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AS/NZS 5033:2005

[Available Superseded]

Installation of photovoltaic (PV) arrays

Specifies electrical installation requirements for PV arrays with an open circuit voltage of up to 600 V d.c. or up to plus or minus 600 V with respect to earth.
Published: 19/05/2005
Pages: 70
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Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope and general
1.1 Scope
1.2 Objective
1.3 Normative references
1.4 Definitions
2 Protection requirements
2.1 General
2.2 Bypass diodes
2.3 Blocking diodes
2.4 Fault current protection
2.4.1 Number of parallel strings without overcurrent protection
2.4.2 Discrimination
2.4.3 PV strings
2.4.4 PV sub-arrays (subdivided PV arrays only)
2.4.5 PV array cables
2.4.6 Location of fault current protection devices
2.5 Disconnecting means
2.5.1 General
2.5.2 Selection and installation
2.5.3 Disconnection device requirements
2.5.4 Extra-low voltage segmentation
2.6 Earth fault protection
2.6.1 General
2.6.2 Earth fault protection settings
2.7 Alarms
2.7.1 Visual alarms
2.7.2 Audible alarms
2.8 Lightning and overvoltage protection
2.8.1 Lightning protection
2.8.2 Overvoltage protection
3 Wiring requirements
3.1 Compliance with AS/NZS 3000
3.2 System voltage
3.3 Installation wiring
3.3.1 General
3.3.2 Wiring loops
3.3.3 String wiring
3.3.4 Wiring installation in junction boxes
3.3.5 Location of PV array and PV sub-array junction boxes
3.4 Cable selection
3.4.1 Cable size
3.4.2 Insulation
3.5 Wiring identification
4 Component requirements
4.1 PV modules
4.1.1 Reliability
4.1.2 Equipment class∗
4.1.2 Equipment class†
4.2 PV array and PV sub-array junction boxes
4.2.1 Environmental effects
4.3 Switching devices
4.3.1 General
4.3.2 Non-load-breaking switches
4.3.3 Current breaking devices
4.4 Plugs, socket-outlets and couplers
4.5 Fuses
4.5.1 Ratings
4.5.2 Fuse holders
5 Earthing
5.1 General
5.1.1 General
5.1.2 Point of connection of PV system earth
5.1.3 PV system earthing cable
5.1.4 Bonding conductors
5.2 PV array system earthing
5.3 Earthing of exposed conductive parts and equipotential bonding (System bonding)
5.4 Equipment earthing
6 Marking and signs
6.1 General
6.2 PV array and PV sub-array junction boxes
6.3 Disconnection devices
6.3.1 General
6.3.2 PV array main switch
6.4 Fire emergency information
7 Documentation
7.1 Design information
7.2 Commissioning information
8 Commissioning tests
8.1 General
8.2 Open circuit voltage
8.2.1 General
8.2.2 Procedure
8.3 Solar isolation device test
9 Case studies
9.1 General
9.2 Examples
Appendix A
A1 PV arrays
A1.1 d.c. vs. a.c. behaviour
A1.2 Series parallel configuration
A1.3 Low fault levels
A2 Fault current protection
A2.1 General
A2.2 Fault current protection rating
A2.3 Number of strings
A2.4 Battery storage
A2.5 Diodes
A2.6 Operating temperature
A3 PV systems
A3.1 Stand‑alone photovoltaic (PV) systems with battery storage
A3.2 Grid-connected photovoltaic (PV) systems
A3.3 Solar water pumping system
Appendix B
B1 General
B2 Thermal aspects
B3 Mechanical loads on PV structures
Appendix C
C1 General
C2 Floating PV arrays
C3 Earthed PV arrays
Appendix D
D1 Background
D1.1 Types of earthing
D1.2 Purpose of earthing
D1.3 General earthing considerations in a PV system
D2 Earthing of equipment conductive parts
D3 Earthing of the PV array (System earth)
D3.1 Options of PV array earthing
D3.2 Typical earthing arrangements for PV arrays
D3.2.1 Unearthed (floating) PV array
D3.2.2 Negative earthed PV array
D3.2.3 Centre tapped earthed PV array
D3.2.4 Centre tapped earthed PV array via capacitor
D4 Comparison between earthing schemes
D4.1 Earth fault behaviour
D4.1.1 Floating systems
D4.1.2 Earthed system
D4.1.3 Capacitively coupled earth systems
D4.2 Electric shock hazard
D4.2.1 Floating systems
D4.2.2 Earthed systems
D4.3 Fire hazard
D4.3.1 Floating systems
D4.3.2 Earthed systems
D4.3.3 Capacitively coupled earthed systems
D5 Other considerations
D5.1 Battery systems
D5.2 Non-isolated inverter systems for PV arrays
D6 References
Appendix E
E1 Floating systems
E2 Earthed systems connected to the load via an isolated power conditioning system
E3 Grid connected systems connected to the load via a non-isolated power conditioning system
Appendix F
F1 Lightning protection
F2 Overvoltage protection
F2.1 Equipotential bonding
F2.2 Wiring loops
F2.3 Surge arresters
F2.3.1 General guide
F2.3.2 Selection
F2.3.3 Usage and installation
F2.3.4 Recommended specifications for surge arresters
F2.4 Shielding
Appendix G
Appendix H
H1 Safety
H2 Periodic maintenance
H3 Operation and maintenance procedures
Appendix I
I1 General
I2 Open circuit voltage measurements
I2.1 General
I2.2 Procedure
I2.3 PV Arrays and sub-arrays measurement
I2.4 Records
I3 Short circuit current
I3.1 General
I3.2 Procedure
I3.3 Records
I4 Infrared scan
I5 PV array tracker operation test (If relevant)
I6 PV array I-V curve
I7 Earth fault protection test (If relevant)
I7.1 General
I7.2 Measurements
I7.3 Procedure
Appendix J
J1 General
J2 Notes on case studies
Amendment control sheet
Cited references in this standard
Electrical installations — Selection of cables, Part 1.1: Cables for alternating voltages up to and including 0.6/1 kV — Typical Australian installation conditions
Photovoltaic (PV) module safety qualification — Part 1: Requirements for construction
Safety signs for the occupational environment
Degrees of protection provided by enclosures (IP Code)
Stand-alone power systems — Safety requirements
Content history
[Available Superseded]
[Available Superseded]
DR 03389