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AS/NZS 5033:2012

[Available Superseded]

Installation and safety requirements for photovoltaic (PV) arrays

Sets out general installation and safety requirements for photovoltaic (PV) arrays, including d.c. array wiring, electrical protection devices, switching and earthing up to but not including energy storage devices, power conversion equipment or loads.
Published: 16/07/2012
Pages: 79
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Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope and general
1.1 Scope and application
1.1.1 Scope
1.1.2 Application
1.2 Objective
1.3 Normative references
1.4 Definitions
2 PV array system configuration
2.1 Configuration
2.1.1 General
2.1.2 PV system architectures
2.1.3 Array electrical diagrams
2.1.4 Use of PCE with multiple d.c. inputs General PCEs with separate maximum power point tracking (MPPT) inputs PCEs with multiple inputs internally connected together in the PCE
2.1.5 Series-parallel configuration
2.1.6 Batteries connected to systems
2.1.7 Considerations due to prospective fault conditions within a PV array
2.1.8 Considerations due to operating temperature
2.1.9 Performance issues
2.2 Mechanical design
2.2.1 General
2.2.2 Thermal aspects
2.2.3 Mechanical loads on PV structures
2.2.4 Mechanical loads—New Zealand only
2.2.5 Wind
2.2.6 Snow/ice accumulation
2.2.7 Corrosion
3 Safety issues
3.1 General
3.2 Protection against electric shock
3.3 Protection against overcurrent
3.3.1 General
3.3.2 Requirement for overcurrent protection
3.3.3 Overcurrent protection in PV systems connected to batteries
3.3.4 String overcurrent protection
3.3.5 Overcurrent protection sizing PV string overcurrent protection PV sub-array overcurrent protection General Small arrays Other arrays PV array overcurrent protection
3.3.6 Overcurrent protection location
3.4 Protection against earth faults
3.4.1 General
3.4.2 Systems with direct functional earthing of the PV array General Additional PCE detection required for functionally earthed PV arrays (see Appendix H)
3.4.3 Earth fault alarm (see Appendix H, Table H1)
3.5 Protection against effects of lightning and overvoltage
3.5.1 General
3.5.2 Protection against overvoltage
3.5.3 Surge protection devices (SPDs) General Surge protection devices (SPDs) d.c. Surge protection devices (SPDs) information technology equipment
4 Selection and installation of electrical equipment
4.1 General
4.2 PV array maximum voltage
4.3 Component requirements
4.3.1 General
4.3.2 PV modules General (see Appendix H, Table H1) Operational conditions and external influences
4.3.3 PV array and PV equipment Environmental effects Location of PV array and PV string combiner boxes
4.3.4 Circuit breakers
4.3.5 Disconnecting devices General Switch-disconnectors Earth fault interrupters
4.3.6 Cables Size Type Installation method General PV array cables within buildings
4.3.7 Plugs, sockets and connectors
4.3.8 Wiring in enclosures
4.3.9 Fuses General Fuse holders
4.3.10 Bypass diodes
4.3.11 Blocking diodes
4.3.12 Power conversion equipment (PCE)
4.4 Location and installation requirements
4.4.1 Disconnecting means General Switch-disconnector for power conversion equipment (PCE) maintenance Installation PV array switch-disconnector (Australia only) PV array switch-disconnector (New Zealand only)
4.4.2 Earthing and bonding arrangements General Earth connection of PV array exposed conductive part Protective equipotential bonding PV array protective bonding
4.4.3 Functional Earthing of PV arrays General Functional earthing terminal of PV system PV system functional earthing conductor
4.4.4 Wiring system General Compliance with wiring standards Wiring loops String wiring Wiring installation in junction and combiner boxes
4.5 Commissioning
5 Marking and documentation
5.1 Equipment marking
5.2 Requirements for signs
5.3 Labelling/signs for PV cables and enclosures
5.3.1 Wiring identification
5.3.2 Signs for PV array and PV string junction boxes
5.4 Fire emergency information
5.5 Labelling/signs for disconnection devices
5.5.1 General
5.5.2 PV array disconnecting device
5.5.3 Sign for systems over 600 V
5.6 Labelling of fuse holders
5.7 Documentation
Appendix A
Appendix B
B1 Examples of earthing system configurations
B2 D.C. switch-disconnector voltage rating requirements
Appendix C
C1 Safety
C2 Periodic maintenance
C3 Operation and maintenance procedures
Appendix D
D1 General
D2 Commissioning tests
D3 PV array—D.C. voltage—Sample commissioning sheet
D3.1 General
D4 Insulation resistance measurement
D5 Sample—PV array—Commissioning sheet
Appendix E
E1 General
E2 Open circuit voltage measurements
E2.1 General
E2.2 Procedure
E2.3 PV arrays and PV sub-arrays measurement
E2.4 Records
E3 Short circuit current
E3.1 General
E3.2 Procedure
E3.3 Records
E4 Infrared scan
E5 PV array tracker operation test (if relevant)
E6 PV array I-V curve
E7 Earth fault protection test (if relevant)
E7.1 General
E7.2 Measurements
E7.3 Procedure
Appendix F
F1 Lightning protection
F2 Application of an external LPS
F3 Choice of external LPS
F4 External LPS
F5 Earthing of external LPS
F5.1 General principle
F5.2 Earth resistance value
F6 Internal LPS—Surge protection
F7 Selection of SPDs installed at the d.c. side of the PV-system
F7.1 General
F7.2 Selection of maximum continuous operating voltage VC
F8 Selection of SPDs appertaining to protection level VP and system immunity
F9 Earthing of SPDs
F10 Screening and shielding
Appendix G
Appendix H
Amendment control sheet
Cited references in this standard
Photovoltaic (PV) module safety qualification — Part 2: Requirements for testing
Low-voltage surge protective devices — Part 22: Surge protective devices connected to telecommunications and signalling networks — Selection and application principles
Thin-film terrestrial photovoltaic (PV) modules — Design qualification and type approval
Photovoltaic (PV) module safety qualification — Part 1: Requirements for construction
EN 61730-2
Photovoltaic module safety qualification, Part 2: Requirements for testing
Content history
[Available Superseded]
[Available Superseded]
[Available Superseded]
[Available Superseded]