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  • AS/NZS 3947.1:2001

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    Low-voltage switchgear and controlgear General rules

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

    Superseded date:  30-06-2017

    Language(s):  English

    Published date:  25-09-2001

    Publisher:  Standards Australia

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

    1 - AS/NZS 3947.1:2001 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - GENERAL RULES
    4 - PREFACE
    6 - CONTENTS
    11 - 1 General
    11 - 1.1 Scope and object
    12 - 1.2 Normative references
    16 - 2 Definitions
    20 - 2.1 General terms
    20 - 2.1.1 switchgear and controlgear
    20 - 2.1.2 switchgear
    20 - 2.1.3 controlgear
    20 - 2.1.4 over-current
    20 - 2.1.5 short circuit
    21 - 2.1.6 short-circuit current
    21 - 2.1.7 overload
    21 - 2.1.8 overload current
    21 - 2.1.9 ambient air temperature
    21 - 2.1.10 conductive part
    21 - 2.1.11 exposed conductive part
    21 - 2.1.12 extraneous conductive part
    21 - 2.1.13 live part
    21 - 2.1.14 protective conductor (symbol PE)
    22 - 2.1.15 neutral conductor (symbol N)
    22 - 2.1.16 enclosure
    22 - 2.1.17 integral enclosure
    22 - 2.1.18 utilization category
    22 - 2.1.19 isolation (isolating function)
    22 - 2.1.20 electric shock
    22 - 2.2 Switching devices
    22 - 2.2.1 switching device
    22 - 2.2.2 mechanical switching device
    22 - 2.2.3 semiconductor switching device
    23 - 2.2.4 fuse
    23 - 2.2.5 fuse-link
    23 - 2.2.6 fuse-element
    23 - 2.2.7 fuse-combination unit
    23 - 2.2.8 disconnector
    23 - 2.2.9 switch
    23 - 2.2.10 switch-disconnector
    23 - 2.2.11 circuit-breaker
    23 - 2.2.12 contactor
    24 - 2.2.13 semiconductor contactor
    24 - 2.2.14 contactor relay
    24 - 2.2.15 starter
    24 - 2.2.16 control circuit device
    24 - 2.2.17 control switch
    24 - 2.2.18 pilot switch
    24 - 2.2.19 push-button
    24 - 2.2.20 terminal block
    24 - 2.2.21 short-circuit protective device (SCPD)
    24 - 2.2.22 surge arrester
    25 - 2.3 Parts of switching devices
    25 - 2.3.1 pole of a switching device
    25 - 2.3.2 main circuit
    25 - 2.3.3 control circuit
    25 - 2.3.4 auxiliary circuit
    25 - 2.3.5 contact
    25 - 2.3.6 contact piece
    25 - 2.3.7 main contact
    25 - 2.3.8 arcing contact
    25 - 2.3.9 control contact
    26 - 2.3.10 auxiliary contact
    26 - 2.3.11 auxiliary switch
    26 - 2.3.12 "a" contact - make contact
    26 - 2.3.13 "b" contact - break contact
    26 - 2.3.14 relay
    26 - 2.3.15 release
    26 - 2.3.16 actuating system
    26 - 2.3.17 actuator
    26 - 2.3.18 position indicating device
    26 - 2.3.19 indicator light
    26 - 2.3.20 anti-pumping device
    27 - 2.3.21 interlocking device
    27 - 2.3.22 terminal
    27 - 2.3.23 screw-type terminal
    27 - 2.3.24 screwless-type terminal
    27 - 2.3.25 clamping unit
    27 - 2.3.26 unprepared conductor
    27 - 2.3.27 prepared conductor
    27 - 2.4 Operation of switching devices
    27 - 2.4.1 operation
    27 - 2.4.2 operating cycle
    28 - 2.4.3 operating sequence
    28 - 2.4.4 manual control
    28 - 2.4.5 automatic control
    28 - 2.4.6 local control
    28 - 2.4.7 remote control
    28 - 2.4.8 closing operation
    28 - 2.4.9 opening operation
    28 - 2.4.10 positive opening operation
    28 - 2.4.11 positively driven operation
    28 - 2.4.12 dependent manual operation
    28 - 2.4.13 dependent power operation
    29 - 2.4.14 stored energy operation
    29 - 2.4.15 independent manual operation
    29 - 2.4.16 independent power operation
    29 - 2.4.17 actuating force (moment)
    29 - 2.4.18 restoring force (moment)
    29 - 2.4.19 travel
    29 - 2.4.20 closed position
    29 - 2.4.21 open position
    29 - 2.4.22 tripping
    30 - 2.4.23 trip-free mechanical switching device
    30 - 2.4.24 instantaneous relay or release
    30 - 2.4.25 over-current relay or release
    30 - 2.4.26 definite time-delay over-current relay or release
    30 - 2.4.27 inverse time-delay over-current relay or release
    30 - 2.4.28 direct over-current relay or release
    30 - 2.4.29 indirect over-current relay or release
    30 - 2.4.30 overload relay or release
    30 - 2.4.31 thermal overload relay or release
    30 - 2.4.32 magnetic overload relay or release
    31 - 2.4.33 shunt release
    31 - 2.4.34 under-voltage relay or release
    31 - 2.4.35 reverse current relay or release
    31 - 2.4.36 operating current
    31 - 2.4.37 current-setting
    31 - 2.4.38 current setting range
    31 - 2.5 Characteristic quantities
    31 - 2.5.1 nominal value
    31 - 2.5.2 limiting value
    31 - 2.5.3 rated value
    31 - 2.5.4 rating
    32 - 2.5.5 prospective current
    32 - 2.5.6 prospective peak current
    32 - 2.5.7 prospective symmetrical current
    32 - 2.5.8 maximum prospective peak current
    32 - 2.5.9 prospective making current
    32 - 2.5.10 prospective breaking current
    32 - 2.5.11 breaking current
    32 - 2.5.12 breaking capacity
    33 - 2.5.13 making capacity
    33 - 2.5.14 short-circuit breaking capacity
    33 - 2.5.15 short-circuit making capacity
    33 - 2.5.16 critical load current
    33 - 2.5.17 critical short-circuit current
    33 - 2.5.18 Joule integral
    33 - 2.5.19 cut-off current - let-through current
    33 - 2.5.20 time-current characteristic
    33 - 2.5.21 cut-off (current) characteristic - let-through (current) characteristic
    34 - 2.5.22 over-current protective co- ordination of over-current protective devices
    34 - 2.5.23 over-current discrimination
    34 - 2.5.24 back-up protection
    34 - 2.5.25 take-over current
    34 - 2.5.26 short-time delay
    34 - 2.5.27 short-time withstand current
    34 - 2.5.28 peak withstand current
    34 - 2.5.29 conditional short-circuit current
    34 - 2.5.30 conventional non-tripping current
    35 - 2.5.31 conventional tripping current
    35 - 2.5.32 applied voltage
    35 - 2.5.33 recovery voltage
    35 - 2.5.34 transient recovery voltage
    35 - 2.5.35 power-frequency recovery voltage
    35 - 2.5.36 d.c. steady-state recovery voltage
    35 - 2.5.37 prospective transient recovery voltage
    35 - 2.5.38 peak arc voltage
    35 - 2.5.39 opening time
    36 - 2.5.40 arcing time (of a pole or a fuse)
    36 - 2.5.41 arcing time (of a multipole switching device)
    36 - 2.5.42 break time
    36 - 2.5.43 make time
    36 - 2.5.44 closing time
    36 - 2.5.45 make-break time
    36 - 2.5.46 clearance
    36 - 2.5.47 clearance between poles
    36 - 2.5.48 clearance to earth
    36 - 2.5.49 clearance between open contacts (gap)
    36 - 2.5.50 isolating distance
    37 - 2.5.51 creepage distance
    37 - 2.5.52 working voltage
    37 - 2.5.53 temporary overvoltage
    37 - 2.5.54 transient overvoltages
    37 - 2.5.55 impulse withstand voltage
    37 - 2.5.56 power-frequency withstand voltage
    37 - 2.5.57 pollution
    38 - 2.5.58 pollution degree
    38 - 2.5.59 micro-environment
    38 - 2.5.60 overvoltage category
    38 - 2.5.61 co-ordination of insulation
    38 - 2.5.62 homogeneous (uniform) field
    38 - 2.5.63 inhomogeneous (non-uniform) field
    38 - 2.5.64 tracking
    38 - 2.5.65 comparative tracking index (CTI)
    39 - 2.6 Tests
    39 - 2.6.1 type test
    39 - 2.6.2 routine test
    39 - 2.6.3 sampling test
    39 - 2.6.4 special test
    39 - 3 Classification
    39 - 4 Characteristics
    40 - 4.1 General
    41 - 4.2 Type of equipment
    41 - 4.3 Rated and limiting values for the main circuit
    41 - 4.3.1 Rated voltages
    42 - 4.3.2 Currents
    43 - 4.3.3 Rated frequency
    43 - 4.3.4 Rated duties
    45 - 4.3.5 Normal load and overload characteristics
    46 - 4.3.6 Short-circuit characteristics
    46 - 4.4 Utilization category
    47 - 4.5 Control circuits
    47 - 4.5.1 Electrical control circuits
    47 - 4.5.2 Air-supply control circuits (pneumatic or electro-pneumatic)
    47 - 4.6 Auxiliary circuits
    47 - 4.7 Relays and releases
    48 - 4.8 Co-ordination with short-circuit protective devices (SCPD)
    48 - 4.9 Switching overvoltages
    48 - 5 Product information
    48 - 5.1 Nature of information
    49 - 5.2 Marking
    50 - 5.3 Instructions for installation, operation and maintenance
    50 - 6 Normal service, mounting and transport conditions
    50 - 6.1 Normal service conditions
    50 - 6.1.1 Ambient air temperature
    50 - 6.1.2 Altitude
    51 - 6.1.3 Atmospheric conditions
    52 - 6.1.4 Shock and vibration
    52 - 6.2 Conditions during transport and storage
    52 - 6.3 Mounting
    52 - 7 Constructional and performance requirements
    52 - 7.1 Constructional requirements
    52 - 7.1.1 Materials
    53 - 7.1.2 Current-carrying parts and their connections
    53 - 7.1.3 Clearances and creepage distances
    53 - 7.1.4 Actuator
    54 - 7.1.5 Indication of the contact position
    54 - 7.1.6 Additional requirements for equipment suitable for isolation
    56 - 7.1.7 Terminals
    57 - 7.1.8 Additional requirements for equipment provided with a neutral pole
    57 - 7.1.9 Provisions for protective earthing
    58 - 7.1.10 Enclosures for equipment
    59 - 7.1.11 Degrees of protection of enclosed equipment
    59 - 7.1.12 Conduit pull-out, torque and bending with metallic conduits
    59 - 7.2 Performance requirements
    59 - 7.2.1 Operating conditions
    60 - 7.2.2 Temperature-rise
    61 - 7.2.3 Dielectric properties
    64 - 7.2.4 Ability to make, carry and break currents under no-load, normal load and overload conditions
    65 - 7.2.5 Ability to make, carry and break short-circuit currents
    65 - 7.2.6 Switching overvoltages
    65 - 7.2.7 Leakage currents of equipment suitable for isolation
    66 - 7.3 Electromagnetic compatibility (EMC)
    66 - 7.3.1 General
    66 - 7.3.2 Immunity
    66 - 7.3.3 Emission
    67 - 8 Tests
    67 - 8.1 Kinds of test
    67 - 8.1.1 General
    67 - 8.1.2 Type tests
    68 - 8.1.3 Routine tests
    68 - 8.1.4 Sampling tests
    68 - 8.2 Compliance with constructional requirements
    69 - 8.2.1 Materials
    69 - 8.2.2 Equipment
    69 - 8.2.3 Enclosures for equipment
    69 - 8.2.4 Mechanical properties of terminals
    72 - 8.2.5 Verification of the effectiveness of indication of the main contact position of equipment suitable for isolation
    73 - 8.2.6 Test for verification of clamping units transmitting contact pressure through insulating materials other than ceramics
    75 - 8.2.7 Conduit pull-out test, torque test and bending test with metallic conduits
    75 - 8.3 Performance
    75 - 8.3.1 Test sequences
    75 - 8.3.2 General test conditions
    78 - 8.3.3 Performance under no-load, normal load and overload conditions
    89 - 8.3.4 Performance under short-circuit conditions
    94 - 8.4 Tests for EMC
    94 - 8.4.1 Immunity
    94 - 8.4.2 Emission
    122 - Annex A - Examples of utilization categories for low-voltage switchgear and controlgear
    123 - Annex B - Suitability of the equipment when conditions for operation in service differ from the normal conditions
    123 - B.1 Examples of conditions differing from normal
    123 - B.2 Connections with other apparatus
    123 - B.3 Auxiliary contacts
    123 - B.4 Special applications
    124 - Annex C - Degrees of protection of enclosed equipment
    124 - Introduction
    124 - C.1 Scope
    124 - C.2 Object
    124 - C.3 Definitions
    124 - C.4 Designation
    124 - C.5 Degrees of protection against access to hazardous parts and against ingress of solid foreign objects indicated by the...
    124 - C.6 Degrees of protection against ingress of water indicated by the second characteristic numeral
    125 - C.7 Degrees of protection against access to hazardous parts indicated by the additional letter
    125 - C.8 Supplementary letters
    125 - C.9 Examples of designations with IP Code
    125 - C.10 Marking
    125 - C.11 General requirements for tests
    126 - C.12 Tests for protection against access to hazardous parts indicated by the first characteristic numeral
    126 - C.13 Tests for protection against ingress of solid foreign objects indicated by the first characteristic numeral
    126 - C.14 Tests for protection against water indicated by second characteristic numeral
    126 - C.15 Tests for protection against access to hazardous parts indicated by additional letter
    127 - C.16 Summary of responsibilities of relevant technical committees
    130 - Annex D - Examples of terminals
    135 - Annex E - Description of a method for adjusting the load circuit
    137 - Annex F - Determination of short-circuit power-factor or time-constant
    137 - F.1 Determination of short-circuit power-factor
    138 - F.2 Determination of short-circuit time-constant (oscillographic method)
    139 - Annex G - Measurement of creepage distances and clearances
    139 - G.1 Basic principles
    139 - G.2 Use of ribs
    145 - Annex H - Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of equipment
    148 - Annex J - Items subject to agreement between manufacturer and user
    149 - Annex L - Terminal marking and distinctive number
    149 - L.1 General
    149 - L.2 Terminal marking of impedances (alphanumerical)
    151 - L.3 Terminal marking of contact elements for switching devices with two positions (numerical)
    153 - L.4 Terminal
    154 - L.5 Distinctive number
    155 - Annex M - Flammability test
    155 - M.1 Hot wire ignition test
    156 - M.2 Arc ignition test
    158 - Annex N - Requirements and tests for equipment with protective separation
    158 - N.1 General
    158 - N.2 Definitions
    159 - N.3 Requirements
    160 - N.4 Tests
    162 - Annex O - Environmental aspects
    162 - Introduction
    162 - O.1 Scope
    162 - O.2 Definitions
    163 - O.3 General considerations
    164 - O.4 Inputs and outputs to be considered
    165 - O.5 Techniques for identifying and assessing environmental impacts
    166 - O.6 Relevant ISO technical committees
    166 - O.7 Guidance on environmental impact assessment (EIA) principles
    167 - O.8 Guidance on design for environment (DFE) principles
    167 - O.9 Reference documents

    Abstract - (Show below) - (Hide below)

    Applies to switchgear and controlgear intended to be connected to circuits, the rated voltage of which does not exceed 1000 volt a.c. or 1500 volt d.c. This Standard is identical with, and has been reproduced from Consolidated Edition 3.1 of IEC 60947 which includes IEC 60947-1:1999, its Corrigendum 1999-04 and Amendment 1:2000.

    Scope - (Show below) - (Hide below)

    This standard applies, when required by the relevant product standard, to switchgear and controlgear hereinafter referred to as "equipment" and intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.It does not apply to low-voltage switchgear and controlgear assemblies which are dealt with in IEC 60439.NOTE In certain clauses or subclauses of this standard, the equipment covered by this standard is also referred to as "device", to be consistent with the text of such clauses or subclauses.The object of this standard is to state those general rules and requirements which are common to low-voltage equipment as defined in 1.1, including for example: definitions; characteristics; information supplied with the equipment; normal service, mounting and transport conditions; constructional and performance requirements; verification of characteristics and performance.

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

    Committee EL-006
    Document Type Standard
    Publisher Standards Australia
    Status Superseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published in Australia as AS 3650-1988.Revised and redesignated AS 3947.1-1993.Jointly revised and designated AS/NZS 3947.1:1998.Third edition 2001. First published in Australia as AS 3650-1988. Revised and redesignated AS 3947.1-1993. Jointly revised and designated AS/NZS 3947.1:1998. Third edition 2001.

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

    AS/NZS 3947.5.1:2000 Low-voltage switchgear and controlgear Control circuit devices and switching elements - Electromechanical control circuit devices
    AS 1931.1-1996 High-voltage test techniques - General definitions and test requirements
    AS 1099.2.3-1990 Basic environmental testing procedures for electrotechnology Tests - Test Ca - Damp heat, steady state
    AS/NZS 61000.4.5:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Surge immunity test
    AS/NZS 4695.707:1996 Fire hazard testing of electrotechnical products Methods of test for the determination of the flammability of solid electrical insulating materials when exposed to an igniting source
    AS 1852.151-1988 International electrotechnical vocabulary - Electric and magnetic devices
    AS 1931.2-1996 High-voltage test techniques - Measuring systems
    AS/NZS 4695.2.13:1996 Fire hazard testing electrotechnical products Test methods - Glow-wire ignitability test on materials
    AS/NZS 4695.2.11:1996 Fire hazard testing of electrotechnical products Test methods - Glow-wire end-product test and guidance
    AS/NZS 4695.2.10:1996 Fire hazard testing of electrotechnical products Test methods - Glow-wire test methods - General
    AS/NZS 3439.1:2002 Low-voltage switchgear and controlgear assemblies Type-tested and partially type tested assemblies (IEC 60439-1:1999 MOD)
    AS/NZS 3548:1995 Limits and methods of measurement of radio disturbance characteristics of information technology equipment
    AS 1852.826-1983 International electrotechnical vocabulary - Electrical installations of buildings
    AS 1824.1-1995 Insulation co-ordination Definitions, principles and rules
    AS 1939-1990 Degrees of protection provided by enclosures for electrical equipment (IP Code)
    AS/NZS 60269.1:2000 Low-voltage fuses General requirements
    AS/NZS 1102.107:1997 Graphical symbols for electrotechnical documentation Switchgear, controlgear and protective devices
    AS/NZS 4695.112:1996 Fire hazard testing of electrotechnical products Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions
    AS/NZS 60269.2.0:2000 Low-voltage fuses Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application)
    AS/NZS 61000.4.3:1999 Electromagnetic compatibility (EMC) Testing and measurement techniques - Radiated radio-frequency electromagnetic field immunity test
    AS/NZS 61000.4.3:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
    AS 1852.604-1988 International electrotechnical vocabulary Generation, transmission and distribution of electricity - Operation
    AS/NZS 61000.4.5:1999 Electromagnetic compatibility (EMC) Testing and measurement techniques - Surge immunity test
    AS/NZS 4695.2.12:1996 Fire hazard testing of electrotechnical products Test methods - Glow-wire flammability test on materials
    AS 1852.441-1985 International electrotechnical vocabulary - Switchgear, controlgear and fuses
    AS 2768-1985 Electrical insulating materials - Evaluation and classification based on thermal endurance
    AS/NZS 2064:1997 Limits and methods of measurement of electromagnetic disturbance characteristics of industrial, scientific and medical (ISM) radiofrequency equipment
    AS 3439.1-1993 Low-voltage switchgear and controlgear assemblies - Type-tested and partially type-tested assemblies
    AS/NZS 60998.1:1998 Connecting devices for low voltage circuits for household and similar purposes General requirements
    AS/NZS 3000:2000 Electrical installations (known as the Australian/New Zealand Wiring Rules)
    AS/NZS 4695.2.2:1996 Fire hazard testing of electrotechnical products Test methods - Needle-flame test

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

    AS/NZS 3947.3:2001 Low-voltage switchgear and controlgear Switches, disconnectors, switch-disconnectors and fuse-combination units
    AS/NZS 3947.6.1:2001 Low-voltage switchgear and controlgear Multiple Function equipment - Automatic transfer switching equipment
    AS/NZS 3439.3:2002 Low-voltage switchgear and controlgear assemblies Particular requirements for low voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use - Distribution boards (IEC 60439-3:1990 MOD)
    AS/NZS 3947.7.1:2001 Low-voltage switchgear and controlgear Ancillary equipment - Terminal blocks for copper conductors
    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/NZS 3947.2:2002 Low-voltage switchgear and controlgear Circuit-breakers
    AS/NZS 62026.6:2002 Low-voltage switchgear and controlgear - Controller-device interfaces (CDIs) Seriplex (Serial multiplexed control bus)
    AS 1418.1-2002 Cranes, hoists and winches General requirements
    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 3439.1:2002 Low-voltage switchgear and controlgear assemblies Type-tested and partially type tested assemblies (IEC 60439-1:1999 MOD)
    AS/NZS 3947.4.1:2001 Low-voltage switchgear and controlgear Contactors and motor-starters - Electromechanical contactors and motor-starters
    AS/NZS 3947.6.2:2001 Low-voltage switchgear and controlgear Multiple function equipment - Control and protective switching devices (or equipment) (CPS)
    AS/NZS 3000:2018 (Unamended Hardcopy + Amendments) Electrical installations (known as the Australian/New Zealand Wiring Rules)
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