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AS 3439.1-1993

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Low-voltage switchgear and controlgear assemblies - Type-tested and partially type-tested assemblies
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

06-30-2017

Published date

01-01-1993

Publisher

Standards Australia

Preview

1 - AS 3439.1-1993 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES - TYPE-TESTED AND PARTIALLY TYPE-TESTED ASSEMBLIES
4 - PREFACE
8 - CONTENTS
11 - 1 General
11 - 1.1 Scope and object
11 - 1.2 Normative references
13 - 2 Definitions
13 - 2.1 General
13 - 2.1.1 Low-voltage switchgear and control gear assembly (ASSEMBLY)
14 - 2.1.2 Main circuit (of an ASSEMBLY)
14 - 2.1.3 Auxiliary circuit (of an ASSEMBLY)
14 - 2.1.4 Busbar
14 - 2.1.5 Functional unit
14 - 2.1.6 Incoming unit
15 - 2.1.7 Outgoing unit
15 - 2.1.8 Functional group
15 - 2.1.9 Test situation
15 - 2.2 Constructional units of ASSEMBLIES
15 - 2.2.1 Section
15 - 2.2.2 Sub-section
15 - 2.2.3 Compartment
15 - 2.2.4 Barriered section or sub-section
15 - 2.2.5 Transport unit
15 - 2.2.6 Fixed part
15 - 2.2.7 Removable part
16 - 2.2.8 Withdrawable part
16 - 2.2.9 Connected position
16 - 2.2.10 Test position
16 - 2.2.11 Disconnected position (isolated position)
16 - 2.2.12 Removed position
16 - 2.3 External design of ASSEMBLIES
16 - 2.3.1 Open-type ASSEMBLY
16 - 2.3.2 Dead-front ASSEMBLY
16 - 2.3.3 Enclosed ASSEMBLY
17 - 2.3.4 Busbar trunking system (busway)
17 - 2.4 Structural parts of ASSEMBLI ES
17 - 2.4.1 Supporting structure
17 - 2.4.2 Mounting structure
18 - 2.4.3 Mounting panel
18 - 2.4.4 Mounting frame
18 - 2.4.5 Enclosure
18 - 2.4.6 Cover
18 - 2.4.7 Door
18 - 2.4.8 Removable cover
18 - 2.4.9 Cover plate
18 - 2.4.10 Partition
18 - 2.4.11 Barrier
18 - 2.4.12 Obstacle
19 - 2.4.13 Shutter
19 - 2.4.14 Cable entry
19 - 2.5 Conditions of installation of ASSEMBLIES
19 - 2.5.1 ASSEMBLY for indoor installation
19 - 2.5.2 ASSEMBLY for outdoor installation
19 - 2.5.3 Stationary ASSEMBLY
19 - 2.5.4 Movable ASSEMBLY
19 - 2.6 Protective measures with regard to electric shock
19 - 2.6.1 Live part
19 - 2.6.2 Exposed conductive part
20 - 2.6.3 Protective conductor (PE)
20 - 2.6.4 Neutral conductor (N)
20 - 2.6.5 PEN conductor
20 - 2.6.6 Fault current
20 - 2.6.7 Earth fault current
20 - 2.6.8 Protection against direct contact
20 - 2.6.9 Protection against indirect contact
20 - 2.7 Gangways within ASSEMBLIES
20 - 2.7.1 Operating gangway within an ASSEMBLY
20 - 2.7.2 Maintenance gangway within an ASSEMBLY
20 - 2.8 Electronic functions
20 - 2.8.1 Screening
21 - 2.9 Insulation co-ordination
21 - 2.9.1 Clearance
21 - 2.9.2 Isolating distance (of a pole of a mechanical switching device)
21 - 2.9.3 Creepage distance
21 - 2.9.4 Working voltage
21 - 2.9.5 Temporary overvoltage
21 - 2.9.6 Transient overvoltages
21 - 2.9.7 Impulse withstand voltage
22 - 2.9.8 Power-frequency withstand voltage
22 - 2.9.9 Pollution
22 - 2.9.10 Pollution degree (of environmental conditions)
22 - 2.9.11 Micro-environment (of a clearance or creepage distance)
22 - 2.9.12 Overvoltage category (of a circuit or within an electrical system)
22 - 2.9.13 Surge arrester
23 - 2.9.14 Co-ordination of insulation
23 - 2.9.15 Homogeneous (uniform) field
23 - 2.9.16 Inhomogeneous (non-uniform) field
23 - 2.9.17 Tracking
23 - 2.9.18 Comparative tracking index (CTI)
23 - 2.10 Short-circuit currents
23 - 2.10.1 Short-circuit current (Ic) (of a circuit of an ASSEMBLY)
23 - 2.10.2 Prospective short-circuit current (Icp) (of a circuit of an ASSEMBLY)
23 - 2.10.3 Cut-off current; Let-through current
24 - 3 Classification of ASSEMBLI ES
24 - 4 Electrical characteristics of ASSEMBLIES
24 - 4.1 Rated voltages
24 - 4.1.1 Rated operational voltage (of a circuit of an ASSEMBLY)
24 - 4.1.2 Rated insulation voltage (Ui) (of a circuit of an ASSEMBLY)
24 - 4.1.3 Rated impulse withstand voltage (Uimp) (of a circuit of an ASSEMBLY)
25 - 4.2 Rated current (of a circuit of an ASSEMBLY)
25 - 4.3 Rated short-time withstand current (Icw) (of a circuit of an ASSEMBLY)
25 - 4.4 Rated peak withstand current (Ipk) (of a circuit of an ASSEMBLY)
25 - 4.5 Rated conditional short-circuit current (Icc) (of a circuit of an ASSEMBLY)
26 - 4.6 Rated fused short-circuit current (Icf) (of a circuit of an ASSEMBLY)
26 - 4.7 Rated diversity factor
26 - 4.8 Rated frequency
27 - 5 Information to be given regarding the ASSEMBLY
27 - 5.1 Nameplates
27 - 5.2 Markings
28 - 5.3 Instructions for installation, operation and maintenance
28 - 6 Service conditions
28 - 6.1 Normal service conditions
28 - 6.1.1 Ambient air temperature
29 - 6.1.2 Atmospheric conditions
30 - 6.1.3 Altitude
30 - 6.2 Special service conditions
30 - 6.3 Conditions during transport, storage and erection
31 - 7 Design and construction
31 - 7.1 Mechanical design
31 - 7.1.1 General
31 - 7.1.2 Clearances, creepage distances and isolating distances
34 - 7.1.3 Terminals for external conductors
36 - 7.2 Enclosure and degree of protection
36 - 7.2.1 Degree of protection
37 - 7.2.2 Measures to take account of atmospheric humidity
37 - 7.3 Temperature rise
39 - 7.4 Protection against electric shock
39 - 7.4.1 Protection against both direct and indirect contact
39 - 7.4.2 Protection against direct contact
41 - 7.4.3 Protection against indirect contact
46 - 7.4.4 Discharging of electrical charges
47 - 7.4.5 Operating and maintenance gangways within ASSEMBLI ES
47 - 7.4.6 Requirements related to accessibility in service by authorized personnel
48 - 7.5 Short-circuit protection and short-circuit withstand strength
48 - 7.5.1 General
49 - 7.5.2 Information concerning the short-circuit withstand strength
50 - 7.5.3 Relationship between peak and r.m.s. values of short-circuit current
50 - 7.5.4 Co-ordination of short-circuit protective devices
50 - 7.5.5 Circuits within an ASSEMBLY
51 - 7.6 Switching devices and components installed in ASSEMBLIES
51 - 7.6.1 Selection of switching devices and components
52 - 7.6.2 Installation
53 - 7.6.3 Fixed parts
53 - 7.6.4 Removable parts and withdrawable parts
56 - 7.6.5 Identification
56 - 7.7 Internal separation of ASSEMBLIES by barriers or partitions
57 - 7.8 Electrical connections inside an ASSEMBLY: bars and insulated conductors
57 - 7.8.1 General
58 - 7.8.2 Dimensions and rating of busbars and insulated conductors
58 - 7.8.3 Wiring
58 - 7.9 Requirements for electronic equipment supply circuits
59 - 7.9.1 Input voltage variations
59 - 7.9.2 Overvoltages
60 - 7.9.3 Waveform
61 - 7.9.4 Temporary variations in voltage and frequency
61 - 7.10 Electromagnetic compatibility
61 - 7.10.1 ASSEMBLIES not incorporating electronic equipment
62 - 7.10.2 ASSEMBLIES incorporating electronic equipment
62 - 8 Test specifications
62 - 8.1 Classification of tests
62 - 8.1.1 Type tests
62 - 8.1.2 Routine tests
63 - 8.1.3 Testing of devices and self-contained components incorporated in the ASSEMBLY
63 - 8.2 Type tests
63 - 8.2.1 Verification of temperature-rise limits
69 - 8.2.2 Verification of dielectric properties
73 - 8.2.3 Verification of short-circuit withstand strength
78 - 8.2.4 Verification of the effectiveness of the protective circuit
79 - 8.2.5 Verification of clearances and creepage distances
79 - 8.2.6 Verificat ion of mechanical operation
79 - 8.2.7 Verification of degree of protection
80 - 8.2.8 Verification of the properties of insulating materials
80 - 8.3 Routine tests
80 - 8.3.1 Inspection of the ASSEMBLY including inspection of wiring and, if necessary, electrical operation test
80 - 8.3.2 Dielectric test
81 - 8.3.3 Checking of protective measures and of the electrical continuity of the protective circuits
82 - 8.3.4 Verification of insulation resistance
86 - Annex A - Minimum and maximum cross-sections of copper conductors suitable for connection
87 - Annex B - Method of calculating the cross-sectional area of protective conductors with regard to thermal stresses due to current
88 - Annex C - Typical examples of ASSEMBLIES
98 - Annex D - Typical arrangements of forms of separation by barriers or partitions
103 - Annex E - Items subject to agreement between manufacturer and user
104 - Annex F - Measurement of creepage distances and clearances
104 - F.1 Basic principles
104 - F.2 Use of ribs
110 - Annex G - Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of equipment
113 - Annex H - Bibliography
114 - APPENDIX AA - LIST OF VARIATIONS BETWEEN THIS STANDARD AND IEC 439-1
122 - APPENDIX BB - INFORMATION TO BE SUPPLIED BY THE PURCHASER WHEN PLACING ENQUIRY OR ORDER
122 - BB1 GENERAL
122 - BB2 CONCERNING THE INDIVIDUAL CIRCUITS
122 - BB2.1 Information relating to the supply and load circuit
122 - BB2.2 Information relating to equipment in the assembly
122 - BB2.3 Information relating to cables and busbar trunking systems.
123 - BB3 CONCERNING THE ASSEMBLY AS A WHOLE
123 - BB4 INFORMATION RELATING TO SPECIAL SERVICE AND INSTALLATION CONDITIONS
124 - BB5 INFORMATION RELATING TO TESTS
125 - APPENDIX CC - TYPES OF SYSTEM EARTHING
125 - CC1 SCOPE
125 - CC2 TN SYSTEMS
127 - CC3 TT SYSTEM
127 - CC4 IT SYSTEM
128 - APPENDIX DD - GUIDELINES FOR ASSEMBLIES INTENDED TO PROVIDE INCREASED SECURITY AGAINST THE OCCURRENCE OR THE EFFECTS OF INTERNAL
128 - DD1 INTRODUCTION
128 - DD2 OBJECT
128 - DD3 POSSIBLE CAUSES OF FAILURE
129 - DD4 ARCING FAULT CONDITIONS
129 - DD5 MINIMIZATION OF ARCING
129 - DD6 MEANS OF ACHIEVEMENT
131 - APPENDIX EE - INTERNAL ARCING- FAULT TESTS
131 - EE1 INTRODUCTION
131 - EE2 RELEVANCE OF TESTS
131 - EE3 TESTS REQUIRED
132 - EE4 PREPARATION FOR ARCING-FAULT TESTS
132 - EE5 TEST PROCEDURE
132 - EE5.1 General
133 - EE5.2 Tests
133 - EE6 SPECIAL TESTS
134 - EE7 ASSESSMENT OF TEST RESULTS
134 - EE8 TEST REPORTS
135 - APPENDIX FF - SELECTION OF COMPONENTS
135 - FF1 GENERAL
135 - FF2 EXAMPLES OF FACTORS TO BE CONSIDERED
135 - FF2.1 Effect on rated thermal current
135 - FF2.2 Effect on rated short-circuit currents
136 - APPENDIX GG - DIFFERENCES BETWEEN THIS STANDARD AND AS 1136.1-1988
136 - GG1 INTRODUCTION
136 - GG2 DIFFERENCES
139 - APPENDIX HH - COMPARISON OF FORMS OF SEPARATION BETWEEN THIS STANDARD AND AS 1136.1-1988

Specifies requirements for type-tested and partially type-tested low voltage switchgear and controlgear assemblies for rated voltages up to 1000 volt a.c. at frequencies not exceeding 1000 Hz, or 1500 volt d.c. Applies to assemblies intended for use with generation, transmission, distribution and conversion of electrical energy and the control of electrical energy consuming equipment. This Standard is technically equivalent to and has been reproduced from IEC 439-1:1992.

This International Standard applies to low-voltage switchgear and controlgear assemblies (type-tested assemblies (TTA) and partially type-tested assemblies (PTTA)), the rated voltage of which does not exceed 1 000 V a.c. at frequencies not exceeding 1 000 Hz, or 1 500 V d.c.This standard also applies to assemblies incorporating control and/or power equipment, the frequencies of which are higher.In this case, appropriate additional requirements shall apply.This standard applies to stationary or movable assemblies with or without enclosure.NOTE - Additional requirements for certain specific types of assemblies are given in supplementary IEC standards.This standard applies to assemblies intended for use in connection with generation, transmission, distribution and conversion of electric energy and for the control of electric energy consuming equipment.It also applies to such assemblies designed for use under special service conditions, for example in ships, in rail vehicles, for machine tools, for hoistingequipment,or in explosive atmospheres,and for domestic (operated by unskilled persons) applications, provided that the relevant specific requirements are complied with.This standard does not apply to individual devices and self-contained components, such as motor starters, fuse switches, electronic equipment, etc., complying with their relevant standards.The object of this standard is to lay down the definitions and to state the service conditions, construction requirements, technical characteristics and tests for low-voltage switchgear and controlgear assemblies.

Committee
EL-006
DocumentType
Standard
ISBN
0 7262 8623 0
Pages
133
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
IEC 60439-1:1992 Identical

Under Revision see DR 98556 First published as AS 1136-1974.Second edition 1980.Revised and redesignated AS 1136.1-1988.Revised and redesignated AS 3439.1-1993. First published as AS 1136-1974. Second edition 1980. Revised and redesignated AS 1136.1-1988. Revised and redesignated AS 3439.1-1993.

AS 1431.2-1989 Low voltage switchgear and controlgear - Control circuit devices and switching elements - Additional requirements for push-buttons and indicator lights
AS 1136.1-1988 Low voltage switchgear and controlgear assemblies General requirements
AS 1824.1-1995 Insulation co-ordination Definitions, principles and rules
AS 1852.441-1985 International electrotechnical vocabulary - Switchgear, controlgear and fuses
AS 1852.604-1988 International electrotechnical vocabulary Generation, transmission and distribution of electricity - Operation
AS 1104-1978 Informative symbols for use on electrical and electronic equipment
AS 1931.1-1996 High-voltage test techniques - General definitions and test requirements
AS 1029.2-1982 Low voltage contactors - Semiconductor (solid state) (up to and including 1000 V a.c. and 1500 V d.c.)
AS 3865-1991 Calculation of the effects of short-circuit currents
AS 2279.4-1991 Disturbances in mains supply networks - Limitation of voltage fluctuations caused by industrial equipment
AS 1852.471-1988 International electrotechnical vocabulary - Insulators
AS 1202.1-1981 A.C. motor starters (up to and including 1000 V) - Direct-on-line (full voltage) starters
AS 3702-1989 Item designation in electrotechnology
AS 3000-1986 Electrical installations - Buildings, structures and premises (known as the SAA Wiring Rules)
AS 2467-1981 Maintenance of electrical switchgear
AS 2926-1987 Standard voltages - Alternating (50 Hz) and direct
AS 1939-1990 Degrees of protection provided by enclosures for electrical equipment (IP Code)
AS 2279.2-1991 Disturbances in mains supply networks - Limitation of harmonics caused by industrial equipment
AS 3650-1988 Low voltage switchgear and controlgear - Common requirements
AS 2005.1-1981 Fuses with enclosed fuse-links (up to and including 1000 V a.c. and 1500 V d.c.) - General requirements
AS 1955.2-1978 Semiconductor convertors Semiconductor self-commutated convertors
AS 1307.1-1986 Surge arresters (diverters) - Silicon carbide type for a.c. systems
AS 1775-1984 Low voltage switchgear and controlgear - Air-break switches, isolators and fuse-combination units (up to and including 1000 V a.c. and 1200 V d.c.)
AS 1431.1-1989 Low voltage switchgear and controlgear - Control circuit devices and switching elements - General requirements

AS 3439.2-1994 Low-voltage switchgear and controlgear assemblies - Particular requirements for busbar trunking systems (busways)
AS 3439.3-1995 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
AS/NZS 3439.5:2001 Low-voltage switchgear and controlgear assemblies Particular requirements for assemblies intended to be installed outdoors in public places - Cable distribution cabinets (CDCs) for power distribution in networks
AS/NZS 3947.4.2:2000 Low-voltage switchgear and controlgear Contactors and motor-starters - A.C. semiconductor motor controllers and starters
AS 4278-1995 A method for assessing the short-circuit withstand strength of partially type-tested assemblies (PTTA)
AS/NZS 3947.1:1998 Low-voltage switchgear and controlgear General rules
AS 3439.4-1995 Low-voltage switchgear and controlgear assemblies - Particular requirements for assemblies for construction sites (ACS)
AS/NZS 3000:2000 Electrical installations (known as the Australian/New Zealand Wiring Rules)
AS 3947.4.2-1997 Low-voltage switchgear and controlgear Contractors and motor starters - A.C. semiconductor motor controllers and starters
AS/NZS 3947.4.3:2000 Low-voltage switchgear and controlgear Contactors and motor-starters - A.C. semiconductor controllers and contactors for non-motor loads
AS 4388-1996 A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear
AS/NZS 3947.1:2001 Low-voltage switchgear and controlgear General rules
AS 3947.7.2-1996 Low-voltage switchgear and controlgear Ancillary equipment - Protective conductor terminal blocks for copper conductors
AS 4086.2-1997 Secondary batteries for use with stand-alone power systems Installation and maintenance
HB 301-2001 Electrical installations - Designing to the Wiring rules

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