AS 4777.1-2002

1 - AS 4777.1-2002 GRID CONNECTION OF ENERGY SYSTEMS VIA INVERTERS - INSTALLATION REQUIREMENTS
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 APPLICATION
6 - 3 NORMATIVE REFERENCES
6 - 4 DEFINITIONS
6 - 4.1 Distribution board
6 - 4.2 Electrical installation
6 - 4.3 Electricity distribution network
7 - 4.4 Grid
7 - 4.5 Grid protection device
7 - 4.6 Intermediate distribution board
7 - 4.7 Inverter
7 - 4.8 Inverter energy system
7 - 4.9 Islanding
7 - 4.10 Lockable switch
7 - 4.11 Residual current device (RCD)
7 - 4.12 Shall
7 - 4.13 Should
7 - 4.14 Uninterruptible power supply (UPS) system
7 - 5 INSTALLATION REQUIREMENTS
7 - 5.1 General
11 - 5.2 Inverter and grid protection device
11 - 5.3 a.c. circuit arrangements
11 - 5.3.1 Connection to switchboard
11 - 5.3.2 Cable sizing
11 - 5.3.3 Isolation switches
12 - 5.3.4 Residual current devices (RCDs)
12 - 5.3.5 Inverter over-current protection
12 - 5.4 Isolation of inverter from energy source
12 - 5.5 Labels
12 - 5.5.1 General
12 - 5.5.2 Switchboard to which inverter energy system is directly connected
13 - 5.5.3 Other switchboards
13 - 5.6 Additional requirements for UPS systems
13 - 5.6.1 General
13 - 5.6.2 Grid protection device
13 - 5.6.3 Circuit arrangement
13 - 5.6.4 RCDs
13 - 5.6.5 Warning sign
14 - APPENDIX A - SIGN EXAMPLES
14 - A1 OVERVIEW
14 - A2 SIGNS ON SWITCHBOARD TO WHICH INVERTER ENERGY SYSTEM IS DIRECTLY CONNECTED
15 - A3 SIGNS ON MAIN SWITCHBOARD AND INTERMEDIATE DISTRIBUTION BOARDS
16 - APPENDIX B - DANGER DURING UPS OPERATION
16 - B1 NORMAL OPERATION
16 - B2 UPS OPERATION

Specifies requirements for the installation of inverter energy systems with ratings up to 10 kVA for single-phase systems, or 30 kVA for three-phase systems, onto the low-voltage electricity distribution network (grid).

This Standard specifies the electrical installation requirements for inverter energy systems and grid protection devices with ratings up to 10 kVA for single phase units, or up to 30 kVA for three-phase units, for the injection of electric power through an electrical installation to the electricity distribution network.NOTES: 1 Although this Standard does not apply to larger systems, similar principles can be used for the installation of such systems.2 This Standard does not cover detailed installation requirements for the energy source(s) and its associated wiring.

First published as AS 4777.1-2002.