AS/NZS 5033:2021 Installation and safety requirements for photovoltaic (PV) arrays
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Notations
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
2.1.5 Strings constructed using d.c. conditioning units
2.1.6 Series-parallel configuration
2.2 Other considerations
2.2.1 Considerations due to fault conditions within a PV array
2.2.2 Considerations due to operating temperature
2.2.3 Performance issues
3 Safety issues
3.1 Maximum voltage limits
3.2 Protection against electric shock
3.3 Protection against overcurrent
3.3.1 General
3.3.2 Potential fault currents not originating at PV modules
3.3.3 Calculation of potential fault currents originating at PV modules
3.3.4 Requirements for overcurrent protection
3.3.5 Nominal overcurrent protection rating calculations
3.4 Protection against fire caused by arcs
3.5 Protection against earth faults
3.5.1 General
3.5.2 Systems with direct functional earthing of the PV array
3.5.3 Earth fault alarm
3.6 Protection against effects of lightning
4 Selection and installation of electrical equipment
4.1 General
4.2 Voltage and current calculations
4.2.1 PV maximum voltage calculation
4.2.2 PV d.c. circuit current calculation
4.3 PV arrays
4.3.1 Selection of PV modules
4.3.2 Installation of PV modules
4.3.3 PV isolation methods
4.3.4 Selection of load break disconnection devices
4.3.5 Installation of disconnection devices
4.3.6 Selection of overcurrent protection
4.3.7 Installation of overcurrent protection
4.3.8 Selection of plugs, sockets and connectors
4.3.9 Installation of plugs, sockets and connectors
4.3.10 Selection of other PV equipment
4.3.11 Installation of other PV equipment
4.4 Wiring systems
4.4.1 General
4.4.2 Selection of cables
4.4.3 Installation of cables
4.4.4 Selection of wiring enclosures
4.4.5 Installation of wiring enclosures
4.4.6 Selection of enclosures containing conductor terminations
4.4.7 Installation of enclosures containing conductor terminations
4.5 Power conversion equipment
4.5.1 Selection of power conversion equipments
4.5.2 Installation of power conversion equipment
4.5.3 Selection of load break disconnection devices for PCE
4.5.4 Installation of load break disconnection devices
4.6 Earthing arrangements
4.6.1 General
4.6.2 Earthing of PV array exposed conductive parts
4.6.3 Earthing or bonding connections requirements
4.6.4 Connection to installation earth
4.6.5 Earthing or bonding conductor size
4.6.6 PV array earth conductor installation
4.6.7 Direct/Resistive functional earthing of PV arrays
4.7 Verification
4.7.1 General
4.7.2 Visual Inspection requirements for a PV system
4.7.3 Testing
5 Marking
5.1 Equipment marking
5.2 Requirements for labels and signs
5.2.1 General
5.2.2 UV resistance
5.3 Labelling/signs for PV cables and enclosures
5.3.1 Wiring system identification
5.3.2 Signs for junction boxes containing PV d.c. cable terminations
5.4 Fire and emergency information
5.5 Labelling/signs for disconnection device
5.5.1 General
5.5.2 PV disconnecting device
5.6 Recording of solar system layout
5.6.1 General
5.7 Shutdown procedure
5.8 Labelling of fuse holders
6 System documentation and commissioning
6.1 General
6.2 System manual
6.3 Commissioning
6.3.1 General
6.3.2 Commissioning tests
6.3.3 Short circuit currents measurement in PV array
Appendix A (informative) Example of signs
Appendix B (informative) Earthing and d.c. fault conditions
Appendix C (informative) Non-separated inverter fault current paths
Appendix D (informative) Maintenance recommendations
Appendix E (Informative) Testing and commissioning checklists
Appendix F (informative) Additional commissioning tests
Appendix G (informative) Lightning protection
Appendix H (informative) Examples of calculations for determining suitable voltage, thermal current, operational current and making and breaking current for switch disconnectors
Appendix I (normative) Fire tests, spread of flame and burning brand tests
Appendix J (normative) Determination of safety factor (SF) multiplier and KI for ISC MOD for Bifacial installations
Appendix K (normative) Protection against weather and water for dedicated individual enclosures containing switch disconnectors
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