielectric properties;c) the tests for confirming that these conditions have been met and the methods to be adopted for these tests;d) the information to be marked on the equipment or made available by the manufacturer, e.g. in the catalogue.

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

    Committee EL-006
    Document Type Standard
    Product Note Identical to IEC 60947-3 Ed. 2.0.
    Publisher Standards Australia
    Status Superseded
    Superseded By
    Supersedes

    History - (Show below) - (Hide below)

    First published as AS 1775-1975.Second edition 1984.Revised and redesignated AS 3947.3-1994.Jointly revised and designated AS/NZS 3947.3:2001. First published as AS 1775-1975. Second edition 1984. Revised and redesignated AS 3947.3-1994. Jointly revised and designated AS/NZS 3947.3:2001.

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

    AS/NZS 3947.1:2001 Low-voltage switchgear and controlgear General rules
    AS 1102.107-1989 Graphical symbols for electrotechnical documentation - Switchgear, controlgear and protective devices
    AS 1939-1990 Degrees of protection provided by enclosures for electrical equipment (IP Code)
    AS/NZS 61000.4.3:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
    AS/NZS 61000.4.6:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
    AS/NZS 3008.1.2:1998 Electrical installations - Selection of cables - Cables for alternating voltages up to and including 0.6/1 kV - Typical New Zealand installation conditions
    AS 60269.2.1-2005 Low-voltage fuses Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) - Sections I to VI: Examples of types of standardized fuses
    AS/NZS 61000.4.5:1999 Electromagnetic compatibility (EMC) Testing and measurement techniques - Surge immunity test
    AS/NZS 3947.5.1:2000 Low-voltage switchgear and controlgear Control circuit devices and switching elements - Electromechanical control circuit devices
    AS/NZS 3947.2:2002 Low-voltage switchgear and controlgear Circuit-breakers
    AS 1852.441-1985 International electrotechnical vocabulary - Switchgear, controlgear and fuses
    AS 3768-1990 Guide to the effects of temperature on electrical equipment
    AS/NZS 61000.4.3:1999 Electromagnetic compatibility (EMC) Testing and measurement techniques - Radiated radio-frequency electromagnetic field immunity test
    AS/NZS 3947.4.1:2001 Low-voltage switchgear and controlgear Contactors and motor-starters - Electromechanical contactors and motor-starters
    AS 1104-1978 Informative symbols for use on electrical and electronic equipment
    AS/NZS 2064:1997 Limits and methods of measurement of electromagnetic disturbance characteristics of industrial, scientific and medical (ISM) radiofrequency equipment
    AS/NZS 1102.107:1997 Graphical symbols for electrotechnical documentation Switchgear, controlgear and protective devices
    AS/NZS 3560.1:2000 Electric cables - Cross-linked polyethylene insulated - Aerial bundled - For working voltages up to and including 0.6/1(1.2) kV Aluminium conductors (Reconfirmed 2021)
    AS/NZS 61000.4.5:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Surge immunity test
    AS/NZS 61000.4.6:1999 Electromagnetic compatibility (EMC) Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
    AS 2467-1981 Maintenance of electrical switchgear
    AS 3947.2-1997 Low-voltage switchgear and controlgear - Circuit-breakers
    AS/NZS 3008.1.1:1998 Electrical installations - Selection of cables - Cables for alternating voltages up to and including 0.6/1 kV - Typical Australian installation conditions

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

    AS/NZS 3133:2003 Approval and test specification - Air break switches
    AS/NZS 3133:2008 Approval and test specification - Air-break switches
    AS/NZS 61241.0:2005 Electrical apparatus for use in the presence of combustible dust General requirements
    AS 61010.1-2003 Safety requirements for electrical equipment for measurement, control and laboratory use - General requirements (IEC 61010-1:2001, MOD) (Reconfirmed 2016)
    AS 2941-2002 Fixed fire protection installations - Pumpset systems
    AS 60947.4.1-2004 Low-voltage switchgear and controlgear - Contactors and motor-starters - Electromechanical contactors and motor-starters
    AS 1418.14-1996 Cranes (including hoists and winches) Requirements for cranes subject to arduous working conditions
    AS 1418.1-2002 Cranes, hoists and winches General requirements
    AS/NZS 3200.2.22:1997 Approval and test specification - Medical electrical equipment Particular requirements for safety - Diagnostic and therapeutic laser equipment
    AS 2941-2008 Fixed fire protection installations - Pumpset systems
    AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules)
    AS/NZS 3123:2005 Approval and test specification - Plugs, socket-outlets and couplers for general industrial application
    AS 60204.1-2005 Safety of machinery - Electrical equipment of machines General requirements (IEC 60204-1, Ed. 5 (FDIS) MOD)
    AS/NZS 3947.3 SUPP 1:2001 Low-voltage switchgear and controlgear - Switches, disconnectors, switch-disconnectors and fuse-combination units - Fuse-switch-disconnectors and switch-disconnectors for use with low-voltage aerial bundled cables (Supplement to AS/NZS 3947.3:2001)
    AS/NZS 3133:2013 Approval and test specification - Air-break switches
    AS/NZS 3439.1:2002 Low-voltage switchgear and controlgear assemblies Type-tested and partially type tested assemblies (IEC 60439-1:1999 MOD)
    AS 2650-2005 Common specifications for high-voltage switchgear and controlgear standards (IEC 60694 Ed.2.2(2002) MOD)
    AS/NZS 3947.4.1:2001 Low-voltage switchgear and controlgear Contactors and motor-starters - Electromechanical contactors and motor-starters
    AS/NZS 3000:2018 (Unamended Hardcopy + Amendments) Electrical installations (known as the Australian/New Zealand Wiring Rules)
    AS 61818-2005 Application guide for low-voltage fuses
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective