AS/NZS 4777.1:2016
Grid connection of energy systems via inverters - Part 1: Installation requirements
Specifies the electrical and general safety installation requirements for inverter energy systems (IES) up to or equal to 200 kVA for the injection of electric power to an electrical installation connected to the grid at low voltage.
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AS/NZS 4777.1:2016 GRID CONNECTION OF ENERGY SYSTEMS VIA INVERTERS - INSTALLATION REQUIREMENTS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE AND APPLICATION
1.1.1 Scope
1.1.2 Application
1.2 NORMATIVE REFERENCES
1.3 DEFINITIONS
1.3.1 Active (or active conductor)
1.3.2 Adjacent
1.3.3 Automatic disconnection device
1.3.4 Demand response
1.3.5 Demand response enabling device (DRED)
1.3.6 Distribution switchboard
1.3.7 Domestic dwelling
1.3.8 Electrical installation
1.3.9 Electricity distributor
1.3.10 Energy source
1.3.11 Export limit
1.3.12 Grid
1.3.13 Installation wiring
1.3.14 Intermediate distribution switchboard
1.3.15 Inverter
1.3.16 Inverter energy system (IES)
1.3.17 Islanding
1.3.18 Main switchboard
1.3.19 Multiple mode inverter (MMI)
1.3.20 Photovoltaic (PV) array
1.3.21 Pluggable equipment type B
1.3.22 Point of supply
1.3.23 Port
1.3.24 Rated
1.3.25 Rated apparent power
1.3.26 Rated current
1.3.27 Readily available
1.3.28 Residual current device (RCD)
1.3.29 Restricted access
1.3.30 Service life of IES
1.3.31 Shall
1.3.32 Should
1.3.33 Single-phase
1.3.34 Stand-alone functionality
1.3.35 Three-phase
1.3.36 Utilization voltage
1.3.37 Voltage unbalance
SECTION 2 GENERAL REQUIREMENTS
2.1 GENERAL
2.2 TYPICAL CONFIGURATIONS
2.3 GENERAL REQUIREMENTS FOR INVERTER ENERGY SYSTEMS (IES)
SECTION 3 CONNECTION OF THE IES TO THE ELECTRICAL INSTALLATION
3.1 GENERAL
3.2 CONNECTIONS
3.2.1 General
3.2.2 Connection to switchboard
3.2.3 Connector or coupling connections to the IES
3.3 SELECTION AND INSTALLATION OF WIRING SYSTEMS
3.3.1 General
3.3.2 Installation method
3.3.3 Voltage rise
3.4 CONTROL AND PROTECTION
3.4.1 General
3.4.2 Overcurrent protection
3.4.3 Isolation switches
3.4.4 Requirements for central protection and inverter integrated protection
3.4.5 Residual current devices (RCDs)
3.4.6 Demand response mode (DRM)
3.4.7 IES operational settings
3.4.8 Export control of an IES
SECTION 4 CONNECTION OF INVERTER TO ENERGY SOURCE
4.1 GENERAL
4.2 CONNECTORS OR COUPLING CONNECTIONS
4.3 CABLING
4.3.1 General requirements
4.3.2 Cable identification
4.4 OVERCURRENT PROTECTION
4.5 ISOLATION DEVICES
SECTION 5 ADDITIONAL REQUIREMENTS
5.1 EARTH FAULT DETECTION
5.1.1 General
5.1.2 Insulation monitoring
5.1.3 Residual current detection for PV IES
5.2 SEGREGATION OF CIRCUITS
5.3 ADDITIONAL INSTALLATION REQUIREMENTS
5.3.1 Inverter installation
5.3.2 Equipment weatherproofing
5.3.3 Seismic protection
5.4 ADDITIONAL REQUIREMENTS FOR MULTIPLE MODE IES
5.4.1 General
5.4.2 Additional inverter requirements
5.4.3 Circuit arrangement
5.4.4 RCDs on multiple mode inverter system final subcircuits
5.5 MULTIPLE INVERTER INSTALLATIONS
5.5.1 General
5.5.2 Single inverter or group of inverters with capacity no more than 5 kVA per phase
5.5.3 Inverters on the same switchboard
5.5.4 Inverter energy systems (IES) on different distribution switchboards
SECTION 6 SIGNS AND LABELS
6.1 GENERAL
6.2 SIGNS FOR THE SWITCHBOARD TO WHICH THE IES IS DIRECTLY CONNECTED
6.3 SIGNS FOR OTHER SWITCHBOARDS
6.4 SIGNS FOR INVERTER LOCATIONS
6.5 ENERGY SOURCE LABELLING
6.6 DEMAND RESPONSE MODE (DRM) LABELLING
6.7 SIGNS FOR SHUTDOWN PROCEDURE
6.8 SIGNS LOCATED ADJACENT TO INVERTER(S)
6.9 SIGNS FOR MULTIPLE SYSTEMS
6.10 SIGNS FOR MULTIPLE ENERGY SOURCES
6.11 SIGNS FOR MULTIPLE MODE IES (INCLUDING SYSTEMS WITH STAND-ALONE FUNCTIONALITY)
6.12 SIGNS FOR EMERGENCY SERVICES
SECTION 7 SYSTEM DOCUMENTATION AND COMMISSIONING
7.1 GENERAL
7.2 MANUAL
7.3 VERIFICATION
7.3.1 General
7.3.2 Initial verification
7.3.3 Periodic verification
7.3.4 Alterations, additions and repairs
7.4 VISUAL INSPECTION
7.5 TESTING
7.6 COMMISSIONING
APPENDIX A - EXAMPLE SIGNS
A1 OVERVIEW
A2 EXAMPLE SIGNS FOR THE SWITCHBOARD TO WHICH THE INVERTER ENERGY SYSTEM (IES) IS DIRECTLY CONNECTED
A3 EXAMPLE SIGNS FOR OTHER SWITCHBOARDS
A4 EXAMPLE SIGN FOR INVERTER LOCATIONS
A5 EXAMPLE ENERGY SOURCE LABELLING
A6 EXAMPLE DEMAND RESPONSE MODE (DRM) LABELLING
A7 EXAMPLE SIGN FOR SHUTDOWN PROCEDURE
A8 EXAMPLE SIGNS LOCATED ADJACENT TO INVERTERS
A9 EXAMPLE SIGNS FOR MULTIPLE SYSTEMS
A10 EXAMPLE SIGNS FOR MULTIPLE ENERGY SOURCES
A11 TYPICAL SIGNS FOR MULTIPLE MODE IES (INCLUDING SYSTEMS WITH STAND-ALONE FUNCTIONALITY)
APPENDIX B - DESIGN NOTES-MULTIPLE MODE INVERTER ENERGY SYSTEM WITH STAND-ALONE PORT AND ALTERNATE SUPPLY STAND-ALONE...
B1 NORMAL OPERATION
B2 OVERCURRENT FAULT CONDITIONS
APPENDIX C - DESIGN CONSIDERATIONS
C1 GENERAL
C2 ASSESSING THE CONSUMER INSTALLATION
C2.1 Site visit
C2.2 Assessing the site for the energy source installation
C2.3 Assessing the site for inverter location
C2.4 Assessing point of supply, main switchboard and tariff implications of connecting an IES
C2.5 Assessing site load and current energy use
C3 VOLTAGE RISE-ISSUES
C3.1 Maximum allowed voltage rise
C3.2 Example 1-Single-phase overhead grid connection with a single-phase 4 kVA inverter system
C3.3 Example 2-Three-phase connection with 5 kVA three-phase inverter system
C3.4 Example 3-Three-phase connection with 30 kVA three-phase inverter system
C4 PHASE BALANCE-ISSUES
APPENDIX D - ADDITIONAL RECOMMENDATIONS FOR PERIODIC VERIFICATION AND MAINTENANCE
APPENDIX E - EARTHING CONSIDERATION
APPENDIX F - INFORMATION ON ELECTRICITY DISTRIBUTOR REQUIREMENTS
F1 GENERAL
F2 AUSTRALIA
F3 INTEGRATION IN MINI OR ISOLATED GRIDS
F4 NEW ZEALAND
BIBLIOGRAPHY
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Related Information
Electricity Industry Participation Code Amendment (Application for Distrbuted Generation) 2021
Ministry: Electricity Authority
Section: Part 6: Schedule 6.1, Clause 1D
Citation context:1D: When application may be made under Part 1A
(1) A distributed generator may elect to apply to a distributor under Part 1A instead of Part 1 if the distributed generation to which the application relates—
(a) is designed and installed in accordance with AS/NZS 4777.1:2016; and
(b) incorporates an inverter that—
(i) has been tested and issued a Declaration of Conformity with AS/N 4777.2:2015 by a laboratory with accreditation issued or recognised by International Accreditation New Zealand; and
(ii) has settings that meet the distributor’s connection and operation standards.
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AS/NZS 4777.1:2016 GRID CONNECTION OF ENERGY SYSTEMS VIA INVERTERS - INSTALLATION REQUIREMENTS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE AND APPLICATION
1.1.1 Scope
1.1.2 Application
1.2 NORMATIVE REFERENCES
1.3 DEFINITIONS
1.3.1 Active (or active conductor)
1.3.2 Adjacent
1.3.3 Automatic disconnection device
1.3.4 Demand response
1.3.5 Demand response enabling device (DRED)
1.3.6 Distribution switchboard
1.3.7 Domestic dwelling
1.3.8 Electrical installation
1.3.9 Electricity distributor
1.3.10 Energy source
1.3.11 Export limit
1.3.12 Grid
1.3.13 Installation wiring
1.3.14 Intermediate distribution switchboard
1.3.15 Inverter
1.3.16 Inverter energy system (IES)
1.3.17 Islanding
1.3.18 Main switchboard
1.3.19 Multiple mode inverter (MMI)
1.3.20 Photovoltaic (PV) array
1.3.21 Pluggable equipment type B
1.3.22 Point of supply
1.3.23 Port
1.3.24 Rated
1.3.25 Rated apparent power
1.3.26 Rated current
1.3.27 Readily available
1.3.28 Residual current device (RCD)
1.3.29 Restricted access
1.3.30 Service life of IES
1.3.31 Shall
1.3.32 Should
1.3.33 Single-phase
1.3.34 Stand-alone functionality
1.3.35 Three-phase
1.3.36 Utilization voltage
1.3.37 Voltage unbalance
SECTION 2 GENERAL REQUIREMENTS
2.1 GENERAL
2.2 TYPICAL CONFIGURATIONS
2.3 GENERAL REQUIREMENTS FOR INVERTER ENERGY SYSTEMS (IES)
SECTION 3 CONNECTION OF THE IES TO THE ELECTRICAL INSTALLATION
3.1 GENERAL
3.2 CONNECTIONS
3.2.1 General
3.2.2 Connection to switchboard
3.2.3 Connector or coupling connections to the IES
3.3 SELECTION AND INSTALLATION OF WIRING SYSTEMS
3.3.1 General
3.3.2 Installation method
3.3.3 Voltage rise
3.4 CONTROL AND PROTECTION
3.4.1 General
3.4.2 Overcurrent protection
3.4.3 Isolation switches
3.4.4 Requirements for central protection and inverter integrated protection
3.4.5 Residual current devices (RCDs)
3.4.6 Demand response mode (DRM)
3.4.7 IES operational settings
3.4.8 Export control of an IES
SECTION 4 CONNECTION OF INVERTER TO ENERGY SOURCE
4.1 GENERAL
4.2 CONNECTORS OR COUPLING CONNECTIONS
4.3 CABLING
4.3.1 General requirements
4.3.2 Cable identification
4.4 OVERCURRENT PROTECTION
4.5 ISOLATION DEVICES
SECTION 5 ADDITIONAL REQUIREMENTS
5.1 EARTH FAULT DETECTION
5.1.1 General
5.1.2 Insulation monitoring
5.1.3 Residual current detection for PV IES
5.2 SEGREGATION OF CIRCUITS
5.3 ADDITIONAL INSTALLATION REQUIREMENTS
5.3.1 Inverter installation
5.3.2 Equipment weatherproofing
5.3.3 Seismic protection
5.4 ADDITIONAL REQUIREMENTS FOR MULTIPLE MODE IES
5.4.1 General
5.4.2 Additional inverter requirements
5.4.3 Circuit arrangement
5.4.4 RCDs on multiple mode inverter system final subcircuits
5.5 MULTIPLE INVERTER INSTALLATIONS
5.5.1 General
5.5.2 Single inverter or group of inverters with capacity no more than 5 kVA per phase
5.5.3 Inverters on the same switchboard
5.5.4 Inverter energy systems (IES) on different distribution switchboards
SECTION 6 SIGNS AND LABELS
6.1 GENERAL
6.2 SIGNS FOR THE SWITCHBOARD TO WHICH THE IES IS DIRECTLY CONNECTED
6.3 SIGNS FOR OTHER SWITCHBOARDS
6.4 SIGNS FOR INVERTER LOCATIONS
6.5 ENERGY SOURCE LABELLING
6.6 DEMAND RESPONSE MODE (DRM) LABELLING
6.7 SIGNS FOR SHUTDOWN PROCEDURE
6.8 SIGNS LOCATED ADJACENT TO INVERTER(S)
6.9 SIGNS FOR MULTIPLE SYSTEMS
6.10 SIGNS FOR MULTIPLE ENERGY SOURCES
6.11 SIGNS FOR MULTIPLE MODE IES (INCLUDING SYSTEMS WITH STAND-ALONE FUNCTIONALITY)
6.12 SIGNS FOR EMERGENCY SERVICES
SECTION 7 SYSTEM DOCUMENTATION AND COMMISSIONING
7.1 GENERAL
7.2 MANUAL
7.3 VERIFICATION
7.3.1 General
7.3.2 Initial verification
7.3.3 Periodic verification
7.3.4 Alterations, additions and repairs
7.4 VISUAL INSPECTION
7.5 TESTING
7.6 COMMISSIONING
APPENDIX A - EXAMPLE SIGNS
A1 OVERVIEW
A2 EXAMPLE SIGNS FOR THE SWITCHBOARD TO WHICH THE INVERTER ENERGY SYSTEM (IES) IS DIRECTLY CONNECTED
A3 EXAMPLE SIGNS FOR OTHER SWITCHBOARDS
A4 EXAMPLE SIGN FOR INVERTER LOCATIONS
A5 EXAMPLE ENERGY SOURCE LABELLING
A6 EXAMPLE DEMAND RESPONSE MODE (DRM) LABELLING
A7 EXAMPLE SIGN FOR SHUTDOWN PROCEDURE
A8 EXAMPLE SIGNS LOCATED ADJACENT TO INVERTERS
A9 EXAMPLE SIGNS FOR MULTIPLE SYSTEMS
A10 EXAMPLE SIGNS FOR MULTIPLE ENERGY SOURCES
A11 TYPICAL SIGNS FOR MULTIPLE MODE IES (INCLUDING SYSTEMS WITH STAND-ALONE FUNCTIONALITY)
APPENDIX B - DESIGN NOTES-MULTIPLE MODE INVERTER ENERGY SYSTEM WITH STAND-ALONE PORT AND ALTERNATE SUPPLY STAND-ALONE...
B1 NORMAL OPERATION
B2 OVERCURRENT FAULT CONDITIONS
APPENDIX C - DESIGN CONSIDERATIONS
C1 GENERAL
C2 ASSESSING THE CONSUMER INSTALLATION
C2.1 Site visit
C2.2 Assessing the site for the energy source installation
C2.3 Assessing the site for inverter location
C2.4 Assessing point of supply, main switchboard and tariff implications of connecting an IES
C2.5 Assessing site load and current energy use
C3 VOLTAGE RISE-ISSUES
C3.1 Maximum allowed voltage rise
C3.2 Example 1-Single-phase overhead grid connection with a single-phase 4 kVA inverter system
C3.3 Example 2-Three-phase connection with 5 kVA three-phase inverter system
C3.4 Example 3-Three-phase connection with 30 kVA three-phase inverter system
C4 PHASE BALANCE-ISSUES
APPENDIX D - ADDITIONAL RECOMMENDATIONS FOR PERIODIC VERIFICATION AND MAINTENANCE
APPENDIX E - EARTHING CONSIDERATION
APPENDIX F - INFORMATION ON ELECTRICITY DISTRIBUTOR REQUIREMENTS
F1 GENERAL
F2 AUSTRALIA
F3 INTEGRATION IN MINI OR ISOLATED GRIDS
F4 NEW ZEALAND
BIBLIOGRAPHY
AS/NZS 4777.1:2016
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.