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AS/NZS 5033:2005

AvailableSuperseded
AvailableSuperseded

An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard. Its availability is maintained where it is referenced in legislation/regulations or in other Standards and its use should be restricted to where so referenced. No responsibility is taken by Intertek Inform as to the ongoing technical validity of such a Standard, the responsibility resting with the referencing authority.

Installation of photovoltaic (PV) arrays
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Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Published date

05-19-2005

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1 - AS/NZS 5033:2005 INSTALLATION OF PHOTOVOLTAIC (PV) ARRAYS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 OBJECTIVE
7 - 1.3 NORMATIVE REFERENCES
9 - 1.4 DEFINITIONS
9 - 1.4.1 Accessible, readily
9 - 1.4.2 Active (or active conductor)
9 - 1.4.3 Available, readily
9 - 1.4.4 Bypass diode
9 - 1.4.5 Cable
9 - 1.4.6 Cable, armoured
9 - 1.4.7 Cable core
9 - 1.4.8 Class II equipment
10 - 1.4.9 Insulation monitor
10 - 1.4.10 Installation earth
10 - 1.4.11 ISC ARRAY
10 - 1.4.12 ISC MOD
10 - 1.4.13 I MOD REVERSE
10 - 1.4.14 ISC S-ARRAY
10 - 1.4.15 Junction box
10 - 1.4.16 Live part
10 - 1.4.17 PARRAY
11 - 1.4.18 PELV (protected extra-low voltage)
11 - 1.4.19 Power conditioning unit (PCU)
11 - 1.4.20 Power conditioning unit (PCU), isolated
11 - 1.4.21 Power conditioning unit (PCU), non-isolated
11 - 1.4.22 PV array
11 - 1.4.23 PV array cable
11 - 1.4.24 PV array, earthed
11 - 1.4.25 PV array, floating
11 - 1.4.26 PV array, isolated
12 - 1.4.27 PV array junction box
12 - 1.4.28 PV array voltage
12 - 1.4.29 PV cell
12 - 1.4.30 PV module
12 - 1.4.31 PV module junction box
12 - 1.4.32 PV string
12 - 1.4.33 PV string cable
12 - 1.4.34 PV sub-array
12 - 1.4.35 PV sub-array cable
12 - 1.4.36 PV sub-array junction box
13 - 1.4.37 Ripple-free d.c.
13 - 1.4.38 SELV (separated extra-low voltage)
13 - 1.4.39 Shall
13 - 1.4.40 Should
13 - 1.4.41 STC (standard test conditions)
13 - 1.4.42 VOC ARRAY
13 - 1.4.43 VOC MOD
13 - 1.4.44 Voltage
16 - SECTION 2 PROTECTION REQUIREMENTS
16 - 2.1 GENERAL
16 - 2.2 BYPASS DIODES
16 - 2.3 BLOCKING DIODES
16 - 2.4 FAULT CURRENT PROTECTION
16 - 2.4.1 Number of parallel strings without overcurrent protection
16 - 2.4.2 Discrimination
17 - 2.4.3 PV strings
17 - 2.4.4 PV sub-arrays (subdivided PV arrays only)
17 - 2.4.5 PV array cables
18 - 2.4.6 Location of fault current protection devices
18 - 2.5 DISCONNECTING MEANS
18 - 2.5.1 General
18 - 2.5.2 Selection and installation
18 - 2.5.3 Disconnection device requirements
19 - 2.5.4 Extra-low voltage segmentation
19 - 2.6 EARTH FAULT PROTECTION
19 - 2.6.1 General
21 - 2.6.2 Earth fault protection settings
21 - 2.7 ALARMS
21 - 2.7.1 Visual alarms
21 - 2.7.2 Audible alarms
21 - 2.8 LIGHTNING AND OVERVOLTAGE PROTECTION
21 - 2.8.1 Lightning protection
21 - 2.8.2 Overvoltage protection
22 - SECTION 3 WIRING REQUIREMENTS
22 - 3.1 COMPLIANCE WITH AS/NZS 3000
22 - 3.2 SYSTEM VOLTAGE
22 - 3.3 INSTALLATION WIRING
22 - 3.3.1 General
22 - 3.3.2 Wiring loops
23 - 3.3.3 String wiring
23 - 3.3.4 Wiring installation in junction boxes
23 - 3.3.5 Location of PV array and PV sub-array junction boxes
23 - 3.4 CABLE SELECTION
23 - 3.4.1 Cable size
23 - 3.4.2 Insulation
24 - 3.5 WIRING IDENTIFICATION
25 - SECTION 4 COMPONENT REQUIREMENTS
25 - 4.1 PV MODULES
25 - 4.1.1 Reliability
25 - 4.1.2 Equipment class
25 - 4.2 PV ARRAY AND PV SUB-ARRAY JUNCTION BOXES
25 - 4.2.1 Environmental effects
25 - 4.3 SWITCHING DEVICES
25 - 4.3.1 General
25 - 4.3.2 Non-load-breaking switches
25 - 4.3.3 Current breaking devices
26 - 4.4 PLUGS, SOCKET-OUTLETS AND COUPLERS
26 - 4.5 FUSES
26 - 4.5.1 Ratings
26 - 4.5.2 Fuse holders
27 - SECTION 5 EARTHING
27 - 5.1 GENERAL
27 - 5.1.1 General
27 - 5.1.2 Point of connection of PV system earth
27 - 5.1.3 PV system earthing cable
27 - 5.1.4 Bonding conductors
27 - 5.2 PV ARRAY SYSTEM EARTHING
31 - 5.3 EARTHING OF EXPOSED CONDUCTIVE PARTS AND EQUIPOTENTIAL BONDING (SYSTEM BONDING)
31 - 5.4 EQUIPMENT EARTHING
33 - SECTION 6 MARKING AND SIGNS
33 - 6.1 GENERAL
33 - 6.2 PV ARRAY AND PV SUB-ARRAY JUNCTION BOXES
33 - 6.3 DISCONNECTION DEVICES
33 - 6.3.1 General
33 - 6.3.2 PV array main switch
33 - 6.4 FIRE EMERGENCY INFORMATION
34 - SECTION 7 DOCUMENTATION
34 - 7.1 DESIGN INFORMATION
34 - 7.2 COMMISSIONING INFORMATION
35 - SECTION 8 COMMISSIONING TESTS
35 - 8.1 GENERAL
35 - 8.2 OPEN CIRCUIT VOLTAGE
35 - 8.2.1 General
35 - 8.2.2 Procedure
35 - 8.3 SOLAR ISOLATION DEVICE TEST
36 - SECTION 9 CASE STUDIES
36 - 9.1 GENERAL
36 - 9.2 EXAMPLES
37 - APPENDIX A - CHARACTERISTICS OF PV ARRAYS AND SYSTEMS
37 - A1 PV ARRAYS
37 - A1.1 d.c. vs. a.c. behaviour
37 - A1.2 Series parallel configuration
37 - A1.3 Low fault levels
37 - A2 FAULT CURRENT PROTECTION
37 - A2.1 General
37 - A2.2 Fault current protection rating
38 - A2.3 Number of strings
38 - A2.4 Battery storage
38 - A2.5 Diodes
38 - A2.6 Operating temperature
38 - A3 PV SYSTEMS
38 - A3.1 Stand°alone photovoltaic (PV) systems with battery storage
39 - A3.2 Grid-connected photovoltaic (PV) systems
39 - A3.3 Solar water pumping system
40 - APPENDIX B - MECHANICAL SAFETY RECOMMENDATIONS
40 - B1 GENERAL
40 - B2 THERMAL ASPECTS
40 - B3 MECHANICAL LOADS ON PV STRUCTURES
41 - APPENDIX C - FAULT CURRENT ANALYSIS
41 - C1 GENERAL
41 - C2 FLOATING PV ARRAYS
44 - C3 EARTHED PV ARRAYS
45 - APPENDIX D - EARTHING ISSUES
45 - D1 BACKGROUND
45 - D1.1 Types of earthing
45 - D1.2 Purpose of earthing
45 - D1.3 General earthing considerations in a PV system
45 - D2 EARTHING OF EQUIPMENT CONDUCTIVE PARTS
46 - D3 EARTHING OF THE PV ARRAY (SYSTEM EARTH)
46 - D3.1 Options of PV array earthing
46 - D3.2 Typical earthing arrangements for PV arrays
48 - D4 COMPARISON BETWEEN EARTHING SCHEMES
48 - D4.1 Earth fault behaviour
49 - D4.2 Electric shock hazard
49 - D4.3 Fire hazard
50 - D5 OTHER CONSIDERATIONS
50 - D5.1 Battery systems
50 - D5.2 Non-isolated inverter systems for PV arrays
50 - D6 REFERENCES
51 - APPENDIX E - SUGGESTED METHODS OF DETECTION AND AUTOMATIC DISCONNECTION FOR EARTH FAULT PROTECTION
51 - E1 FLOATING SYSTEMS
51 - E2 EARTHED SYSTEMS CONNECTED TO THE LOAD VIA AN ISOLATED POWER CONDITIONING SYSTEM
51 - E3 GRID CONNECTED SYSTEMS CONNECTED TO THE LOAD VIA A NON-ISOLATED POWER CONDITIONING SYSTEM
52 - APPENDIX F - LIGHTNING/OVERVOLTAGE PROTECTION
52 - F1 LIGHTNING PROTECTION
52 - F2 OVERVOLTAGE PROTECTION
52 - F2.1 Equipotential bonding
53 - F2.2 Wiring loops
53 - F2.3 Surge arresters
54 - F2.4 Shielding
55 - APPENDIX G - EXAMPLES OF SIGNS
57 - APPENDIX H - MAINTENANCE REQUIREMENTS
57 - H1 SAFETY
57 - H2 PERIODIC MAINTENANCE
59 - H3 OPERATION AND MAINTENANCE PROCEDURES
60 - APPENDIX I - ADDITIONAL COMMISSIONING TESTS
60 - I1 GENERAL
60 - I2 OPEN CIRCUIT VOLTAGE MEASUREMENTS
60 - I2.1 General
60 - I2.2 Procedure
60 - I2.3 PV Arrays and sub-arrays measurement
60 - I2.4 Records
61 - I3 SHORT CIRCUIT CURRENT
61 - I3.1 General
61 - I3.2 Procedure
61 - I3.3 Records
61 - I4 INFRARED SCAN
62 - I5 PV ARRAY TRACKER OPERATION TEST (IF RELEVANT)
62 - I6 PV ARRAY I-V CURVE
62 - I7 EARTH FAULT PROTECTION TEST (IF RELEVANT)
62 - I7.1 General
62 - I7.2 Measurements
62 - I7.3 Procedure
63 - APPENDIX J - CASE STUDIES DIAGRAMS
63 - J1 GENERAL
63 - J2 NOTES ON CASE STUDIES

Specifies electrical installation requirements for PV arrays with an open circuit voltage of up to 600V d.c. or up to plus or minus 600V with respect to earth.

This Standard sets out the general installation requirements for photovoltaic (PV) arrays with d.c. open circuit voltages up to 600V between positive and negative conductors or up to (600V with respect to earth and a maximum power of 30kW.This includes the following PV array configurations (refer to Figures1.1 and 1.2) - Single string of modules.Multi-string PV array.PV array divided into several sub-arrays.Direct current systems, and photovoltaic systems in particular, pose some hazards in addition to those derived from conventional a.c. power systems, including the ability to produce and sustain electrical arcs with currents that are not much greater than normal operating currents. This Standard addresses the safety requirements arising from the particular characteristics of photovoltaic systems. A discussion of those characteristics is presented in AppendixA.Although this Standard does not cover PV array systems with a power greater than 30kW, similar principles can be used for such systems.

Committee
EL-042
DocumentType
Standard
ISBN
0 7337 6699 4
Pages
70
PublisherName
Standards Australia
Status
AvailableSuperseded
SupersededBy
Supersedes
UnderRevision

First published as AS/NZS5033:2005. First published as AS/NZS 5033:2005. Reissued incorporating Amendment No. 1 (January 2009).

AS/NZS 3000:2000 Electrical installations (known as the Australian/New Zealand Wiring Rules)
AS/NZS 3190:2002 Approval and test specification - Residual current devices (current-operated earth-leakage devices)
AS 4509.2-2002 Stand-alone power systems - System design guidelines
AS/NZS 3112:2004 Approval and test specification - Plugs and socket-outlets
AS/NZS 3008.1.1:1998 Electrical installations - Selection of cables - Cables for alternating voltages up to and including 0.6/1 kV - Typical Australian installation conditions
AS/NZS 3123:2005 Approval and test specification - Plugs, socket-outlets and couplers for general industrial application (Reconfirmed 2016)
AS 4509.1-1999 Stand-alone power systems - Safety requirements
AS 60529-2004 Degrees of protection provided by enclosures (IP Code) (Reconfirmed 2018)
AS/NZS 61009.1:2004 Residual current operated circuit breakers with integral overcurrent protection for household and similar uses (RCBOs) General rules (IEC 61009-1, Ed. 2.1 (2003) MOD)
AS/NZS 3008.1.2:1998 Electrical installations - Selection of cables - Cables for alternating voltages up to and including 0.6/1 kV - Typical New Zealand installation conditions
AS/NZS 61008.1:2004 Residual current operated circuit breakers without integral overcurrent protection for household and similar uses (RCCBs) General rules (IEC 61008-1, Ed. 2.1 (2002) MOD)
AS/NZS 1170.2:2002 Structural design actions Wind actions
AS/NZS 3133:2003 Approval and test specification - Air break switches
AS 1319-1994 Safety signs for the occupational environment (Reconfirmed 2018)
AS/NZS 3100:2002 Approval and test specification - General requirements for electrical equipment
AS/NZS 1768(INT):2003 Lightning protection

AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules)
AS/NZS 4509.1:2009 Stand-alone power systems Safety and installation (Reconfirmed 2017)
AS/NZS 4509.2:2010 Stand-alone power systems System design (Reconfirmed 2017)

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