AS/NZS 3439.1:2002
Low-voltage switchgear and controlgear assemblies - Type-tested and partially type-tested assemblies
Applies to type-tested and partially type-tested low-voltage switchgear and controlgear assemblies. Specifies service conditions, construction requirements, technical characteristics and tests. This Standard contains the full text of IEC 60439-1:1999 but has been modified for Australian/New Zealand conditions.
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AS/NZS 3439.1:2002 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - TYPE-TESTED AND PARTIALLY TYPE-TESTED ASSEMBLIES...
PREFACE
CONTENTS
1 General
1.1 Scope and object
1.2 Normative references
2 Definitions
2.1 General
2.1.1 low-voltage switchgear and controlgear ASSEMBLY (ASSEMBLY)
2.1.2 main circuit (of an ASSEMBLY)
2.1.3 auxiliary circuit (of an ASSEMBLY)
2.1.4 busbar
2.1.5 functional unit
2.1.6 incoming unit
2.1.7 outgoing unit
2.1.8 functional group
2.1.9 test situation
2.1.10 disconnected situation
2.1.11 connected situation
2.2 Constructional units of ASSEMBLIES
2.2.1 section
2.2.2 sub-section
2.2.3 compartment
2.2.4 transport unit
2.2.5 fixed part
2.2.6 removable part
2.2.7 withdrawable part
2.2.8 connected position
2.2.9 test position
2.2.10 disconnected position (isolated position)
2.2.11 removed position
2.2.12 electrical connections of functional units
2.3 External design of ASSEMBLIES
2.3.1 open-type
2.3.2 dead- front
2.3.3 enclosed
2.3.4 busbar trunking system (busway)
2.4 Structural parts of ASSEMBLIES
2.4.1 supporting structure
2.4.2 mounting structure
2.4.3 mounting plate
2.4.4 mounting frame*
2.4.5 enclosure
2.4.6 cover
2.4.7 door
2.4.8 removable cover
2.4.9 cover plate
2.4.10 partition
2.4.11 barrier
2.4.12 obstacle
2.4.13 shutter
2.4.14 cable entry
2.4.15 spare spaces
2.4.16 enclosed protected space
2.4.17 insertion interlock
2.5 Conditions of installation of ASSEMBLIES
2.5.1 for indoor installation
2.5.2 for outdoor installation
2.5.3 stationary
2.5.4 movable
2.6 Protective measures with regard to electric shock
2.6.1 live part
2.6.2 exposed conductive part
2.6.3 protective conductor (PE)
2.6.4 neutral conductor (N)
2.6.5 PEN conductor
2.6.6 fault current
2.6.7 earth fault current
2.6.8 protection against direct contact
2.6.9 protection against indirect contact
2.7 Gangways within ASSEMBLIES
2.7.1 operating gangway within an ASSEMBLY
2.7.2 maintenance gangway within an ASSEMBLY
2.8 Electronic functions
2.8.1 screening
2.9 Insulation co-ordination
2.9.1 clearance
2.9.2 isolating distance (of a pole of a mechanical switching device)
2.9.3 creepage distance
2.9.4 working voltage
2.9.5 temporary overvoltage
2.9.6 transient overvoltages
2.9.7 impulse withstand voltage
2.9.8 power-frequency withstand voltage
2.9.9 pollution
2.9.10 pollution degree (of environmental conditions)
2.9.11 micro-environment (of a clearance or creepage distance)
2.9.12 overvoltage category (of a circuit or within an electrical system)
2.9.13 surge arrester
2.9.14 co-ordination of insulation
2.9.15 homogeneous (uniform) field
2.9.16 inhomogeneous (non-uniform) field
2.9.17 tracking
2.9.18 comparative tracking index (CTI)
2.10 Short-circuit currents
2.10.1 short-circuit current (Ic) (of a circuit of an ASSEMBLY)
2.10.2 prospective short-circuit current (Icp) (of a circuit of an ASSEMBLY)
2.10.3 cut-off current; let-through current (Icp) (of a circuit of an ASSEMBLY)
3 Classification of ASSEMBLIES
4 Electrical characteristics of ASSEMBLIES
4.1 Rated voltages
4.1.1 Rated operational voltage (of a circuit of an ASSEBLY)
4.1.2 Rated insulation voltage
4.1.3 Rated impulse withstand voltage
4.2 Rated current
4.3 Rated short-time current
4.4 Rated peak withstand current
4.5 Rated conditional short-circuit current
4.6 Rated fused short-circuit current
4.7 Rated diversity factor
4.8 Rated frequency
5 Information to be given regarding the ASSEMBLY
5.1 Nameplates
5.2 Markings
5.3 Instructions for installation, operation and maintenance
6 Service conditions
6.1 Normal service conditions
6.1.1 Ambient air temperature
6.1.2 Atmospheric conditions
6.1.3 Altitude
6.2 Special service conditions
6.3 Conditions during transport, storage and erection
7 Design and construction
7.1 Mechanical design
7.1.1 General
7.1.2 Clearances, creepage distances and isolating distances
7.1.3 Terminals for external conductors
7.2 Enclosure and degree of protection
7.2.1 Degree of protection
7.2.2 Measures to take account of atmospheric humidity
7.3 Temperature rise
7.4 Protection against electric shock
7.4.1 Protection against both direct and indirect contact
7.4.2 Protection against direct contact
7.4.3 Protection against indirect contact
7.4.4 Discharging of electrical charges
7.4.5 Operating and maintenance gangways within ASSEMBLIES
7.4.6 Requirements related to accessibility in service by authorized personnel
7.5 Short-circuit protection and short- circuit withstand strength
7.5.1 General
7.5.2 Information concerning short-circuit withstand strength
7.5.3 Relationship between peak withstand current and short-time withstand current
7.5.4 Co-ordination of short-circuit protective devices
7.5.5 Circuits within an ASSEMBLY
7.6 Switching devices and components installed in ASSEMBLIES
7.6.1 Selection of switching devices and components
7.6.2 Installation
7.6.3 Fixed parts
7.6.4 Removable parts and withdrawable parts
7.6.5 Identification
7.7 Internal separation of ASSEMBLIES by barriers or partitions
7.7.1 By barriers or partitions (standard construction)
7.7.2 By alternative means to standard construction
7.8 Electrical connections inside an ASSEMBLY: bars and insulated conductors
7.8.1 General
7.8.2 Dimensions and rating of busbars and insulated conductors
7.8.3 Wiring
7.9 Requirements for electronic equipment supply circuits
7.9.1 Input voltage variations
7.9.2 Overvoltages*
7.9.3 Waveform
7.9.4 Temporary variations in voltage and frequency
7.10 Electromagnetic compatibility (EMC)
7.10.1 EMC environment
7.10.2 Requirement for testing
7.10.3 Immunity
7.10.4 Emission
7.11 Description of the types of electrical connections of functional units
8 Test specifications
8.1 Classification of tests
8.1.1 Type tests
8.1.2 Routine tests
8.1.3 Testing of devices and self-contained components incorporated in the ASSEMBLY
8.2 Type tests
8.2.1 Verification of temperature-rise limits
8.2.2 Verification of dielectric properties
8.2.3 Verification of short-circuit withstand strength
8.2.4 Verification of the effectiveness of the protective circuit
8.2.5 Verification of clearances and creepage distances
8.2.6 Verification of mechanical operation
8.2.7 Verification of degree of protection and internal separation
8.2.8 EMC tests
8.3 Routine tests
8.3.1 Inspection of the ASSEMBLY including inspection of wiring and, if necessary, electrical operation test
8.3.2 Dielectric test
8.3.3 Checking of protective measures and of the electrical continuity of the protective circuits
8.3.4 Verification of insulation resistance
Annex A - Minimum and maximum cross-sections of copper conductors suitable for connection
Annex B - Method of calculating the cross-sectional area of protective conductors with regard to thermal stresses due to...
Annex C - Typical examples of ASSEMBLIES
Annex D - Forms of internal separations
Annex E - Items subject to agreement between manufacturer and user
Annex F - Measurement of creepage distances and clearances
F.1 Basic principles
F.2 Use of ribs
Annex G - Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of the equipm
G.1 Introduction
Bibliography
Annex ZA - Information to be supplied by the purchaser when placing an enquiry or order
ZA.1 General
ZA.2 Concerning the individual circuits
ZA.3 Concerning the ASSEMBLY as a whole
ZA.4 Information relating to special service and installation conditions
ZA.5 Information relating to tests
Annex ZB - Types of system earthing
ZB.1 Scope
ZB.2 TN systems
ZB.3 TT System
ZB.4 IT System
Annex ZC - Guidelines for ASSEMBLIES intended to provide increased security against the occurrence or the effects of interna
ZC.1 Introduction
ZC.2 Object
ZC.3 Possible causes of failure
ZC.4 Arcing fault conditions
ZC.5 Minimization of arcing
ZC.6 Means of achievement
Annex ZD - Internal arcing-fault tests
ZD.1 Introduction
ZD.2 Relevance of tests
ZD.3 Tests required
ZD.4 Preparation for arcing-fault tests
ZD.5 Test procedure
ZD.6 Special tests
ZD.7 Assessment of test results
ZD.8 Test reports
Annex ZE - Selection of components
ZE.1 General
ZE.2 Examples of factors to be considered
Annex ZF - Examples of alternative methods of dividing ASSEMBLIES other than partitions or barriers (Metallic or non-metallic
Annex ZG - Differences between this Standard and AS 3439.1-1993
ZG.1 General
ZG.2 Differences
Annex ZZ - Variations to IEC 60439-1:1999 for application in Australia and New Zealand
ZZ1 Introduction
ZZ2 Variations
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Related Information
Electricity (Safety) Regulations 2010
Ministry: WorkSafe New Zealand: Energy Safety
Section: Schedule 4, Clause 5
Citation context:Type-tested and partially type-tested assemblies: AS/NZS 3439.1:2002
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AS/NZS 3439.1:2002 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - TYPE-TESTED AND PARTIALLY TYPE-TESTED ASSEMBLIES...
PREFACE
CONTENTS
1 General
1.1 Scope and object
1.2 Normative references
2 Definitions
2.1 General
2.1.1 low-voltage switchgear and controlgear ASSEMBLY (ASSEMBLY)
2.1.2 main circuit (of an ASSEMBLY)
2.1.3 auxiliary circuit (of an ASSEMBLY)
2.1.4 busbar
2.1.5 functional unit
2.1.6 incoming unit
2.1.7 outgoing unit
2.1.8 functional group
2.1.9 test situation
2.1.10 disconnected situation
2.1.11 connected situation
2.2 Constructional units of ASSEMBLIES
2.2.1 section
2.2.2 sub-section
2.2.3 compartment
2.2.4 transport unit
2.2.5 fixed part
2.2.6 removable part
2.2.7 withdrawable part
2.2.8 connected position
2.2.9 test position
2.2.10 disconnected position (isolated position)
2.2.11 removed position
2.2.12 electrical connections of functional units
2.3 External design of ASSEMBLIES
2.3.1 open-type
2.3.2 dead- front
2.3.3 enclosed
2.3.4 busbar trunking system (busway)
2.4 Structural parts of ASSEMBLIES
2.4.1 supporting structure
2.4.2 mounting structure
2.4.3 mounting plate
2.4.4 mounting frame*
2.4.5 enclosure
2.4.6 cover
2.4.7 door
2.4.8 removable cover
2.4.9 cover plate
2.4.10 partition
2.4.11 barrier
2.4.12 obstacle
2.4.13 shutter
2.4.14 cable entry
2.4.15 spare spaces
2.4.16 enclosed protected space
2.4.17 insertion interlock
2.5 Conditions of installation of ASSEMBLIES
2.5.1 for indoor installation
2.5.2 for outdoor installation
2.5.3 stationary
2.5.4 movable
2.6 Protective measures with regard to electric shock
2.6.1 live part
2.6.2 exposed conductive part
2.6.3 protective conductor (PE)
2.6.4 neutral conductor (N)
2.6.5 PEN conductor
2.6.6 fault current
2.6.7 earth fault current
2.6.8 protection against direct contact
2.6.9 protection against indirect contact
2.7 Gangways within ASSEMBLIES
2.7.1 operating gangway within an ASSEMBLY
2.7.2 maintenance gangway within an ASSEMBLY
2.8 Electronic functions
2.8.1 screening
2.9 Insulation co-ordination
2.9.1 clearance
2.9.2 isolating distance (of a pole of a mechanical switching device)
2.9.3 creepage distance
2.9.4 working voltage
2.9.5 temporary overvoltage
2.9.6 transient overvoltages
2.9.7 impulse withstand voltage
2.9.8 power-frequency withstand voltage
2.9.9 pollution
2.9.10 pollution degree (of environmental conditions)
2.9.11 micro-environment (of a clearance or creepage distance)
2.9.12 overvoltage category (of a circuit or within an electrical system)
2.9.13 surge arrester
2.9.14 co-ordination of insulation
2.9.15 homogeneous (uniform) field
2.9.16 inhomogeneous (non-uniform) field
2.9.17 tracking
2.9.18 comparative tracking index (CTI)
2.10 Short-circuit currents
2.10.1 short-circuit current (Ic) (of a circuit of an ASSEMBLY)
2.10.2 prospective short-circuit current (Icp) (of a circuit of an ASSEMBLY)
2.10.3 cut-off current; let-through current (Icp) (of a circuit of an ASSEMBLY)
3 Classification of ASSEMBLIES
4 Electrical characteristics of ASSEMBLIES
4.1 Rated voltages
4.1.1 Rated operational voltage (of a circuit of an ASSEBLY)
4.1.2 Rated insulation voltage
4.1.3 Rated impulse withstand voltage
4.2 Rated current
4.3 Rated short-time current
4.4 Rated peak withstand current
4.5 Rated conditional short-circuit current
4.6 Rated fused short-circuit current
4.7 Rated diversity factor
4.8 Rated frequency
5 Information to be given regarding the ASSEMBLY
5.1 Nameplates
5.2 Markings
5.3 Instructions for installation, operation and maintenance
6 Service conditions
6.1 Normal service conditions
6.1.1 Ambient air temperature
6.1.2 Atmospheric conditions
6.1.3 Altitude
6.2 Special service conditions
6.3 Conditions during transport, storage and erection
7 Design and construction
7.1 Mechanical design
7.1.1 General
7.1.2 Clearances, creepage distances and isolating distances
7.1.3 Terminals for external conductors
7.2 Enclosure and degree of protection
7.2.1 Degree of protection
7.2.2 Measures to take account of atmospheric humidity
7.3 Temperature rise
7.4 Protection against electric shock
7.4.1 Protection against both direct and indirect contact
7.4.2 Protection against direct contact
7.4.3 Protection against indirect contact
7.4.4 Discharging of electrical charges
7.4.5 Operating and maintenance gangways within ASSEMBLIES
7.4.6 Requirements related to accessibility in service by authorized personnel
7.5 Short-circuit protection and short- circuit withstand strength
7.5.1 General
7.5.2 Information concerning short-circuit withstand strength
7.5.3 Relationship between peak withstand current and short-time withstand current
7.5.4 Co-ordination of short-circuit protective devices
7.5.5 Circuits within an ASSEMBLY
7.6 Switching devices and components installed in ASSEMBLIES
7.6.1 Selection of switching devices and components
7.6.2 Installation
7.6.3 Fixed parts
7.6.4 Removable parts and withdrawable parts
7.6.5 Identification
7.7 Internal separation of ASSEMBLIES by barriers or partitions
7.7.1 By barriers or partitions (standard construction)
7.7.2 By alternative means to standard construction
7.8 Electrical connections inside an ASSEMBLY: bars and insulated conductors
7.8.1 General
7.8.2 Dimensions and rating of busbars and insulated conductors
7.8.3 Wiring
7.9 Requirements for electronic equipment supply circuits
7.9.1 Input voltage variations
7.9.2 Overvoltages*
7.9.3 Waveform
7.9.4 Temporary variations in voltage and frequency
7.10 Electromagnetic compatibility (EMC)
7.10.1 EMC environment
7.10.2 Requirement for testing
7.10.3 Immunity
7.10.4 Emission
7.11 Description of the types of electrical connections of functional units
8 Test specifications
8.1 Classification of tests
8.1.1 Type tests
8.1.2 Routine tests
8.1.3 Testing of devices and self-contained components incorporated in the ASSEMBLY
8.2 Type tests
8.2.1 Verification of temperature-rise limits
8.2.2 Verification of dielectric properties
8.2.3 Verification of short-circuit withstand strength
8.2.4 Verification of the effectiveness of the protective circuit
8.2.5 Verification of clearances and creepage distances
8.2.6 Verification of mechanical operation
8.2.7 Verification of degree of protection and internal separation
8.2.8 EMC tests
8.3 Routine tests
8.3.1 Inspection of the ASSEMBLY including inspection of wiring and, if necessary, electrical operation test
8.3.2 Dielectric test
8.3.3 Checking of protective measures and of the electrical continuity of the protective circuits
8.3.4 Verification of insulation resistance
Annex A - Minimum and maximum cross-sections of copper conductors suitable for connection
Annex B - Method of calculating the cross-sectional area of protective conductors with regard to thermal stresses due to...
Annex C - Typical examples of ASSEMBLIES
Annex D - Forms of internal separations
Annex E - Items subject to agreement between manufacturer and user
Annex F - Measurement of creepage distances and clearances
F.1 Basic principles
F.2 Use of ribs
Annex G - Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of the equipm
G.1 Introduction
Bibliography
Annex ZA - Information to be supplied by the purchaser when placing an enquiry or order
ZA.1 General
ZA.2 Concerning the individual circuits
ZA.3 Concerning the ASSEMBLY as a whole
ZA.4 Information relating to special service and installation conditions
ZA.5 Information relating to tests
Annex ZB - Types of system earthing
ZB.1 Scope
ZB.2 TN systems
ZB.3 TT System
ZB.4 IT System
Annex ZC - Guidelines for ASSEMBLIES intended to provide increased security against the occurrence or the effects of interna
ZC.1 Introduction
ZC.2 Object
ZC.3 Possible causes of failure
ZC.4 Arcing fault conditions
ZC.5 Minimization of arcing
ZC.6 Means of achievement
Annex ZD - Internal arcing-fault tests
ZD.1 Introduction
ZD.2 Relevance of tests
ZD.3 Tests required
ZD.4 Preparation for arcing-fault tests
ZD.5 Test procedure
ZD.6 Special tests
ZD.7 Assessment of test results
ZD.8 Test reports
Annex ZE - Selection of components
ZE.1 General
ZE.2 Examples of factors to be considered
Annex ZF - Examples of alternative methods of dividing ASSEMBLIES other than partitions or barriers (Metallic or non-metallic
Annex ZG - Differences between this Standard and AS 3439.1-1993
ZG.1 General
ZG.2 Differences
Annex ZZ - Variations to IEC 60439-1:1999 for application in Australia and New Zealand
ZZ1 Introduction
ZZ2 Variations
AS/NZS 3439.1:2002
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.